From de7112868829b3286def38297848d5d2592b4a70 Mon Sep 17 00:00:00 2001
From: Sangwon Hong <qpakzk@gmail.com>
Date: Mon, 12 Feb 2018 04:37:44 +0900
Subject: [PATCH 01/28] perf kallsyms: Fix the usage on the man page

First, all man pages highlight only perf and subcommands except 'perf
kallsyms', which includes the full usage. Fix it for commands to
monopolize underlines.

Second, options can be ommited when executing 'perf kallsyms', so add
square brackets between <option>.

Signed-off-by: Sangwon Hong <qpakzk@gmail.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Taeung Song <treeze.taeung@gmail.com>
Link: http://lkml.kernel.org/r/1518377864-20353-1-git-send-email-qpakzk@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/Documentation/perf-kallsyms.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/Documentation/perf-kallsyms.txt b/tools/perf/Documentation/perf-kallsyms.txt
index 954ea9e21236d..cf9f4040ea5c7 100644
--- a/tools/perf/Documentation/perf-kallsyms.txt
+++ b/tools/perf/Documentation/perf-kallsyms.txt
@@ -8,7 +8,7 @@ perf-kallsyms - Searches running kernel for symbols
 SYNOPSIS
 --------
 [verse]
-'perf kallsyms <options> symbol_name[,symbol_name...]'
+'perf kallsyms' [<options>] symbol_name[,symbol_name...]
 
 DESCRIPTION
 -----------

From 42811d509d6e0b0118918ce6be346be54d8e8801 Mon Sep 17 00:00:00 2001
From: Andi Kleen <ak@linux.intel.com>
Date: Thu, 5 Oct 2017 19:00:28 -0700
Subject: [PATCH 02/28] perf stat: Use xyarray dimensions to iterate fds

Now that the xyarray stores the dimensions we can use those
to iterate over the FDs for a evsel.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20171006020029.13339-1-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-stat.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 2d49eccf98f27..fadcff52cd094 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -508,14 +508,13 @@ static int perf_stat_synthesize_config(bool is_pipe)
 
 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
 
-static int __store_counter_ids(struct perf_evsel *counter,
-			       struct cpu_map *cpus,
-			       struct thread_map *threads)
+static int __store_counter_ids(struct perf_evsel *counter)
 {
 	int cpu, thread;
 
-	for (cpu = 0; cpu < cpus->nr; cpu++) {
-		for (thread = 0; thread < threads->nr; thread++) {
+	for (cpu = 0; cpu < xyarray__max_x(counter->fd); cpu++) {
+		for (thread = 0; thread < xyarray__max_y(counter->fd);
+		     thread++) {
 			int fd = FD(counter, cpu, thread);
 
 			if (perf_evlist__id_add_fd(evsel_list, counter,
@@ -535,7 +534,7 @@ static int store_counter_ids(struct perf_evsel *counter)
 	if (perf_evsel__alloc_id(counter, cpus->nr, threads->nr))
 		return -ENOMEM;
 
-	return __store_counter_ids(counter, cpus, threads);
+	return __store_counter_ids(counter);
 }
 
 static bool perf_evsel__should_store_id(struct perf_evsel *counter)

From 25f72f9ed88d5be86c92432fc779e2725e3506cd Mon Sep 17 00:00:00 2001
From: weiping zhang <zhangweiping@didichuxing.com>
Date: Mon, 29 Jan 2018 23:48:09 +0800
Subject: [PATCH 03/28] perf cgroup: Simplify arguments when tracking multiple
 events

When using -G with one cgroup and -e with multiple events, only the
first event gets the correct cgroup setting, all events from the second
onwards will track system-wide events.

If the user wants to track multiple events for a specific cgroup, the
user must give parameters like the following:

  $ perf stat -e e1 -e e2 -e e3 -G test,test,test

This patch simplify this case, just type one cgroup:

  $ perf stat -e e1 -e e2 -e e3 -G test

  $ mkdir -p /sys/fs/cgroup/perf_event/empty_cgroup
  $ perf stat -e cycles -e cache-misses -a -I 1000 -G empty_cgroup

Before:

     1.001007226   <not counted>      cycles	   empty_cgroup
     1.001007226           7,506      cache-misses

After:

     1.000834097   <not counted>      cycles	   empty_cgroup
     1.000834097   <not counted>      cache-misses empty_cgroup

Signed-off-by: weiping zhang <zhangweiping@didichuxing.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180129154805.GA6284@localhost.didichuxing.com
[ Improved the doc text a bit, providing an example for cgroup + system wide counting ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/Documentation/perf-record.txt |  6 +++++-
 tools/perf/Documentation/perf-stat.txt   |  6 +++++-
 tools/perf/util/cgroup.c                 | 17 ++++++++++++++++-
 3 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index 3eea6de35a38d..76bc2181d2141 100644
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -308,7 +308,11 @@ can be provided. Each cgroup is applied to the corresponding event, i.e., first
 to first event, second cgroup to second event and so on. It is possible to provide
 an empty cgroup (monitor all the time) using, e.g., -G foo,,bar. Cgroups must have
 corresponding events, i.e., they always refer to events defined earlier on the command
-line.
+line. If the user wants to track multiple events for a specific cgroup, the user can
+use '-e e1 -e e2 -G foo,foo' or just use '-e e1 -e e2 -G foo'.
+
+If wanting to monitor, say, 'cycles' for a cgroup and also for system wide, this
+command line can be used: 'perf stat -e cycles -G cgroup_name -a -e cycles'.
 
 -b::
 --branch-any::
diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt
index 2bbe79a50d3c6..2b38e222016af 100644
--- a/tools/perf/Documentation/perf-stat.txt
+++ b/tools/perf/Documentation/perf-stat.txt
@@ -118,7 +118,11 @@ can be provided. Each cgroup is applied to the corresponding event, i.e., first
 to first event, second cgroup to second event and so on. It is possible to provide
 an empty cgroup (monitor all the time) using, e.g., -G foo,,bar. Cgroups must have
 corresponding events, i.e., they always refer to events defined earlier on the command
-line.
+line. If the user wants to track multiple events for a specific cgroup, the user can
+use '-e e1 -e e2 -G foo,foo' or just use '-e e1 -e e2 -G foo'.
+
+If wanting to monitor, say, 'cycles' for a cgroup and also for system wide, this
+command line can be used: 'perf stat -e cycles -G cgroup_name -a -e cycles'.
 
 -o file::
 --output file::
diff --git a/tools/perf/util/cgroup.c b/tools/perf/util/cgroup.c
index 984f69144f87e..5dd9b5ea314de 100644
--- a/tools/perf/util/cgroup.c
+++ b/tools/perf/util/cgroup.c
@@ -157,9 +157,11 @@ int parse_cgroups(const struct option *opt __maybe_unused, const char *str,
 		  int unset __maybe_unused)
 {
 	struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
+	struct perf_evsel *counter;
+	struct cgroup_sel *cgrp = NULL;
 	const char *p, *e, *eos = str + strlen(str);
 	char *s;
-	int ret;
+	int ret, i;
 
 	if (list_empty(&evlist->entries)) {
 		fprintf(stderr, "must define events before cgroups\n");
@@ -188,5 +190,18 @@ int parse_cgroups(const struct option *opt __maybe_unused, const char *str,
 			break;
 		str = p+1;
 	}
+	/* for the case one cgroup combine to multiple events */
+	i = 0;
+	if (nr_cgroups == 1) {
+		evlist__for_each_entry(evlist, counter) {
+			if (i == 0)
+				cgrp = counter->cgrp;
+			else {
+				counter->cgrp = cgrp;
+				refcount_inc(&cgrp->refcnt);
+			}
+			i++;
+		}
+	}
 	return 0;
 }

From 853745f5e6d95faaae6381c9a01dbd43de992fb3 Mon Sep 17 00:00:00 2001
From: Kan Liang <Kan.liang@intel.com>
Date: Mon, 26 Feb 2018 10:17:10 -0800
Subject: [PATCH 04/28] perf top: Fix annoying fallback message on older
 kernels
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

On older (e.g. v4.4) kernels, an annoying fallback message can be
observed in 'perf top':

	┌─Warning:──────────────────────┐
	│fall back to non-overwrite mode│
	│                               │
	│                               │
	│Press any key...               │
	└───────────────────────────────┘

The 'perf top' utility has been changed to overwrite mode since commit
ebebbf082357 ("perf top: Switch default mode to overwrite mode").

For older kernels which don't have overwrite mode support, 'perf top'
will fall back to non-overwrite mode and print out the fallback message
using ui__warning(), which needs user's input to close.

The fallback message is not critical for end users. Turning it to debug
message which is printed when running with -vv.

Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Kan Liang <kan.liang@intel.com>
Cc: Kan Liang <kan.liang@intel.com>
Fixes: ebebbf082357 ("perf top: Switch default mode to overwrite mode")
Link: http://lkml.kernel.org/r/1519669030-176549-1-git-send-email-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-top.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index b7c823ba8374f..35ac016fcb988 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -991,7 +991,7 @@ static int perf_top_overwrite_fallback(struct perf_top *top,
 	evlist__for_each_entry(evlist, counter)
 		counter->attr.write_backward = false;
 	opts->overwrite = false;
-	ui__warning("fall back to non-overwrite mode\n");
+	pr_debug2("fall back to non-overwrite mode\n");
 	return 1;
 }
 

From ab6c79b819f5a50cf41a11ebec17bef63b530333 Mon Sep 17 00:00:00 2001
From: Jin Yao <yao.jin@linux.intel.com>
Date: Tue, 16 Jan 2018 23:43:08 +0800
Subject: [PATCH 05/28] perf stat: Ignore error thread when enabling
 system-wide --per-thread

If we execute 'perf stat --per-thread' with non-root account (even set
kernel.perf_event_paranoid = -1 yet), it reports the error:

  jinyao@skl:~$ perf stat --per-thread
  Error:
  You may not have permission to collect system-wide stats.

