Merge tag 'perf-core-for-mingo-20160330' of git://git.kernel.org/pub/…

…scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes:

User visible changes:

  - Add support for skipping itrace instructions, useful to fast forward
    processor trace (Intel PT, BTS) to right after initialization code at the start
    of a workload (Andi Kleen)

  - Add support for backtraces in perl 'perf script's (Dima Kogan)

  - Add -U/-K (--all-user/--all-kernel) options to 'perf mem' (Jiri Olsa)

  - Make -f/--force option documentation consistent across tools (Jiri Olsa)

Infrastructure changes:

  - Add 'perf test' to check for event times (Jiri Olsa)

  - 'perf config' cleanups (Taeung Song)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

tools/perf/Documentation/intel-pt.txt

@@ -672,6 +672,7 @@ The letters are:
 	d	create a debug log
 	g	synthesize a call chain (use with i or x)
 	l	synthesize last branch entries (use with i or x)
+	s	skip initial number of events
 
 "Instructions" events look like they were recorded by "perf record -e
 instructions".
@@ -730,6 +731,12 @@ from one sample to the next.
 
 To disable trace decoding entirely, use the option --no-itrace.
 
+It is also possible to skip events generated (instructions, branches, transactions)
+at the beginning. This is useful to ignore initialization code.
+
+	--itrace=i0nss1000000
+
+skips the first million instructions.
 
 dump option
 -----------

tools/perf/Documentation/itrace.txt

@@ -7,6 +7,7 @@
 		d	create a debug log
 		g	synthesize a call chain (use with i or x)
 		l	synthesize last branch entries (use with i or x)
+		s       skip initial number of events
 
 	The default is all events i.e. the same as --itrace=ibxe
 
@@ -24,3 +25,10 @@
 
 	Also the number of last branch entries (default 64, max. 1024) for
 	instructions or transactions events can be specified.
+
+	It is also possible to skip events generated (instructions, branches, transactions)
+	at the beginning. This is useful to ignore initialization code.
+
+	--itrace=i0nss1000000
+
+	skips the first million instructions.

tools/perf/Documentation/perf-annotate.txt

@@ -33,7 +33,7 @@ OPTIONS
 
 -f::
 --force::
-        Don't complain, do it.
+        Don't do ownership validation.
 
 -v::
 --verbose::

tools/perf/Documentation/perf-diff.txt

@@ -75,7 +75,7 @@ OPTIONS
 
 -f::
 --force::
-       Don't complain, do it.
+        Don't do ownership validation.
 
 --symfs=<directory>::
         Look for files with symbols relative to this directory.

tools/perf/Documentation/perf-mem.txt

@@ -48,6 +48,14 @@ OPTIONS
 	option can be passed in record mode. It will be interpreted the same way as perf
 	record.
 
+-K::
+--all-kernel::
+	Configure all used events to run in kernel space.
+
+-U::
+--all-user::
+	Configure all used events to run in user space.
+
 SEE ALSO
 --------
 linkperf:perf-record[1], linkperf:perf-report[1]

tools/perf/Documentation/perf-report.txt

@@ -285,7 +285,7 @@ OPTIONS
 
 -f::
 --force::
-        Don't complain, do it.
+        Don't do ownership validation.
 
 --symfs=<directory>::
         Look for files with symbols relative to this directory.

tools/perf/Documentation/perf-script.txt

@@ -262,6 +262,10 @@ include::itrace.txt[]
 --ns::
 	Use 9 decimal places when displaying time (i.e. show the nanoseconds)
 
+-f::
+--force::
+	Don't do ownership validation.
+
 SEE ALSO
 --------
 linkperf:perf-record[1], linkperf:perf-script-perl[1],

tools/perf/builtin-mem.c

@@ -62,19 +62,22 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
 	int rec_argc, i = 0, j;
 	const char **rec_argv;
 	int ret;
+	bool all_user = false, all_kernel = false;
 	struct option options[] = {
 	OPT_CALLBACK('e', "event", &mem, "event",
 		     "event selector. use 'perf mem record -e list' to list available events",
 		     parse_record_events),
 	OPT_INCR('v', "verbose", &verbose,
 		 "be more verbose (show counter open errors, etc)"),
+	OPT_BOOLEAN('U', "--all-user", &all_user, "collect only user level data"),
+	OPT_BOOLEAN('K', "--all-kernel", &all_kernel, "collect only kernel level data"),
 	OPT_END()
 	};
 
 	argc = parse_options(argc, argv, options, record_mem_usage,
 			     PARSE_OPT_STOP_AT_NON_OPTION);
 
-	rec_argc = argc + 7; /* max number of arguments */
+	rec_argc = argc + 9; /* max number of arguments */
 	rec_argv = calloc(rec_argc + 1, sizeof(char *));
 	if (!rec_argv)
 		return -1;
@@ -103,6 +106,12 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
 		rec_argv[i++] = perf_mem_events__name(j);
 	};
 
+	if (all_user)
+		rec_argv[i++] = "--all-user";
+
+	if (all_kernel)
+		rec_argv[i++] = "--all-kernel";
+
 	for (j = 0; j < argc; j++, i++)
 		rec_argv[i] = argv[j];
 

tools/perf/perf.c

@@ -549,6 +549,7 @@ int main(int argc, const char **argv)
 	srandom(time(NULL));
 
 	perf_config(perf_default_config, NULL);
+	set_buildid_dir(NULL);
 
 	/* get debugfs/tracefs mount point from /proc/mounts */
 	tracing_path_mount();
@@ -572,7 +573,6 @@ int main(int argc, const char **argv)
 	}
 	if (!prefixcmp(cmd, "trace")) {
 #ifdef HAVE_LIBAUDIT_SUPPORT
-		set_buildid_dir(NULL);
 		setup_path();
 		argv[0] = "trace";
 		return cmd_trace(argc, argv, NULL);
@@ -587,7 +587,6 @@ int main(int argc, const char **argv)
 	argc--;
 	handle_options(&argv, &argc, NULL);
 	commit_pager_choice();
-	set_buildid_dir(NULL);
 
 	if (argc > 0) {
 		if (!prefixcmp(argv[0], "--"))

tools/perf/tests/Build

@@ -37,6 +37,7 @@ perf-y += topology.o
 perf-y += cpumap.o
 perf-y += stat.o
 perf-y += event_update.o
+perf-y += event-times.o
 
 $(OUTPUT)tests/llvm-src-base.c: tests/bpf-script-example.c tests/Build
 	$(call rule_mkdir)

tools/perf/tests/builtin-test.c

@@ -203,6 +203,10 @@ static struct test generic_tests[] = {
 		.desc = "Test attr update synthesize",
 		.func = test__event_update,
 	},
+	{
+		.desc = "Test events times",
+		.func = test__event_times,
+	},
 	{
 		.func = NULL,
 	},