---

yaml
---
r: 169784
b: refs/heads/master
c: 9533ac6
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 75ec29ab848a7e92a41aaafaeb33d1afbc839be4
+refs/heads/master: 9533ac6291d78cd16c4b11a15bfbb055affd76c3

trunk/arch/x86/kernel/cpu/perf_event.c

@@ -2229,10 +2229,10 @@ validate_event(struct cpu_hw_events *cpuc, struct perf_event *event)
 {
 	struct hw_perf_event fake_event = event->hw;
 
-	if (event->pmu != &pmu)
+	if (event->pmu && event->pmu != &pmu)
 		return 0;
 
-	return x86_schedule_event(cpuc, &fake_event);
+	return x86_schedule_event(cpuc, &fake_event) >= 0;
 }
 
 static int validate_group(struct perf_event *event)

trunk/kernel/perf_event.c

@@ -1831,7 +1831,7 @@ static int perf_event_read_group(struct perf_event *event,
 
 		size = n * sizeof(u64);
 
-		if (copy_to_user(buf + size, values, size)) {
+		if (copy_to_user(buf + ret, values, size)) {
 			ret = -EFAULT;
 			goto unlock;
 		}
@@ -3914,7 +3914,7 @@ void perf_swevent_put_recursion_context(int rctx)
 {
 	struct perf_cpu_context *cpuctx = &__get_cpu_var(perf_cpu_context);
 	barrier();
-	cpuctx->recursion[rctx]++;
+	cpuctx->recursion[rctx]--;
 	put_cpu_var(perf_cpu_context);
 }
 EXPORT_SYMBOL_GPL(perf_swevent_put_recursion_context);

trunk/tools/perf/.gitignore

@@ -12,6 +12,7 @@ perf*.1
 perf*.xml
 perf*.html
 common-cmds.h
+perf.data
 tags
 TAGS
 cscope*

trunk/tools/perf/Documentation/perf-kmem.txt

@@ -0,0 +1,44 @@
+perf-kmem(1)
+==============
+
+NAME
+----
+perf-kmem - Tool to trace/measure kernel memory(slab) properties
+
+SYNOPSIS
+--------
+[verse]
+'perf kmem' {record} [<options>]
+
+DESCRIPTION
+-----------
+There's two variants of perf kmem:
+
+  'perf kmem record <command>' to record the kmem events
+  of an arbitrary workload.
+
+  'perf kmem' to report kernel memory statistics.
+
+OPTIONS
+-------
+-i <file>::
+--input=<file>::
+	Select the input file (default: perf.data)
+
+--stat=<caller|alloc>::
+	Select per callsite or per allocation statistics
+
+-s <key[,key2...]>::
+--sort=<key[,key2...]>::
+	Sort the output (default: frag,hit,bytes)
+
+-l <num>::
+--line=<num>::
+	Print n lines only
+
+--raw-ip::
+	Print raw ip instead of symbol
+
+SEE ALSO
+--------
+linkperf:perf-record[1]

trunk/tools/perf/Makefile

@@ -369,6 +369,7 @@ LIB_H += util/sort.h
 LIB_H += util/hist.h
 LIB_H += util/thread.h
 LIB_H += util/data_map.h
+LIB_H += util/process_events.h
 
 LIB_OBJS += util/abspath.o
 LIB_OBJS += util/alias.o
@@ -411,6 +412,7 @@ LIB_OBJS += util/svghelper.o
 LIB_OBJS += util/sort.o
 LIB_OBJS += util/hist.o
 LIB_OBJS += util/data_map.o
+LIB_OBJS += util/process_events.o
 
 BUILTIN_OBJS += builtin-annotate.o
 
@@ -419,6 +421,7 @@ BUILTIN_OBJS += builtin-bench.o
 # Benchmark modules
 BUILTIN_OBJS += bench/sched-messaging.o
 BUILTIN_OBJS += bench/sched-pipe.o
+BUILTIN_OBJS += bench/mem-memcpy.o
 
 BUILTIN_OBJS += builtin-help.o
 BUILTIN_OBJS += builtin-sched.o

trunk/tools/perf/bench/bench.h

@@ -3,6 +3,7 @@
 
 extern int bench_sched_messaging(int argc, const char **argv, const char *prefix);
 extern int bench_sched_pipe(int argc, const char **argv, const char *prefix);
+extern int bench_mem_memcpy(int argc, const char **argv, const char *prefix __used);
 