  Consider tweaking /proc/sys/kernel/perf_event_paranoid,
  which controls use of the performance events system by
  unprivileged users (without CAP_SYS_ADMIN).

  The current value is 2:

    -1: Allow use of (almost) all events by all users
        Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK
  >= 0: Disallow ftrace function tracepoint by users without CAP_SYS_ADMIN
        Disallow raw tracepoint access by users without CAP_SYS_ADMIN
  >= 1: Disallow CPU event access by users without CAP_SYS_ADMIN
  >= 2: Disallow kernel profiling by users without CAP_SYS_ADMIN

  To make this setting permanent, edit /etc/sysctl.conf too, e.g.:

          kernel.perf_event_paranoid = -1

Perhaps the ptrace rule doesn't allow to trace some processes. But anyway
the global --per-thread mode had better ignore such errors and continue
working on other threads.

This patch will record the index of error thread in perf_evsel__open()
and remove this thread before retrying.

For example (run with non-root, kernel.perf_event_paranoid isn't set):

  jinyao@skl:~$ perf stat --per-thread
  ^C
   Performance counter stats for 'system wide':

         vmstat-3458    6.171984   cpu-clock:u (msec) #  0.000 CPUs utilized
           perf-3670    0.515599   cpu-clock:u (msec) #  0.000 CPUs utilized
         vmstat-3458   1,163,643   cycles:u           #  0.189 GHz
           perf-3670      40,881   cycles:u           #  0.079 GHz
         vmstat-3458   1,410,238   instructions:u     #  1.21  insn per cycle
           perf-3670       3,536   instructions:u     #  0.09  insn per cycle
         vmstat-3458     288,937   branches:u         # 46.814 M/sec
           perf-3670         936   branches:u         #  1.815 M/sec
         vmstat-3458      15,195   branch-misses:u    #  5.26% of all branches
           perf-3670          76   branch-misses:u    #  8.12% of all branches

        12.651675247 seconds time elapsed

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1516117388-10120-1-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-stat.c    | 14 +++++++++++++-
 tools/perf/util/evsel.c      |  3 +++
 tools/perf/util/thread_map.c |  1 +
 tools/perf/util/thread_map.h |  1 +
 4 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index fadcff52cd094..6214d2b220b29 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -637,7 +637,19 @@ static int __run_perf_stat(int argc, const char **argv)
                                 if (verbose > 0)
                                         ui__warning("%s\n", msg);
                                 goto try_again;
-                        }
+			} else if (target__has_per_thread(&target) &&
+				   evsel_list->threads &&
+				   evsel_list->threads->err_thread != -1) {
+				/*
+				 * For global --per-thread case, skip current
+				 * error thread.
+				 */
+				if (!thread_map__remove(evsel_list->threads,
+							evsel_list->threads->err_thread)) {
+					evsel_list->threads->err_thread = -1;
+					goto try_again;
+				}
+			}
 
 			perf_evsel__open_strerror(counter, &target,
 						  errno, msg, sizeof(msg));
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index ef351688b7979..b56e1c2ddaee2 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1915,6 +1915,9 @@ int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
 		goto fallback_missing_features;
 	}
 out_close:
+	if (err)
+		threads->err_thread = thread;
+
 	do {
 		while (--thread >= 0) {
 			close(FD(evsel, cpu, thread));
diff --git a/tools/perf/util/thread_map.c b/tools/perf/util/thread_map.c
index 729dad8f412d6..5d467d8ae9abf 100644
--- a/tools/perf/util/thread_map.c
+++ b/tools/perf/util/thread_map.c
@@ -32,6 +32,7 @@ static void thread_map__reset(struct thread_map *map, int start, int nr)
 	size_t size = (nr - start) * sizeof(map->map[0]);
 
 	memset(&map->map[start], 0, size);
+	map->err_thread = -1;
 }
 
 static struct thread_map *thread_map__realloc(struct thread_map *map, int nr)
diff --git a/tools/perf/util/thread_map.h b/tools/perf/util/thread_map.h
index 5ec91cfd18696..2f689c90a8c6d 100644
--- a/tools/perf/util/thread_map.h
+++ b/tools/perf/util/thread_map.h
@@ -14,6 +14,7 @@ struct thread_map_data {
 struct thread_map {
 	refcount_t refcnt;
 	int nr;
+	int err_thread;
 	struct thread_map_data map[];
 };
 

From 9c04409d7f5c325233961673356ea8aced6a4ef3 Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Thu, 1 Mar 2018 11:33:59 -0300
Subject: [PATCH 06/28] perf annotate browser: Be more robust when drawing jump
 arrows
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This first happened with a gcc function, _cpp_lex_token, that has the
usual jumps:

 │1159e6c: ↓ jne    115aa32 <_cpp_lex_token@@Base+0xf92>

I.e. jumps to a label inside that function (_cpp_lex_token), and those
works, but also this kind:

 │1159e8b: ↓ jne    c469be <cpp_named_operator2name@@Base+0xa72>

I.e. jumps to another function, outside _cpp_lex_token, which are not
being correctly handled generating as a side effect references to
ab->offset[] entries that are set to NULL, so to make this code more
robust, check that here.

A proper fix for will be put in place, looking at the function name
right after the '<' token and probably treating this like a 'call'
instruction.

For now just don't draw the arrow.

Reported-by: Ingo Molnar <mingo@kernel.org>
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Kan Liang <kan.liang@intel.com>
Link: https://lkml.kernel.org/n/tip-5tzvb875ep2sel03aeefgmud@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/ui/browsers/annotate.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
index e2f666391ac47..6ff6839558b00 100644
--- a/tools/perf/ui/browsers/annotate.c
+++ b/tools/perf/ui/browsers/annotate.c
@@ -328,7 +328,32 @@ static void annotate_browser__draw_current_jump(struct ui_browser *browser)
 	if (!disasm_line__is_valid_jump(cursor, sym))
 		return;
 
+	/*
+	 * This first was seen with a gcc function, _cpp_lex_token, that
+	 * has the usual jumps:
+	 *
+	 *  │1159e6c: ↓ jne    115aa32 <_cpp_lex_token@@Base+0xf92>
+	 *
+	 * I.e. jumps to a label inside that function (_cpp_lex_token), and
+	 * those works, but also this kind:
+	 *
+	 *  │1159e8b: ↓ jne    c469be <cpp_named_operator2name@@Base+0xa72>
+	 *
+	 *  I.e. jumps to another function, outside _cpp_lex_token, which
+	 *  are not being correctly handled generating as a side effect references
+	 *  to ab->offset[] entries that are set to NULL, so to make this code
+	 *  more robust, check that here.
+	 *
+	 *  A proper fix for will be put in place, looking at the function
+	 *  name right after the '<' token and probably treating this like a
+	 *  'call' instruction.
+	 */
 	target = ab->offsets[cursor->ops.target.offset];
+	if (target == NULL) {
+		ui_helpline__printf("WARN: jump target inconsistency, press 'o', ab->offsets[%#x] = NULL\n",
+				    cursor->ops.target.offset);
+		return;
+	}
 
 	bcursor = browser_line(&cursor->al);
 	btarget = browser_line(target);

From a18ee796f8af5569628c324700b9a34b88884488 Mon Sep 17 00:00:00 2001
From: Jiri Olsa <jolsa@kernel.org>
Date: Thu, 1 Mar 2018 17:52:14 +0100
Subject: [PATCH 07/28] perf tests: Switch trace+probe_libc_inet_pton to use
 record

There's a problem with relying on backtrace data from 'perf trace' the
way the trace+probe_libc_inet_pton does. This test inserts uprobe within
ping binary and checks that it gets its sample using 'perf trace'.

It also checks it gets proper backtrace from sample and that's where the
issue is.

The 'perf trace' does not sort events (by definition) so it can happen
that it processes the event sample before the ping binary memory map
event. This can (very rarely) happen as proved by this events dump
output (from custom added debug output):

  ...
  7680/7680: [0x7f4e29718000(0x204000) @ 0 fd:00 33611321 4230892504]: r-xp /usr/lib64/libdl-2.17.so
  7680/7680: [0x7f4e29502000(0x216000) @ 0 fd:00 33617257 2606846872]: r-xp /usr/lib64/libz.so.1.2.7
  (IP, 0x2): 7680/7680: 0x7f4e29c2ed60 period: 1 addr: 0
  7680/7680: [0x564842ef0000(0x233000) @ 0 fd:00 83 1989280200]: r-xp /usr/bin/ping
  7680/7680: [0x7f4e2aca2000(0x224000) @ 0 fd:00 33611308 1219144940]: r-xp /usr/lib64/ld-2.17.so
  ...

