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authorIngo Molnar <mingo@elte.hu>2009-11-24 16:36:03 +0100
committerIngo Molnar <mingo@elte.hu>2009-11-24 16:36:07 +0100
commit1263d736a9031f3d943819662d4bad727d64bf24 (patch)
treec740e74d19a0ecadd00bbdb8ad4b5a6b8d297480 /tools/perf
parent184d3da8ef0ca552dffa0fdd35c046e058a2cf9a (diff)
parent12eac0bf0461910ae6dd7f071f156f75461a37cf (diff)
downloadlinux-1263d736a9031f3d943819662d4bad727d64bf24.tar.gz
Merge branch 'perf/bench' into perf/core
Merge reason: Looks mergable - ready it for the merge window. Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/Makefile1
-rw-r--r--tools/perf/bench/bench.h1
-rw-r--r--tools/perf/bench/mem-memcpy.c193
-rw-r--r--tools/perf/builtin-bench.c15
4 files changed, 209 insertions, 1 deletions
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 3ef6621bf6cd..f1537a94a05f 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -419,6 +419,7 @@ 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
diff --git a/tools/perf/bench/bench.h b/tools/perf/bench/bench.h
index 9fbd8d745fa1..f7781c6267c0 100644
--- a/tools/perf/bench/bench.h
+++ b/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
diff --git a/tools/perf/bench/mem-memcpy.c b/tools/perf/bench/mem-memcpy.c
new file mode 100644
index 000000000000..5165fd1d8d2c
--- /dev/null
+++ b/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 = calloc(length, sizeof(char));
+ if (!dst)
+ die("memory allocation failed - maybe length is too large?\n");
+
+ src = calloc(length, sizeof(char));
+ 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;
+}
diff --git a/tools/perf/builtin-bench.c b/tools/perf/builtin-bench.c
index 90c39baae0de..e043eb83092a 100644
--- a/tools/perf/builtin-bench.c
+++ b/tools/perf/builtin-bench.c
@@ -12,6 +12,7 @@
*
* Available subsystem list:
* sched ... scheduler and IPC mechanism
+ * mem ... memory access performance
*
*/
@@ -43,6 +44,15 @@ static struct bench_suite sched_suites[] = {
NULL }
};
+static struct bench_suite mem_suites[] = {
+ { "memcpy",
+ "Simple memory copy in various ways",
+ bench_mem_memcpy },
+ { NULL,
+ NULL,
+ NULL }
+};
+
struct bench_subsys {
const char *name;
const char *summary;
@@ -53,9 +63,12 @@ static struct bench_subsys subsystems[] = {
{ "sched",
"scheduler and IPC mechanism",
sched_suites },
+ { "mem",
+ "memory access performance",
+ mem_suites },
{ NULL,
NULL,
- NULL }
+ NULL }
};
static void dump_suites(int subsys_index)