 #define BENCH_FORMAT_DEFAULT_STR	"default"
 #define BENCH_FORMAT_DEFAULT		0

trunk/tools/perf/bench/mem-memcpy.c

@@ -0,0 +1,193 @@
+/*
+ * mem-memcpy.c
+ *
+ * memcpy: Simple memory copy in various ways
+ *
+ * Written by Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
+ */
+#include <ctype.h>
+
+#include "../perf.h"
+#include "../util/util.h"
+#include "../util/parse-options.h"
+#include "../util/string.h"
+#include "../util/header.h"
+#include "bench.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+#include <errno.h>
+
+#define K 1024
+
+static const char	*length_str	= "1MB";
+static const char	*routine	= "default";
+static int		use_clock	= 0;
+static int		clock_fd;
+
+static const struct option options[] = {
+	OPT_STRING('l', "length", &length_str, "1MB",
+		    "Specify length of memory to copy. "
+		    "available unit: B, MB, GB (upper and lower)"),
+	OPT_STRING('r', "routine", &routine, "default",
+		    "Specify routine to copy"),
+	OPT_BOOLEAN('c', "clock", &use_clock,
+		    "Use CPU clock for measuring"),
+	OPT_END()
+};
+
+struct routine {
+	const char *name;
+	const char *desc;
+	void * (*fn)(void *dst, const void *src, size_t len);
+};
+
+struct routine routines[] = {
+	{ "default",
+	  "Default memcpy() provided by glibc",
+	  memcpy },
+	{ NULL,
+	  NULL,
+	  NULL   }
+};
+
+static const char * const bench_mem_memcpy_usage[] = {
+	"perf bench mem memcpy <options>",
+	NULL
+};
+
+static struct perf_event_attr clock_attr = {
+	.type		= PERF_TYPE_HARDWARE,
+	.config		= PERF_COUNT_HW_CPU_CYCLES
+};
+
+static void init_clock(void)
+{
+	clock_fd = sys_perf_event_open(&clock_attr, getpid(), -1, -1, 0);
+
+	if (clock_fd < 0 && errno == ENOSYS)
+		die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
+	else
+		BUG_ON(clock_fd < 0);
+}
+
+static u64 get_clock(void)
+{
+	int ret;
+	u64 clk;
+
+	ret = read(clock_fd, &clk, sizeof(u64));
+	BUG_ON(ret != sizeof(u64));
+
+	return clk;
+}
+
+static double timeval2double(struct timeval *ts)
+{
+	return (double)ts->tv_sec +
+		(double)ts->tv_usec / (double)1000000;
+}
+
+int bench_mem_memcpy(int argc, const char **argv,
+		     const char *prefix __used)
+{
+	int i;
+	void *dst, *src;
+	size_t length;
+	double bps = 0.0;
+	struct timeval tv_start, tv_end, tv_diff;
+	u64 clock_start, clock_end, clock_diff;
+
+	clock_start = clock_end = clock_diff = 0ULL;
+	argc = parse_options(argc, argv, options,
+			     bench_mem_memcpy_usage, 0);
+
+	tv_diff.tv_sec = 0;
+	tv_diff.tv_usec = 0;
+	length = (size_t)perf_atoll((char *)length_str);
+
+	if ((s64)length <= 0) {
+		fprintf(stderr, "Invalid length:%s\n", length_str);
+		return 1;
+	}
+
+	for (i = 0; routines[i].name; i++) {
+		if (!strcmp(routines[i].name, routine))
+			break;
+	}
+	if (!routines[i].name) {
+		printf("Unknown routine:%s\n", routine);
+		printf("Available routines...\n");
+		for (i = 0; routines[i].name; i++) {
+			printf("\t%s ... %s\n",
+			       routines[i].name, routines[i].desc);
+		}
+		return 1;
+	}
+
+	dst = zalloc(length);
+	if (!dst)
+		die("memory allocation failed - maybe length is too large?\n");
+
+	src = zalloc(length);
+	if (!src)
+		die("memory allocation failed - maybe length is too large?\n");
+
+	if (bench_format == BENCH_FORMAT_DEFAULT) {
+		printf("# Copying %s Bytes from %p to %p ...\n\n",
+		       length_str, src, dst);
+	}
+
+	if (use_clock) {
+		init_clock();
+		clock_start = get_clock();
+	} else {
+		BUG_ON(gettimeofday(&tv_start, NULL));
+	}
+
+	routines[i].fn(dst, src, length);
+
+	if (use_clock) {
+		clock_end = get_clock();
+		clock_diff = clock_end - clock_start;
+	} else {
+		BUG_ON(gettimeofday(&tv_end, NULL));
+		timersub(&tv_end, &tv_start, &tv_diff);
+		bps = (double)((double)length / timeval2double(&tv_diff));
+	}
+
+	switch (bench_format) {
+	case BENCH_FORMAT_DEFAULT:
+		if (use_clock) {
+			printf(" %14lf Clock/Byte\n",
+			       (double)clock_diff / (double)length);
+		} else {
+			if (bps < K)
+				printf(" %14lf B/Sec\n", bps);
+			else if (bps < K * K)
+				printf(" %14lfd KB/Sec\n", bps / 1024);
+			else if (bps < K * K * K)
+				printf(" %14lf MB/Sec\n", bps / 1024 / 1024);
+			else {
+				printf(" %14lf GB/Sec\n",
+				       bps / 1024 / 1024 / 1024);
+			}
+		}
+		break;
+	case BENCH_FORMAT_SIMPLE:
+		if (use_clock) {
+			printf("%14lf\n",
+			       (double)clock_diff / (double)length);
+		} else
+			printf("%lf\n", bps);
+		break;
+	default:
+		/* reaching this means there's some disaster: */
+		die("unknown format: %d\n", bench_format);
+		break;
+	}
+
+	return 0;
+}