In this case 'perf trace' fails to resolve the last callchain IP (within
the ping binary) because it does not know about the ping binary memory
map yet and the test fails like this:

  PING ::1(::1) 56 data bytes
  64 bytes from ::1: icmp_seq=1 ttl=64 time=0.037 ms
  --- ::1 ping statistics ---
  1 packets transmitted, 1 received, 0% packet loss, time 0ms
  rtt min/avg/max/mdev = 0.037/0.037/0.037/0.000 ms
  0.000 probe_libc:inet_pton:(7f4e29c2ed60))
  __GI___inet_pton (/usr/lib64/libc-2.17.so)
  getaddrinfo (/usr/lib64/libc-2.17.so)
  [0] ([unknown])
  FAIL: expected backtrace entry 8 ".*\(.*/bin/ping.*\)$" got "[0] ([unknown])"

Switching the test to use 'perf record' and 'perf script' instead of
'perf trace'.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180301165215.6780-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 .../tests/shell/trace+probe_libc_inet_pton.sh | 30 +++++++++----------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/tools/perf/tests/shell/trace+probe_libc_inet_pton.sh b/tools/perf/tests/shell/trace+probe_libc_inet_pton.sh
index 8c4ab0b390c06..52c3ee701a895 100755
--- a/tools/perf/tests/shell/trace+probe_libc_inet_pton.sh
+++ b/tools/perf/tests/shell/trace+probe_libc_inet_pton.sh
@@ -15,30 +15,28 @@ nm -g $libc 2>/dev/null | fgrep -q inet_pton || exit 254
 
 trace_libc_inet_pton_backtrace() {
 	idx=0
-	expected[0]="PING.*bytes"
-	expected[1]="64 bytes from ::1.*"
-	expected[2]=".*ping statistics.*"
-	expected[3]=".*packets transmitted.*"
-	expected[4]="rtt min.*"
-	expected[5]="[0-9]+\.[0-9]+[[:space:]]+probe_libc:inet_pton:\([[:xdigit:]]+\)"
-	expected[6]=".*inet_pton[[:space:]]\($libc|inlined\)$"
+	expected[0]="ping[][0-9 \.:]+probe_libc:inet_pton: \([[:xdigit:]]+\)"
+	expected[1]=".*inet_pton[[:space:]]\($libc\)$"
 	case "$(uname -m)" in
 	s390x)
 		eventattr='call-graph=dwarf'
-		expected[7]="gaih_inet.*[[:space:]]\($libc|inlined\)$"
-		expected[8]="__GI_getaddrinfo[[:space:]]\($libc|inlined\)$"
-		expected[9]="main[[:space:]]\(.*/bin/ping.*\)$"
-		expected[10]="__libc_start_main[[:space:]]\($libc\)$"
-		expected[11]="_start[[:space:]]\(.*/bin/ping.*\)$"
+		expected[2]="gaih_inet.*[[:space:]]\($libc|inlined\)$"
+		expected[3]="__GI_getaddrinfo[[:space:]]\($libc|inlined\)$"
+		expected[4]="main[[:space:]]\(.*/bin/ping.*\)$"
+		expected[5]="__libc_start_main[[:space:]]\($libc\)$"
+		expected[6]="_start[[:space:]]\(.*/bin/ping.*\)$"
 		;;
 	*)
 		eventattr='max-stack=3'
-		expected[7]="getaddrinfo[[:space:]]\($libc\)$"
-		expected[8]=".*\(.*/bin/ping.*\)$"
+		expected[2]="getaddrinfo[[:space:]]\($libc\)$"
+		expected[3]=".*\(.*/bin/ping.*\)$"
 		;;
 	esac
 
-	perf trace --no-syscalls -e probe_libc:inet_pton/$eventattr/ ping -6 -c 1 ::1 2>&1 | grep -v ^$ | while read line ; do
+	file=`mktemp -u /tmp/perf.data.XXX`
+
+	perf record -e probe_libc:inet_pton/$eventattr/ -o $file ping -6 -c 1 ::1 > /dev/null 2>&1
+	perf script -i $file | while read line ; do
 		echo $line
 		echo "$line" | egrep -q "${expected[$idx]}"
 		if [ $? -ne 0 ] ; then
@@ -48,6 +46,8 @@ trace_libc_inet_pton_backtrace() {
 		let idx+=1
 		[ -z "${expected[$idx]}" ] && break
 	done
+
+	rm -f $file
 }
 
 # Check for IPv6 interface existence

From 4f67336870f641daa485ea504777486e24a9aece Mon Sep 17 00:00:00 2001
From: Jiri Olsa <jolsa@kernel.org>
Date: Thu, 1 Mar 2018 17:52:15 +0100
Subject: [PATCH 08/28] perf tests: Rename trace+probe_libc_inet_pton to
 record+probe_libc_inet_pton

Because the test is no longer using perf trace but perf record instead.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180301165215.6780-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 ...ace+probe_libc_inet_pton.sh => record+probe_libc_inet_pton.sh} | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 rename tools/perf/tests/shell/{trace+probe_libc_inet_pton.sh => record+probe_libc_inet_pton.sh} (100%)

diff --git a/tools/perf/tests/shell/trace+probe_libc_inet_pton.sh b/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
similarity index 100%
rename from tools/perf/tests/shell/trace+probe_libc_inet_pton.sh
rename to tools/perf/tests/shell/record+probe_libc_inet_pton.sh

From 67230479b2304be99e9451ee171aa288a112ea16 Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Thu, 1 Mar 2018 13:46:23 -0300
Subject: [PATCH 09/28] perf record: Allow asking for the maximum allowed
 sample rate

Add the handy '-F max' shortcut to reading and using the
kernel.perf_event_max_sample_rate value as the user supplied
sampling frequency:

  # perf record -F max sleep 1
  info: Using a maximum frequency rate of 15,000 Hz
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.019 MB perf.data (14 samples) ]
  # sysctl kernel.perf_event_max_sample_rate
  kernel.perf_event_max_sample_rate = 15000
  # perf evlist -v
  cycles:ppp: size: 112, { sample_period, sample_freq }: 15000, sample_type: IP|TID|TIME|PERIOD, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, enable_on_exec: 1, task: 1, precise_ip: 3, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1

  # perf record -F 10 sleep 1
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.019 MB perf.data (4 samples) ]
  # perf evlist -v
  cycles:ppp: size: 112, { sample_period, sample_freq }: 10, sample_type: IP|TID|TIME|PERIOD, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, enable_on_exec: 1, task: 1, precise_ip: 3, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1
  #

Suggested-by: Ingo Molnar <mingo@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-4y0tiuws62c64gp4cf0hme0m@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/Documentation/perf-record.txt |  4 +++-
 tools/perf/builtin-record.c              |  7 ++++++-
 tools/perf/perf.h                        |  2 ++
 tools/perf/util/record.c                 | 23 +++++++++++++++++++++++
 4 files changed, 34 insertions(+), 2 deletions(-)

diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index 76bc2181d2141..94f2faebc7f0f 100644
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -193,7 +193,9 @@ OPTIONS
 	Child tasks do not inherit counters.
 -F::
 --freq=::
-	Profile at this frequency.
+	Profile at this frequency. Use 'max' to use the currently maximum
+	allowed frequency, i.e. the value in the kernel.perf_event_max_sample_rate
+	sysctl.
 
 -m::
 --mmap-pages=::
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 9072672069731..e1821eea14ef3 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -45,6 +45,7 @@
 
 #include <errno.h>
 #include <inttypes.h>
+#include <locale.h>
 #include <poll.h>
 #include <unistd.h>
 #include <sched.h>
@@ -1542,7 +1543,9 @@ static struct option __record_options[] = {
 	OPT_BOOLEAN(0, "tail-synthesize", &record.opts.tail_synthesize,
 		    "synthesize non-sample events at the end of output"),
 	OPT_BOOLEAN(0, "overwrite", &record.opts.overwrite, "use overwrite mode"),
-	OPT_UINTEGER('F', "freq", &record.opts.user_freq, "profile at this frequency"),
+	OPT_CALLBACK('F', "freq", &record.opts, "freq or 'max'",
+		     "profile at this frequency",
+		      record__parse_freq),
 	OPT_CALLBACK('m', "mmap-pages", &record.opts, "pages[,pages]",
 		     "number of mmap data pages and AUX area tracing mmap pages",
 		     record__parse_mmap_pages),
@@ -1651,6 +1654,8 @@ int cmd_record(int argc, const char **argv)
 	struct record *rec = &record;
 	char errbuf[BUFSIZ];
 
+	setlocale(LC_ALL, "");
+
 #ifndef HAVE_LIBBPF_SUPPORT
 # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, "NO_LIBBPF=1", c)
 	set_nobuild('\0', "clang-path", true);
diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index cfe46236a5e5b..a5df8bf73a681 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -82,4 +82,6 @@ struct record_opts {
 struct option;
 extern const char * const *record_usage;
 extern struct option *record_options;
+
+int record__parse_freq(const struct option *opt, const char *str, int unset);
 #endif
diff --git a/tools/perf/util/record.c b/tools/perf/util/record.c
index 1e97937b03a93..acabf54ceccb6 100644
--- a/tools/perf/util/record.c
+++ b/tools/perf/util/record.c
@@ -5,6 +5,7 @@
 #include "parse-events.h"
 #include <errno.h>
 #include <api/fs/fs.h>
+#include <subcmd/parse-options.h>
 #include "util.h"
 #include "cloexec.h"
 
@@ -287,3 +288,25 @@ bool perf_evlist__can_select_event(struct perf_evlist *evlist, const char *str)
 	perf_evlist__delete(temp_evlist);
 	return ret;
 }
+
+int record__parse_freq(const struct option *opt, const char *str, int unset __maybe_unused)
+{
+	unsigned int freq;
+	struct record_opts *opts = opt->value;
+
+	if (!str)
+		return -EINVAL;
+
+	if (strcasecmp(str, "max") == 0) {
+		if (get_max_rate(&freq)) {
+			pr_err("couldn't read /proc/sys/kernel/perf_event_max_sample_rate\n");
+			return -1;
+		}
+		pr_info("info: Using a maximum frequency rate of %'d Hz\n", freq);
+	} else {
+		freq = atoi(str);
+	}
+
+	opts->user_freq = freq;
+	return 0;
+}

From a9980a6dbb9efd154b032ad729c869784302f361 Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Thu, 1 Mar 2018 14:22:12 -0300
Subject: [PATCH 10/28] perf top browser: Show sample_freq in browser title
 line

The '--stdio' 'perf top' UI shows it, so lets remove this UI difference
and show it too in '--tui', will be useful for 'perf top --tui -F max'.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-n3wd8n395uo4y9irst29pjic@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/ui/browsers/hists.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 6495ee55d9c38..de2bde232cb30 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -2223,7 +2223,7 @@ static int perf_evsel_browser_title(struct hist_browser *browser,
 	u64 nr_events = hists->stats.total_period;
 	struct perf_evsel *evsel = hists_to_evsel(hists);
 	const char *ev_name = perf_evsel__name(evsel);
-	char buf[512];
+	char buf[512], sample_freq_str[64] = "";
 	size_t buflen = sizeof(buf);
 	char ref[30] = " show reference callgraph, ";
 	bool enable_ref = false;
@@ -2255,10 +2255,14 @@ static int perf_evsel_browser_title(struct hist_browser *browser,
 	if (symbol_conf.show_ref_callgraph &&
 	    strstr(ev_name, "call-graph=no"))
 		enable_ref = true;
+
+	if (!is_report_browser(hbt))
+		scnprintf(sample_freq_str, sizeof(sample_freq_str), " %d Hz,", evsel->attr.sample_freq);
+
 	nr_samples = convert_unit(nr_samples, &unit);
 	printed = scnprintf(bf, size,
-			   "Samples: %lu%c of event '%s',%sEvent count (approx.): %" PRIu64,
-			   nr_samples, unit, ev_name, enable_ref ? ref : " ", nr_events);
+			   "Samples: %lu%c of event '%s',%s%sEvent count (approx.): %" PRIu64,
+			   nr_samples, unit, ev_name, sample_freq_str, enable_ref ? ref : " ", nr_events);
 
 
 	if (hists->uid_filter_str)

