linux-kernel - [PATCH 2/2] tools perf: Add a new benchmark tool for semaphore/mutex

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Date:	Mon, 16 Apr 2012 08:34:56 +0000
From:	"Chen, Dennis (SRDC SW)" <Dennis1.Chen@....com>
To:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:	Ingo Molnar <mingo@...nel.org>,
	"paulmck@...ux.vnet.ibm.com" <paulmck@...ux.vnet.ibm.com>,
	"peterz@...radead.org" <peterz@...radead.org>,
	Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Subject: [PATCH 2/2] tools perf: Add a new benchmark tool for semaphore/mutex

A new performance benchmark tool for semaphore or mutex lock.

Signed-off-by: Dennis Chen <dennis1.chen@....com>
---
diff --git a/tools/perf/builtin-bench.c b/tools/perf/builtin-bench.c
index fcb9626..354a133 100644
--- a/tools/perf/builtin-bench.c
+++ b/tools/perf/builtin-bench.c
@@ -58,6 +58,16 @@ static struct bench_suite mem_suites[] = {
          NULL             }
 };
 
+static struct bench_suite lock_suites[] = {
+       { "mutex",
+         "Simple performance measurement for semaphore/mutex lock",
+         bench_lock_mutex },
+       suite_all,
+       { NULL,
+         NULL,
+         NULL             }
+};
+
 struct bench_subsys {
        const char *name;
        const char *summary;
@@ -71,6 +81,9 @@ static struct bench_subsys subsystems[] = {
        { "mem",
          "memory access performance",
          mem_suites },
+       { "locking",
+         "lock method performance",
+         lock_suites },
        { "all",                /* sentinel: easy for help */
          "test all subsystem (pseudo subsystem)",
          NULL },

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 8a4b9bc..a947396 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -363,6 +363,7 @@ ifeq ($(RAW_ARCH),x86_64)
 BUILTIN_OBJS += $(OUTPUT)bench/mem-memcpy-x86-64-asm.o
 endif
 BUILTIN_OBJS += $(OUTPUT)bench/mem-memcpy.o
+BUILTIN_OBJS += $(OUTPUT)bench/lock-mutex.o
 
 BUILTIN_OBJS += $(OUTPUT)builtin-diff.o
 BUILTIN_OBJS += $(OUTPUT)builtin-evlist.o

diff --git a/tools/perf/bench/bench.h b/tools/perf/bench/bench.h
index f7781c6..57f1170 100644
--- a/tools/perf/bench/bench.h
+++ b/tools/perf/bench/bench.h
@@ -4,6 +4,8 @@
 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);
+extern int bench_lock_mutex(int argc, const char **argv,
+                               const char *prefix __used);
 
 #define BENCH_FORMAT_DEFAULT_STR       "default"
 #define BENCH_FORMAT_DEFAULT           0


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