From 7831bf236505bcb2a0a1255e7f3e902a0cb732d6 Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Thu, 1 Mar 2018 14:25:56 -0300
Subject: [PATCH 11/28] perf top: Allow asking for the maximum allowed sample
 rate

Add the handy '-F max' shortcut, just introduced to 'perf record', to
reading and using the kernel.perf_event_max_sample_rate value as the
user supplied sampling frequency:

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-hz04f296zccknnb5at06a6q0@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/Documentation/perf-top.txt | 4 +++-
 tools/perf/builtin-top.c              | 4 +++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt
index 8a32cc77bead3..a039407d63b80 100644
--- a/tools/perf/Documentation/perf-top.txt
+++ b/tools/perf/Documentation/perf-top.txt
@@ -55,7 +55,9 @@ Default is to monitor all CPUS.
 
 -F <freq>::
 --freq=<freq>::
-	Profile at this frequency.
+	Profile at this frequency. Use 'max' to use the currently maximum
+	allowed frequency, i.e. the value in the kernel.perf_event_max_sample_rate
+	sysctl.
 
 -i::
 --inherit::
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 35ac016fcb988..bb4f9fafd11d8 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1307,7 +1307,9 @@ int cmd_top(int argc, const char **argv)
 	OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
 		    "symbol to annotate"),
 	OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"),
-	OPT_UINTEGER('F', "freq", &opts->user_freq, "profile at this frequency"),
+	OPT_CALLBACK('F', "freq", &top.record_opts, "freq or 'max'",
+		     "profile at this frequency",
+		      record__parse_freq),
 	OPT_INTEGER('E', "entries", &top.print_entries,
 		    "display this many functions"),
 	OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,

From b09c2364a4dc2a67e640c2b839d936302815693f Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Thu, 1 Mar 2018 14:52:50 -0300
Subject: [PATCH 12/28] perf record: Throttle user defined frequencies to the
 maximum allowed

  # perf record -F 200000 sleep 1
  warning: Maximum frequency rate (15,000 Hz) exceeded, throttling from 200,000 Hz to 15,000 Hz.
           The limit can be raised via /proc/sys/kernel/perf_event_max_sample_rate.
           The kernel will lower it when perf's interrupts take too long.
	   Use --strict-freq to disable this throttling, refusing to record.
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.019 MB perf.data (15 samples) ]
  # perf evlist -v
  cycles:ppp: size: 112, { sample_period, sample_freq }: 15000, sample_type: IP|TID|TIME|PERIOD, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, enable_on_exec: 1, task: 1, precise_ip: 3, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1

For those wanting that it fails if the desired frequency can't be used:

  # perf record --strict-freq -F 200000 sleep 1
  error: Maximum frequency rate (15,000 Hz) exceeded.
         Please use -F freq option with a lower value or consider
         tweaking /proc/sys/kernel/perf_event_max_sample_rate.
  #

Suggested-by: Ingo Molnar <mingo@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-oyebruc44nlja499nqkr1nzn@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/Documentation/perf-record.txt |  7 ++++++-
 tools/perf/builtin-record.c              |  2 ++
 tools/perf/perf.h                        |  1 +
 tools/perf/util/record.c                 | 20 +++++++++++++++-----
 4 files changed, 24 insertions(+), 6 deletions(-)

diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index 94f2faebc7f0f..cc37b3a4be769 100644
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -191,11 +191,16 @@ OPTIONS
 -i::
 --no-inherit::
 	Child tasks do not inherit counters.
+
 -F::
 --freq=::
 	Profile at this frequency. Use 'max' to use the currently maximum
 	allowed frequency, i.e. the value in the kernel.perf_event_max_sample_rate
-	sysctl.
+	sysctl. Will throttle down to the currently maximum allowed frequency.
+	See --strict-freq.
+
+--strict-freq::
+	Fail if the specified frequency can't be used.
 
 -m::
 --mmap-pages=::
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index e1821eea14ef3..62387942a1d59 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -1543,6 +1543,8 @@ static struct option __record_options[] = {
 	OPT_BOOLEAN(0, "tail-synthesize", &record.opts.tail_synthesize,
 		    "synthesize non-sample events at the end of output"),
 	OPT_BOOLEAN(0, "overwrite", &record.opts.overwrite, "use overwrite mode"),
+	OPT_BOOLEAN(0, "strict-freq", &record.opts.strict_freq,
+		    "Fail if the specified frequency can't be used"),
 	OPT_CALLBACK('F', "freq", &record.opts, "freq or 'max'",
 		     "profile at this frequency",
 		      record__parse_freq),
diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index a5df8bf73a681..007e0dfd5ce3d 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -61,6 +61,7 @@ struct record_opts {
 	bool	     tail_synthesize;
 	bool	     overwrite;
 	bool	     ignore_missing_thread;
+	bool	     strict_freq;
 	unsigned int freq;
 	unsigned int mmap_pages;
 	unsigned int auxtrace_mmap_pages;
diff --git a/tools/perf/util/record.c b/tools/perf/util/record.c
index acabf54ceccb6..4f1a82e76d39d 100644
--- a/tools/perf/util/record.c
+++ b/tools/perf/util/record.c
@@ -216,11 +216,21 @@ static int record_opts__config_freq(struct record_opts *opts)
 	 * User specified frequency is over current maximum.
 	 */
 	if (user_freq && (max_rate < opts->freq)) {
-		pr_err("Maximum frequency rate (%u) reached.\n"
-		   "Please use -F freq option with lower value or consider\n"
-		   "tweaking /proc/sys/kernel/perf_event_max_sample_rate.\n",
-		   max_rate);
-		return -1;
+		if (opts->strict_freq) {
+			pr_err("error: Maximum frequency rate (%'u Hz) exceeded.\n"
+			       "       Please use -F freq option with a lower value or consider\n"
+			       "       tweaking /proc/sys/kernel/perf_event_max_sample_rate.\n",
+			       max_rate);
+			return -1;
+		} else {
+			pr_warning("warning: Maximum frequency rate (%'u Hz) exceeded, throttling from %'u Hz to %'u Hz.\n"
+				   "         The limit can be raised via /proc/sys/kernel/perf_event_max_sample_rate.\n"
+				   "         The kernel will lower it when perf's interrupts take too long.\n"
+				   "         Use --strict-freq to disable this throttling, refusing to record.\n",
+				   max_rate, opts->freq, max_rate);
+
+			opts->freq = max_rate;
+		}
 	}
 
 	/*

From 696703af37a28892db89ff6a6d0cdfde6fb803ab Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Fri, 2 Mar 2018 11:59:36 -0300
Subject: [PATCH 13/28] perf annotate: Find 'call' instruction target symbol at
 parsing time

So that we do it just once, not everytime we press enter or -> on a
'call' instruction line.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-uysyojl1e6nm94amzzzs08tf@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/ui/browsers/annotate.c | 17 ++++----------
 tools/perf/util/annotate.c        | 38 +++++++++++++++++--------------
 tools/perf/util/annotate.h        |  1 +
 3 files changed, 27 insertions(+), 29 deletions(-)

diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
index 6ff6839558b00..618edf96353c4 100644
--- a/tools/perf/ui/browsers/annotate.c
+++ b/tools/perf/ui/browsers/annotate.c
@@ -568,35 +568,28 @@ static bool annotate_browser__callq(struct annotate_browser *browser,
 	struct map_symbol *ms = browser->b.priv;
 	struct disasm_line *dl = disasm_line(browser->selection);
 	struct annotation *notes;
-	struct addr_map_symbol target = {
-		.map = ms->map,
-		.addr = map__objdump_2mem(ms->map, dl->ops.target.addr),
-	};
 	char title[SYM_TITLE_MAX_SIZE];
 
 	if (!ins__is_call(&dl->ins))
 		return false;
 
-	if (map_groups__find_ams(&target) ||
-	    map__rip_2objdump(target.map, target.map->map_ip(target.map,
-							     target.addr)) !=
-	    dl->ops.target.addr) {
+	if (!dl->ops.target.sym) {
 		ui_helpline__puts("The called function was not found.");
 		return true;
 	}
 
-	notes = symbol__annotation(target.sym);
+	notes = symbol__annotation(dl->ops.target.sym);
 	pthread_mutex_lock(&notes->lock);
 
-	if (notes->src == NULL && symbol__alloc_hist(target.sym) < 0) {
+	if (notes->src == NULL && symbol__alloc_hist(dl->ops.target.sym) < 0) {
 		pthread_mutex_unlock(&notes->lock);
 		ui__warning("Not enough memory for annotating '%s' symbol!\n",
-			    target.sym->name);
+			    dl->ops.target.sym->name);
 		return true;
 	}
 
 	pthread_mutex_unlock(&notes->lock);
-	symbol__tui_annotate(target.sym, target.map, evsel, hbt);
+	symbol__tui_annotate(dl->ops.target.sym, ms->map, evsel, hbt);
 	sym_title(ms->sym, ms->map, title, sizeof(title));
 	ui_browser__show_title(&browser->b, title);
 	return true;
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 28b233c3dcbe3..49ff825f745c8 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -187,6 +187,9 @@ bool ins__is_fused(struct arch *arch, const char *ins1, const char *ins2)
 static int call__parse(struct arch *arch, struct ins_operands *ops, struct map *map)
 {
 	char *endptr, *tok, *name;
+	struct addr_map_symbol target = {
+		.map = map,
+	};
 
 	ops->target.addr = strtoull(ops->raw, &endptr, 16);
 
@@ -208,28 +211,29 @@ static int call__parse(struct arch *arch, struct ins_operands *ops, struct map *
 	ops->target.name = strdup(name);
 	*tok = '>';
 
-	return ops->target.name == NULL ? -1 : 0;
+	if (ops->target.name == NULL)
+		return -1;
+find_target:
+	target.addr = map__objdump_2mem(map, ops->target.addr);
 
-indirect_call:
-	tok = strchr(endptr, '*');
-	if (tok == NULL) {
-		struct symbol *sym = map__find_symbol(map, map->map_ip(map, ops->target.addr));
-		if (sym != NULL)
-			ops->target.name = strdup(sym->name);
-		else
-			ops->target.addr = 0;
-		return 0;
-	}
+	if (map_groups__find_ams(&target) == 0 &&
+	    map__rip_2objdump(target.map, map->map_ip(target.map, target.addr)) == ops->target.addr)
+		ops->target.sym = target.sym;
 
-	ops->target.addr = strtoull(tok + 1, NULL, 16);
 	return 0;
+
+indirect_call:
+	tok = strchr(endptr, '*');
+	if (tok != NULL)
+		ops->target.addr = strtoull(tok + 1, NULL, 16);
+	goto find_target;
 }
 
 static int call__scnprintf(struct ins *ins, char *bf, size_t size,
 			   struct ins_operands *ops)
 {
-	if (ops->target.name)
-		return scnprintf(bf, size, "%-6s %s", ins->name, ops->target.name);
+	if (ops->target.sym)
+		return scnprintf(bf, size, "%-6s %s", ins->name, ops->target.sym->name);
 
 	if (ops->target.addr == 0)
 		return ins__raw_scnprintf(ins, bf, size, ops);
@@ -1283,8 +1287,8 @@ static int symbol__parse_objdump_line(struct symbol *sym, FILE *file,
 		dl->ops.target.offset_avail = true;
 	}
 
-	/* kcore has no symbols, so add the call target name */
-	if (dl->ins.ops && ins__is_call(&dl->ins) && !dl->ops.target.name) {
+	/* kcore has no symbols, so add the call target symbol */
+	if (dl->ins.ops && ins__is_call(&dl->ins) && !dl->ops.target.sym) {
 		struct addr_map_symbol target = {
 			.map = map,
 			.addr = dl->ops.target.addr,
@@ -1292,7 +1296,7 @@ static int symbol__parse_objdump_line(struct symbol *sym, FILE *file,
 
 		if (!map_groups__find_ams(&target) &&
 		    target.sym->start == target.al_addr)
-			dl->ops.target.name = strdup(target.sym->name);
+			dl->ops.target.sym = target.sym;
 	}
 
 	annotation_line__add(&dl->al, &notes->src->source);
diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index ce427445671f5..7e914e834101b 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -24,6 +24,7 @@ struct ins_operands {
 	struct {
 		char	*raw;
 		char	*name;
+		struct symbol *sym;
 		u64	addr;
 		s64	offset;
 		bool	offset_avail;

From ad46e48c65fa1f204fa29eaff1b91174d314a94b Mon Sep 17 00:00:00 2001
From: Jiri Olsa <jolsa@kernel.org>
Date: Fri, 2 Mar 2018 17:13:54 +0100
Subject: [PATCH 14/28] perf record: Fix crash in pipe mode

Currently we can crash perf record when running in pipe mode, like:

  $ perf record ls | perf report
  # To display the perf.data header info, please use --header/--header-only options.
  #
  perf: Segmentation fault
  Error:
  The - file has no samples!

The callstack of the crash is:

    0x0000000000515242 in perf_event__synthesize_event_update_name
  3513            ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->id[0]);
  (gdb) bt
  #0  0x0000000000515242 in perf_event__synthesize_event_update_name
  #1  0x00000000005158a4 in perf_event__synthesize_extra_attr
  #2  0x0000000000443347 in record__synthesize
  #3  0x00000000004438e3 in __cmd_record
  #4  0x000000000044514e in cmd_record
  #5  0x00000000004cbc95 in run_builtin
  #6  0x00000000004cbf02 in handle_internal_command
  #7  0x00000000004cc054 in run_argv
  #8  0x00000000004cc422 in main

The reason of the crash is that the evsel does not have ids array
allocated and the pipe's synthesize code tries to access it.

We don't force evsel ids allocation when we have single event, because
it's not needed. However we need it when we are in pipe mode even for
single event as a key for evsel update event.

Fixing this by forcing evsel ids allocation event for single event, when
we are in pipe mode.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180302161354.30192-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-record.c | 9 +++++++++
 tools/perf/perf.h           | 1 +
 tools/perf/util/record.c    | 8 ++++++--
 3 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 62387942a1d59..12230ddb65069 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -882,6 +882,15 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
 		}
 	}
 
+	/*
+	 * If we have just single event and are sending data
+	 * through pipe, we need to force the ids allocation,
+	 * because we synthesize event name through the pipe
+	 * and need the id for that.
+	 */
+	if (data->is_pipe && rec->evlist->nr_entries == 1)
+		rec->opts.sample_id = true;
+
 	if (record__open(rec) != 0) {
 		err = -1;
 		goto out_child;
diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index 007e0dfd5ce3d..8fec1abd0f1fd 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -62,6 +62,7 @@ struct record_opts {
 	bool	     overwrite;
 	bool	     ignore_missing_thread;
 	bool	     strict_freq;
+	bool	     sample_id;
 	unsigned int freq;
 	unsigned int mmap_pages;
 	unsigned int auxtrace_mmap_pages;
diff --git a/tools/perf/util/record.c b/tools/perf/util/record.c
index 4f1a82e76d39d..9cfc7bf165316 100644
--- a/tools/perf/util/record.c
+++ b/tools/perf/util/record.c
@@ -138,6 +138,7 @@ void perf_evlist__config(struct perf_evlist *evlist, struct record_opts *opts,
 	struct perf_evsel *evsel;
 	bool use_sample_identifier = false;
 	bool use_comm_exec;
+	bool sample_id = opts->sample_id;
 
 	/*
 	 * Set the evsel leader links before we configure attributes,
@@ -164,8 +165,7 @@ void perf_evlist__config(struct perf_evlist *evlist, struct record_opts *opts,
 		 * match the id.
 		 */
 		use_sample_identifier = perf_can_sample_identifier();
-		evlist__for_each_entry(evlist, evsel)
-			perf_evsel__set_sample_id(evsel, use_sample_identifier);
+		sample_id = true;
 	} else if (evlist->nr_entries > 1) {
 		struct perf_evsel *first = perf_evlist__first(evlist);
 
@@ -175,6 +175,10 @@ void perf_evlist__config(struct perf_evlist *evlist, struct record_opts *opts,
 			use_sample_identifier = perf_can_sample_identifier();
 			break;
 		}
+		sample_id = true;
+	}
+
+	if (sample_id) {
 		evlist__for_each_entry(evlist, evsel)
 			perf_evsel__set_sample_id(evsel, use_sample_identifier);
 	}

From 53172f9057e92c9b27f0bbf2a46827d87f12b0d2 Mon Sep 17 00:00:00 2001
From: Kan Liang <kan.liang@linux.intel.com>
Date: Thu, 1 Mar 2018 18:08:58 -0500
Subject: [PATCH 15/28] perf kvm: Switch to new perf_mmap__read_event()
 interface

The perf kvm still use the legacy interface.

Switch to the new perf_mmap__read_event() interface for perf kvm.

No functional change.

Committer notes:

Tested before and after running:

  # perf kvm stat record

On a machine with a kvm guest, then used:

  # perf kvm stat report

Before/after results match and look like:

  # perf kvm stat record -a sleep 5
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 2.132 MB perf.data.guest (1828 samples) ]
  # perf kvm stat report

  Analyze events for all VMs, all VCPUs:

             VM-EXIT Samples Samples%  Time% Min Time    Max Time    Avg time

      IO_INSTRUCTION     258   40.06%  0.08%   3.51us    122.54us     14.87us (+- 6.76%)
           MSR_WRITE     178   27.64%  0.01%   0.47us      6.34us      2.18us (+- 4.80%)
       EPT_MISCONFIG     148   22.98%  0.03%   3.76us     65.60us     11.22us (+- 8.14%)
                 HLT      47    7.30% 99.88% 181.69us 249988.06us 102061.36us (+-13.49%)
   PAUSE_INSTRUCTION       5    0.78%  0.00%   0.38us      0.79us      0.47us (+-17.05%)
            MSR_READ       4    0.62%  0.00%   1.14us      3.33us      2.67us (+-19.35%)
  EXTERNAL_INTERRUPT       2    0.31%  0.00%   2.15us      2.17us      2.16us (+- 0.30%)
   PENDING_INTERRUPT       1    0.16%  0.00%   2.56us      2.56us      2.56us (+- 0.00%)
    PREEMPTION_TIMER       1    0.16%  0.00%   3.21us      3.21us      3.21us (+- 0.00%)

  Total Samples:644, Total events handled time:4802790.72us.

  #

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1519945751-37786-1-git-send-email-kan.liang@linux.intel.com
[ Changed bool parameters from 0 to 'false', as per Jiri comment ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-kvm.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 55d919dc5bc63..d2703d3b83666 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -743,16 +743,24 @@ static bool verify_vcpu(int vcpu)
 static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
 				   u64 *mmap_time)
 {
+	struct perf_evlist *evlist = kvm->evlist;
 	union perf_event *event;
+	struct perf_mmap *md;
+	u64 end, start;
 	u64 timestamp;
 	s64 n = 0;
 	int err;
 
 	*mmap_time = ULLONG_MAX;
-	while ((event = perf_evlist__mmap_read(kvm->evlist, idx)) != NULL) {
-		err = perf_evlist__parse_sample_timestamp(kvm->evlist, event, &timestamp);
+	md = &evlist->mmap[idx];
+	err = perf_mmap__read_init(md, false, &start, &end);
+	if (err < 0)
+		return (err == -EAGAIN) ? 0 : -1;
+
+	while ((event = perf_mmap__read_event(md, false, &start, end)) != NULL) {
+		err = perf_evlist__parse_sample_timestamp(evlist, event, &timestamp);
 		if (err) {
-			perf_evlist__mmap_consume(kvm->evlist, idx);
+			perf_mmap__consume(md, false);
 			pr_err("Failed to parse sample\n");
 			return -1;
 		}
@@ -762,7 +770,7 @@ static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
 		 * FIXME: Here we can't consume the event, as perf_session__queue_event will
 		 *        point to it, and it'll get possibly overwritten by the kernel.
 		 */
-		perf_evlist__mmap_consume(kvm->evlist, idx);
+		perf_mmap__consume(md, false);
 
 		if (err) {
 			pr_err("Failed to enqueue sample: %d\n", err);
@@ -779,6 +787,7 @@ static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
 			break;
 	}
 
+	perf_mmap__read_done(md);
 	return n;
 }
 

From d7f55c62e63461c4071afe8730851e406935d960 Mon Sep 17 00:00:00 2001
From: Kan Liang <kan.liang@linux.intel.com>
Date: Thu, 1 Mar 2018 18:08:59 -0500
Subject: [PATCH 16/28] perf trace: Switch to new perf_mmap__read_event()
 interface

The 'perf trace' utility still use the legacy interface.

Switch to the new perf_mmap__read_event() interface.

No functional change.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1519945751-37786-2-git-send-email-kan.liang@linux.intel.com
[ Changed bool parameters from 0 to 'false', as per Jiri comment ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-trace.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index e7f1b182fc153..1a93debc1e8d5 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -2472,8 +2472,14 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
 
 	for (i = 0; i < evlist->nr_mmaps; i++) {
 		union perf_event *event;
+		struct perf_mmap *md;
+		u64 end, start;
 
-		while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
+		md = &evlist->mmap[i];
+		if (perf_mmap__read_init(md, false, &start, &end) < 0)
+			continue;
+
+		while ((event = perf_mmap__read_event(md, false, &start, end)) != NULL) {
 			struct perf_sample sample;
 
 			++trace->nr_events;
@@ -2486,7 +2492,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
 
 			trace__handle_event(trace, event, &sample);
 next_event:
-			perf_evlist__mmap_consume(evlist, i);
+			perf_mmap__consume(md, false);
 
 			if (interrupted)
 				goto out_disable;
@@ -2496,6 +2502,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
 				draining = true;
 			}
 		}
+		perf_mmap__read_done(md);
 	}
 
 	if (trace->nr_events == before) {

From 35b7cdc6379ea8300161f0f80fe8aad083a1c5d0 Mon Sep 17 00:00:00 2001
From: Kan Liang <kan.liang@linux.intel.com>
Date: Thu, 1 Mar 2018 18:09:00 -0500
Subject: [PATCH 17/28] perf python: Switch to new perf_mmap__read_event()
 interface

The perf python binding still use the legacy interface.

No functional change.

Committer notes:

Tested before and after with:

  [root@jouet perf]# export PYTHONPATH=/tmp/build/perf/python
  [root@jouet perf]# tools/perf/python/twatch.py
  cpu: 0, pid: 1183, tid: 6293 { type: exit, pid: 1183, ppid: 1183, tid: 6293, ptid: 6293, time: 17886646588257}
  cpu: 2, pid: 13820, tid: 13820 { type: fork, pid: 13820, ppid: 13820, tid: 6306, ptid: 13820, time: 17886869099529}
  cpu: 1, pid: 13820, tid: 6306 { type: comm, pid: 13820, tid: 6306, comm: TaskSchedulerFo }
  ^CTraceback (most recent call last):
    File "tools/perf/python/twatch.py", line 68, in <module>
      main()
    File "tools/perf/python/twatch.py", line 40, in main
      evlist.poll(timeout = -1)
  KeyboardInterrupt
  [root@jouet perf]#

No problems found.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1519945751-37786-3-git-send-email-kan.liang@linux.intel.com
[ Changed bool parameters from 0 to 'false', as per Jiri comment ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/python.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 2918cac7a1426..35fb5ef7d2901 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -983,13 +983,19 @@ static PyObject *pyrf_evlist__read_on_cpu(struct pyrf_evlist *pevlist,
 	union perf_event *event;
 	int sample_id_all = 1, cpu;
 	static char *kwlist[] = { "cpu", "sample_id_all", NULL };
+	struct perf_mmap *md;
+	u64 end, start;
 	int err;
 
 	if (!PyArg_ParseTupleAndKeywords(args, kwargs, "i|i", kwlist,
 					 &cpu, &sample_id_all))
 		return NULL;
 
-	event = perf_evlist__mmap_read(evlist, cpu);
+	md = &evlist->mmap[cpu];
+	if (perf_mmap__read_init(md, false, &start, &end) < 0)
+		goto end;
+
+	event = perf_mmap__read_event(md, false, &start, end);
 	if (event != NULL) {
 		PyObject *pyevent = pyrf_event__new(event);
 		struct pyrf_event *pevent = (struct pyrf_event *)pyevent;
@@ -1007,14 +1013,14 @@ static PyObject *pyrf_evlist__read_on_cpu(struct pyrf_evlist *pevlist,
 		err = perf_evsel__parse_sample(evsel, event, &pevent->sample);
 
 		/* Consume the even only after we parsed it out. */
-		perf_evlist__mmap_consume(evlist, cpu);
+		perf_mmap__consume(md, false);
 
 		if (err)
 			return PyErr_Format(PyExc_OSError,
 					    "perf: can't parse sample, err=%d", err);
 		return pyevent;
 	}
-
+end:
 	Py_INCREF(Py_None);
 	return Py_None;
 }

From 2f54f3a4733c0cd857992d793af5e8321b281012 Mon Sep 17 00:00:00 2001
From: Kan Liang <kan.liang@linux.intel.com>
Date: Thu, 1 Mar 2018 18:09:01 -0500
Subject: [PATCH 18/28] perf test: Switch to new perf_mmap__read_event()
 interface for bpf

The perf test 'bpf' still use the legacy interface.

No functional change.

Committer notes:

Tested with:

  # perf test bpf
  39: BPF filter                                            :
  39.1: Basic BPF filtering                                 : Ok
  39.2: BPF pinning                                         : Ok
  39.3: BPF prologue generation                             : Ok
  39.4: BPF relocation checker                              : Ok
  #

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1519945751-37786-4-git-send-email-kan.liang@linux.intel.com
[ Changed bool parameters from 0 to 'false', as per Jiri comment ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/bpf.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c
index e8399beca62b3..09c9c9f9e8271 100644
--- a/tools/perf/tests/bpf.c
+++ b/tools/perf/tests/bpf.c
@@ -176,13 +176,20 @@ static int do_test(struct bpf_object *obj, int (*func)(void),
 
 	for (i = 0; i < evlist->nr_mmaps; i++) {
 		union perf_event *event;
+		struct perf_mmap *md;
+		u64 end, start;
 
-		while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
+		md = &evlist->mmap[i];
+		if (perf_mmap__read_init(md, false, &start, &end) < 0)
+			continue;
+
+		while ((event = perf_mmap__read_event(md, false, &start, end)) != NULL) {
 			const u32 type = event->header.type;
 
 			if (type == PERF_RECORD_SAMPLE)
 				count ++;
 		}
+		perf_mmap__read_done(md);
 	}
 
 	if (count != expect) {

From 00fc2460e735fa0f6add802c7426273e7dbc2b27 Mon Sep 17 00:00:00 2001
From: Kan Liang <kan.liang@linux.intel.com>
Date: Thu, 1 Mar 2018 18:09:02 -0500
Subject: [PATCH 19/28] perf test: Switch to new perf_mmap__read_event()
 interface for 'code reading' test

The perf test 'object code reading' still use the legacy interface.

No functional change.

Committer notes:

Testing:

  # perf test reading
  23: Object code reading: Ok
  #

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1519945751-37786-5-git-send-email-kan.liang@linux.intel.com
[ Changed bool parameters from 0 to 'false', as per Jiri comment ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/code-reading.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
index c7115d3695110..03ed8c77b1bb6 100644
--- a/tools/perf/tests/code-reading.c
+++ b/tools/perf/tests/code-reading.c
@@ -409,15 +409,22 @@ static int process_events(struct machine *machine, struct perf_evlist *evlist,
 			  struct state *state)
 {
 	union perf_event *event;
+	struct perf_mmap *md;
+	u64 end, start;
 	int i, ret;
 
 	for (i = 0; i < evlist->nr_mmaps; i++) {
-		while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
+		md = &evlist->mmap[i];
+		if (perf_mmap__read_init(md, false, &start, &end) < 0)
+			continue;
+
+		while ((event = perf_mmap__read_event(md, false, &start, end)) != NULL) {
 			ret = process_event(machine, evlist, event, state);
-			perf_evlist__mmap_consume(evlist, i);
+			perf_mmap__consume(md, false);
 			if (ret < 0)
 				return ret;
 		}
+		perf_mmap__read_done(md);
 	}
 	return 0;
 }

From 693d32aebf857ef1d1803b08ef1b631990ae3747 Mon Sep 17 00:00:00 2001
From: Kan Liang <kan.liang@linux.intel.com>
Date: Thu, 1 Mar 2018 18:09:03 -0500
Subject: [PATCH 20/28] perf test: Switch to new perf_mmap__read_event()
 interface for "keep tracking" test

The perf test 'keep tracking' still use the legacy interface.

No functional change.

Committer testing:

  # perf test tracking
  25: Use a dummy software event to keep tracking           : Ok
  #

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1519945751-37786-6-git-send-email-kan.liang@linux.intel.com
[ Changed bool parameters from 0 to 'false', as per Jiri comment ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/keep-tracking.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/tools/perf/tests/keep-tracking.c b/tools/perf/tests/keep-tracking.c
index c465309189384..4590d8fb91ab8 100644
--- a/tools/perf/tests/keep-tracking.c
+++ b/tools/perf/tests/keep-tracking.c
@@ -27,18 +27,24 @@
 static int find_comm(struct perf_evlist *evlist, const char *comm)
 {
 	union perf_event *event;
+	struct perf_mmap *md;
+	u64 end, start;
 	int i, found;
 
 	found = 0;
 	for (i = 0; i < evlist->nr_mmaps; i++) {
-		while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
+		md = &evlist->mmap[i];
+		if (perf_mmap__read_init(md, false, &start, &end) < 0)
+			continue;
+		while ((event = perf_mmap__read_event(md, false, &start, end)) != NULL) {
 			if (event->header.type == PERF_RECORD_COMM &&
 			    (pid_t)event->comm.pid == getpid() &&
 			    (pid_t)event->comm.tid == getpid() &&
 			    strcmp(event->comm.comm, comm) == 0)
 				found += 1;
-			perf_evlist__mmap_consume(evlist, i);
+			perf_mmap__consume(md, false);
 		}
+		perf_mmap__read_done(md);
 	}
 	return found;
 }

From 334f823e2ab58b3c0e58fa71321680382c5f60ff Mon Sep 17 00:00:00 2001
From: Kan Liang <kan.liang@linux.intel.com>
Date: Thu, 1 Mar 2018 18:09:04 -0500
Subject: [PATCH 21/28] perf test: Switch to new perf_mmap__read_event()
 interface for mmap-basic

The perf test 'mmap-basic' still use the legacy interface.

No functional change.

Committer notes:

Testing it:

  # perf test "mmap interface"
   4: Read samples using the mmap interface                 : Ok
  #

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1519945751-37786-7-git-send-email-kan.liang@linux.intel.com
[ Changed bool parameters from 0 to 'false', as per Jiri comment ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/mmap-basic.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c
index c0e971da965cc..44c58d69cd87e 100644
--- a/tools/perf/tests/mmap-basic.c
+++ b/tools/perf/tests/mmap-basic.c
@@ -38,6 +38,8 @@ int test__basic_mmap(struct test *test __maybe_unused, int subtest __maybe_unuse
 		     expected_nr_events[nsyscalls], i, j;
 	struct perf_evsel *evsels[nsyscalls], *evsel;
 	char sbuf[STRERR_BUFSIZE];
+	struct perf_mmap *md;
+	u64 end, start;
 
 	threads = thread_map__new(-1, getpid(), UINT_MAX);
 	if (threads == NULL) {
@@ -106,7 +108,11 @@ int test__basic_mmap(struct test *test __maybe_unused, int subtest __maybe_unuse
 			++foo;
 		}
 
-	while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) {
+	md = &evlist->mmap[0];
+	if (perf_mmap__read_init(md, false, &start, &end) < 0)
+		goto out_init;
+
+	while ((event = perf_mmap__read_event(md, false, &start, end)) != NULL) {
 		struct perf_sample sample;
 
 		if (event->header.type != PERF_RECORD_SAMPLE) {
@@ -129,9 +135,11 @@ int test__basic_mmap(struct test *test __maybe_unused, int subtest __maybe_unuse
 			goto out_delete_evlist;
 		}
 		nr_events[evsel->idx]++;
-		perf_evlist__mmap_consume(evlist, 0);
+		perf_mmap__consume(md, false);
 	}
+	perf_mmap__read_done(md);
 
+out_init:
 	err = 0;
 	evlist__for_each_entry(evlist, evsel) {
 		if (nr_events[evsel->idx] != expected_nr_events[evsel->idx]) {

From 1d1b5632ed0b797721a409bbed718d85384168a2 Mon Sep 17 00:00:00 2001
From: Kan Liang <kan.liang@linux.intel.com>
Date: Thu, 1 Mar 2018 18:09:05 -0500
Subject: [PATCH 22/28] perf test: Switch to new perf_mmap__read_event()
 interface for tp fields

The perf test 'syscalls:sys_enter_openat event fields' still use the
legacy interface.

No functional change.

Committer notes:

Testing it:

  # perf test sys_enter_openat
  15: syscalls:sys_enter_openat event fields                : Ok
  #

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1519945751-37786-8-git-send-email-kan.liang@linux.intel.com
[ Changed bool parameters from 0 to 'false', as per Jiri comment ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/openat-syscall-tp-fields.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/tools/perf/tests/openat-syscall-tp-fields.c b/tools/perf/tests/openat-syscall-tp-fields.c
index 43519267b93ba..620b21023f722 100644
--- a/tools/perf/tests/openat-syscall-tp-fields.c
+++ b/tools/perf/tests/openat-syscall-tp-fields.c
@@ -86,8 +86,14 @@ int test__syscall_openat_tp_fields(struct test *test __maybe_unused, int subtest
 
 		for (i = 0; i < evlist->nr_mmaps; i++) {
 			union perf_event *event;
+			struct perf_mmap *md;
+			u64 end, start;
 
-			while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
+			md = &evlist->mmap[i];
+			if (perf_mmap__read_init(md, false, &start, &end) < 0)
+				continue;
+
+			while ((event = perf_mmap__read_event(md, false, &start, end)) != NULL) {
 				const u32 type = event->header.type;
 				int tp_flags;
 				struct perf_sample sample;
@@ -95,7 +101,7 @@ int test__syscall_openat_tp_fields(struct test *test __maybe_unused, int subtest
 				++nr_events;
 
 				if (type != PERF_RECORD_SAMPLE) {
-					perf_evlist__mmap_consume(evlist, i);
+					perf_mmap__consume(md, false);
 					continue;
 				}
 
@@ -115,6 +121,7 @@ int test__syscall_openat_tp_fields(struct test *test __maybe_unused, int subtest
 
 				goto out_ok;
 			}
+			perf_mmap__read_done(md);
 		}
 
 		if (nr_events == before)

From 88e37a4bbe6e05fd5ad103738c542658b81e76ea Mon Sep 17 00:00:00 2001
From: Kan Liang <kan.liang@linux.intel.com>
Date: Thu, 1 Mar 2018 18:09:06 -0500
Subject: [PATCH 23/28] perf test: Switch to new perf_mmap__read_event()
 interface for perf-record

The perf test 'perf-record' still use the legacy interface.

No functional change.

Committer notes:

Testing it:

  # perf test PERF_RECORD
   8: PERF_RECORD_* events & perf_sample fields             : Ok
  #

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1519945751-37786-9-git-send-email-kan.liang@linux.intel.com
[ Changed bool parameters from 0 to 'false', as per Jiri comment ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/perf-record.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
index 0afafab852382..31f3f70adca62 100644
--- a/tools/perf/tests/perf-record.c
+++ b/tools/perf/tests/perf-record.c
@@ -164,8 +164,14 @@ int test__PERF_RECORD(struct test *test __maybe_unused, int subtest __maybe_unus
 
 		for (i = 0; i < evlist->nr_mmaps; i++) {
 			union perf_event *event;
+			struct perf_mmap *md;
+			u64 end, start;
 
-			while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
+			md = &evlist->mmap[i];
+			if (perf_mmap__read_init(md, false, &start, &end) < 0)
+				continue;
+
+			while ((event = perf_mmap__read_event(md, false, &start, end)) != NULL) {
 				const u32 type = event->header.type;
 				const char *name = perf_event__name(type);
 
@@ -266,8 +272,9 @@ int test__PERF_RECORD(struct test *test __maybe_unused, int subtest __maybe_unus
 					++errs;
 				}
 
-				perf_evlist__mmap_consume(evlist, i);
+				perf_mmap__consume(md, false);
 			}
+			perf_mmap__read_done(md);
 		}
 
 		/*

From 9dfb85dfaffe6bc38f0c9f8a8622e2a7ca333e58 Mon Sep 17 00:00:00 2001
From: Kan Liang <kan.liang@linux.intel.com>
Date: Thu, 1 Mar 2018 18:09:07 -0500
Subject: [PATCH 24/28] perf test: Switch to new perf_mmap__read_event()
 interface for time-to-tsc

The perf test 'time-to-tsc' still use the legacy interface.

No functional change.

Commiter notes:

Testing it:

  # perf test tsc
  57: Convert perf time to TSC                              : Ok
  #

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1519945751-37786-10-git-send-email-kan.liang@linux.intel.com
[ Changed bool parameters from 0 to 'false', as per Jiri comment ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/arch/x86/tests/perf-time-to-tsc.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/tools/perf/arch/x86/tests/perf-time-to-tsc.c b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
index 06abe8108b33c..7f82d91ef473e 100644
--- a/tools/perf/arch/x86/tests/perf-time-to-tsc.c
+++ b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
@@ -60,6 +60,8 @@ int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest __maybe
 	union perf_event *event;
 	u64 test_tsc, comm1_tsc, comm2_tsc;
 	u64 test_time, comm1_time = 0, comm2_time = 0;
+	struct perf_mmap *md;
+	u64 end, start;
 
 	threads = thread_map__new(-1, getpid(), UINT_MAX);
 	CHECK_NOT_NULL__(threads);
@@ -109,7 +111,11 @@ int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest __maybe
 	perf_evlist__disable(evlist);
 
 	for (i = 0; i < evlist->nr_mmaps; i++) {
-		while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
+		md = &evlist->mmap[i];
+		if (perf_mmap__read_init(md, false, &start, &end) < 0)
+			continue;
+
+		while ((event = perf_mmap__read_event(md, false, &start, end)) != NULL) {
 			struct perf_sample sample;
 
 			if (event->header.type != PERF_RECORD_COMM ||
@@ -128,8 +134,9 @@ int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest __maybe
 				comm2_time = sample.time;
 			}
 next_event:
-			perf_evlist__mmap_consume(evlist, i);
+			perf_mmap__consume(md, false);
 		}
+		perf_mmap__read_done(md);
 	}
 
 	if (!comm1_time || !comm2_time)

From 5d0007cdfc6612788badceb276156d6ccb30b6de Mon Sep 17 00:00:00 2001
From: Kan Liang <kan.liang@linux.intel.com>
Date: Thu, 1 Mar 2018 18:09:08 -0500
Subject: [PATCH 25/28] perf test: Switch to new perf_mmap__read_event()
 interface for sw-clock

The perf test 'sw-clock' still use the legacy interface.

No functional change.

Committer testing:

  # perf test clock
  22: Software clock events period values                   : Ok
  #

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1519945751-37786-11-git-send-email-kan.liang@linux.intel.com
[ Changed bool parameters from 0 to 'false', as per Jiri comment ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/sw-clock.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/tools/perf/tests/sw-clock.c b/tools/perf/tests/sw-clock.c
index f6c72f915d480..e6320e267ba56 100644
--- a/tools/perf/tests/sw-clock.c
+++ b/tools/perf/tests/sw-clock.c
@@ -39,6 +39,8 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
 	};
 	struct cpu_map *cpus;
 	struct thread_map *threads;
+	struct perf_mmap *md;
+	u64 end, start;
 
 	attr.sample_freq = 500;
 
@@ -93,7 +95,11 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
 
 	perf_evlist__disable(evlist);
 
-	while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) {
+	md = &evlist->mmap[0];
+	if (perf_mmap__read_init(md, false, &start, &end) < 0)
+		goto out_init;
+
+	while ((event = perf_mmap__read_event(md, false, &start, end)) != NULL) {
 		struct perf_sample sample;
 
 		if (event->header.type != PERF_RECORD_SAMPLE)
@@ -108,9 +114,11 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
 		total_periods += sample.period;
 		nr_samples++;
 next_event:
-		perf_evlist__mmap_consume(evlist, 0);
+		perf_mmap__consume(md, false);
 	}
+	perf_mmap__read_done(md);
 
+out_init:
 	if ((u64) nr_samples == total_periods) {
 		pr_debug("All (%d) samples have period value of 1!\n",
 			 nr_samples);

From ee4024ff858211316c4824b16bea446f08765ae8 Mon Sep 17 00:00:00 2001
From: Kan Liang <kan.liang@linux.intel.com>
Date: Thu, 1 Mar 2018 18:09:09 -0500
Subject: [PATCH 26/28] perf test: Switch to new perf_mmap__read_event()
 interface for switch-tracking

The perf test 'switch-tracking' still use the legacy interface.

No functional change.

Committer testing:

  # perf test switch
  32: Track with sched_switch                               : Ok
  #

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1519945751-37786-12-git-send-email-kan.liang@linux.intel.com
[ Changed bool parameters from 0 to 'false', as per Jiri comment ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/switch-tracking.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/tools/perf/tests/switch-tracking.c b/tools/perf/tests/switch-tracking.c
index 33e00295a972a..10c4dcdc2324a 100644
--- a/tools/perf/tests/switch-tracking.c
+++ b/tools/perf/tests/switch-tracking.c
@@ -258,16 +258,23 @@ static int process_events(struct perf_evlist *evlist,
 	unsigned pos, cnt = 0;
 	LIST_HEAD(events);
 	struct event_node *events_array, *node;
+	struct perf_mmap *md;
+	u64 end, start;
 	int i, ret;
 
 	for (i = 0; i < evlist->nr_mmaps; i++) {
-		while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
+		md = &evlist->mmap[i];
+		if (perf_mmap__read_init(md, false, &start, &end) < 0)
+			continue;
+
+		while ((event = perf_mmap__read_event(md, false, &start, end)) != NULL) {
 			cnt += 1;
 			ret = add_event(evlist, &events, event);
-			perf_evlist__mmap_consume(evlist, i);
+			 perf_mmap__consume(md, false);
 			if (ret < 0)
 				goto out_free_nodes;
 		}
+		perf_mmap__read_done(md);
 	}
 
 	events_array = calloc(cnt, sizeof(struct event_node));

From 759487307625cd44ac4aa241ee547b52b72bc4ad Mon Sep 17 00:00:00 2001
From: Kan Liang <kan.liang@linux.intel.com>
Date: Thu, 1 Mar 2018 18:09:10 -0500
Subject: [PATCH 27/28] perf test: Switch to new perf_mmap__read_event()
 interface for task-exit

The perf test 'task-exit' still use the legacy interface.

No functional change.

Committer notes:

Testing it:

  # perf test exit
  21: Number of exit events of a simple workload            : Ok
  #

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1519945751-37786-13-git-send-email-kan.liang@linux.intel.com
[ Changed bool parameters from 0 to 'false', as per Jiri comment ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/task-exit.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c
index 01b62b81751b6..02b0888b72a33 100644
--- a/tools/perf/tests/task-exit.c
+++ b/tools/perf/tests/task-exit.c
@@ -47,6 +47,8 @@ int test__task_exit(struct test *test __maybe_unused, int subtest __maybe_unused
 	char sbuf[STRERR_BUFSIZE];
 	struct cpu_map *cpus;
 	struct thread_map *threads;
+	struct perf_mmap *md;
+	u64 end, start;
 
 	signal(SIGCHLD, sig_handler);
 
@@ -110,13 +112,19 @@ int test__task_exit(struct test *test __maybe_unused, int subtest __maybe_unused
 	perf_evlist__start_workload(evlist);
 
 retry:
-	while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) {
+	md = &evlist->mmap[0];
+	if (perf_mmap__read_init(md, false, &start, &end) < 0)
+		goto out_init;
+
+	while ((event = perf_mmap__read_event(md, false, &start, end)) != NULL) {
 		if (event->header.type == PERF_RECORD_EXIT)
 			nr_exit++;
 
-		perf_evlist__mmap_consume(evlist, 0);
+		perf_mmap__consume(md, false);
 	}
+	perf_mmap__read_done(md);
 
+out_init:
 	if (!exited || !nr_exit) {
 		perf_evlist__poll(evlist, -1);
 		goto retry;

From 6afad54d2f0ddebacfcf3b829147d7fed8dab298 Mon Sep 17 00:00:00 2001
From: Kan Liang <kan.liang@linux.intel.com>
Date: Thu, 1 Mar 2018 18:09:11 -0500
Subject: [PATCH 28/28] perf mmap: Discard legacy interfaces for mmap read
 forward

Discards legacy interfaces perf_evlist__mmap_read_forward(),
perf_evlist__mmap_read() and perf_evlist__mmap_consume().

No tools use them.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1519945751-37786-14-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/evlist.c | 25 +------------------------
 tools/perf/util/evlist.h |  4 ----
 tools/perf/util/mmap.c   | 21 +--------------------
 3 files changed, 2 insertions(+), 48 deletions(-)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 7b7d535396f7a..41a4666f1519b 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -702,29 +702,6 @@ static int perf_evlist__resume(struct perf_evlist *evlist)
 	return perf_evlist__set_paused(evlist, false);
 }
 
-union perf_event *perf_evlist__mmap_read_forward(struct perf_evlist *evlist, int idx)
-{
-	struct perf_mmap *md = &evlist->mmap[idx];
-
-	/*
-	 * Check messup is required for forward overwritable ring buffer:
-	 * memory pointed by md->prev can be overwritten in this case.
-	 * No need for read-write ring buffer: kernel stop outputting when
-	 * it hit md->prev (perf_mmap__consume()).
-	 */
-	return perf_mmap__read_forward(md);
-}
-
-union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx)
-{
-	return perf_evlist__mmap_read_forward(evlist, idx);
-}
-
-void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx)
-{
-	perf_mmap__consume(&evlist->mmap[idx], false);
-}
-
 static void perf_evlist__munmap_nofree(struct perf_evlist *evlist)
 {
 	int i;
@@ -761,7 +738,7 @@ static struct perf_mmap *perf_evlist__alloc_mmap(struct perf_evlist *evlist)
 		map[i].fd = -1;
 		/*
 		 * When the perf_mmap() call is made we grab one refcount, plus
-		 * one extra to let perf_evlist__mmap_consume() get the last
+		 * one extra to let perf_mmap__consume() get the last
 		 * events after all real references (perf_mmap__get()) are
 		 * dropped.
 		 *
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 336b838e6957e..6c41b2f787139 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -129,10 +129,6 @@ struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id);
 
 void perf_evlist__toggle_bkw_mmap(struct perf_evlist *evlist, enum bkw_mmap_state state);
 
-union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx);
-
-union perf_event *perf_evlist__mmap_read_forward(struct perf_evlist *evlist,
-						 int idx);
 void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx);
 
 int perf_evlist__open(struct perf_evlist *evlist);
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index 91531a7c8fbf3..4f27c464ce0b9 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -63,25 +63,6 @@ static union perf_event *perf_mmap__read(struct perf_mmap *map,
 	return event;
 }
 
-/*
- * legacy interface for mmap read.
- * Don't use it. Use perf_mmap__read_event().
- */
-union perf_event *perf_mmap__read_forward(struct perf_mmap *map)
-{
-	u64 head;
-
-	/*
-	 * Check if event was unmapped due to a POLLHUP/POLLERR.
-	 */
-	if (!refcount_read(&map->refcnt))
-		return NULL;
-
-	head = perf_mmap__read_head(map);
-
-	return perf_mmap__read(map, &map->prev, head);
-}
-
 /*
  * Read event from ring buffer one by one.
  * Return one event for each call.
@@ -191,7 +172,7 @@ void perf_mmap__munmap(struct perf_mmap *map)
 int perf_mmap__mmap(struct perf_mmap *map, struct mmap_params *mp, int fd)
 {
 	/*
-	 * The last one will be done at perf_evlist__mmap_consume(), so that we
+	 * The last one will be done at perf_mmap__consume(), so that we
 	 * make sure we don't prevent tools from consuming every last event in
 	 * the ring buffer.
 	 *