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Message-Id: <1417535441-3965-2-git-send-email-rabin.vincent@axis.com>
Date: Tue, 2 Dec 2014 16:50:40 +0100
From: Rabin Vincent <rabin.vincent@...s.com>
To: Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Paul Mackerras <paulus@...ba.org>,
Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: linux-kernel@...r.kernel.org, rabin@....in,
Rabin Vincent <rabinv@...s.com>
Subject: [PATCH 2/3] perf: bench: merge memset into memcpy
The memset benchmark is largely copy-pasted from the memcpy benchmark.
Merge the two now that memcpy is made more generic.
Signed-off-by: Rabin Vincent <rabin.vincent@...s.com>
---
tools/perf/Makefile.perf | 1 -
tools/perf/bench/mem-memcpy.c | 90 ++++++++++++
tools/perf/bench/mem-memset.c | 304 -----------------------------------------
3 files changed, 90 insertions(+), 305 deletions(-)
delete mode 100644 tools/perf/bench/mem-memset.c
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 478efa9..763e68f 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -458,7 +458,6 @@ BUILTIN_OBJS += $(OUTPUT)bench/mem-memcpy-x86-64-asm.o
BUILTIN_OBJS += $(OUTPUT)bench/mem-memset-x86-64-asm.o
endif
BUILTIN_OBJS += $(OUTPUT)bench/mem-memcpy.o
-BUILTIN_OBJS += $(OUTPUT)bench/mem-memset.o
BUILTIN_OBJS += $(OUTPUT)bench/futex-hash.o
BUILTIN_OBJS += $(OUTPUT)bench/futex-wake.o
BUILTIN_OBJS += $(OUTPUT)bench/futex-requeue.o
diff --git a/tools/perf/bench/mem-memcpy.c b/tools/perf/bench/mem-memcpy.c
index 4a4493a..e18be70 100644
--- a/tools/perf/bench/mem-memcpy.c
+++ b/tools/perf/bench/mem-memcpy.c
@@ -13,6 +13,7 @@
#include "../util/cloexec.h"
#include "bench.h"
#include "mem-memcpy-arch.h"
+#include "mem-memset-arch.h"
#include <stdio.h>
#include <stdlib.h>
@@ -48,12 +49,14 @@ static const struct option options[] = {
};
typedef void *(*memcpy_t)(void *, const void *, size_t);
+typedef void *(*memset_t)(void *, int, size_t);
struct routine {
const char *name;
const char *desc;
union {
memcpy_t memcpy;
+ memset_t memset;
} fn;
};
@@ -336,3 +339,90 @@ int bench_mem_memcpy(int argc, const char **argv,
return bench_mem_common(argc, argv, prefix, &info);
}
+
+static void memset_alloc_mem(void **dst, size_t length)
+{
+ *dst = zalloc(length);
+ if (!*dst)
+ die("memory allocation failed - maybe length is too large?\n");
+}
+
+static u64 do_memset_cycle(const struct routine *r, size_t len, bool prefault)
+{
+ u64 cycle_start = 0ULL, cycle_end = 0ULL;
+ memset_t fn = r->fn.memset;
+ void *dst = NULL;
+ int i;
+
+ memset_alloc_mem(&dst, len);
+
+ if (prefault)
+ fn(dst, -1, len);
+
+ cycle_start = get_cycle();
+ for (i = 0; i < iterations; ++i)
+ fn(dst, i, len);
+ cycle_end = get_cycle();
+
+ free(dst);
+ return cycle_end - cycle_start;
+}
+
+static double do_memset_gettimeofday(const struct routine *r, size_t len,
+ bool prefault)
+{
+ struct timeval tv_start, tv_end, tv_diff;
+ memset_t fn = r->fn.memset;
+ void *dst = NULL;
+ int i;
+
+ memset_alloc_mem(&dst, len);
+
+ if (prefault)
+ fn(dst, -1, len);
+
+ BUG_ON(gettimeofday(&tv_start, NULL));
+ for (i = 0; i < iterations; ++i)
+ fn(dst, i, len);
+ BUG_ON(gettimeofday(&tv_end, NULL));
+
+ timersub(&tv_end, &tv_start, &tv_diff);
+
+ free(dst);
+ return (double)((double)len / timeval2double(&tv_diff));
+}
+
+static const char * const bench_mem_memset_usage[] = {
+ "perf bench mem memset <options>",
+ NULL
+};
+
+static const struct routine memset_routines[] = {
+ { .name ="default",
+ .desc = "Default memset() provided by glibc",
+ .fn.memset = memset },
+#ifdef HAVE_ARCH_X86_64_SUPPORT
+
+#define MEMSET_FN(_fn, _name, _desc) { .name = _name, .desc = _desc, .fn.memset = _fn },
+#include "mem-memset-x86-64-asm-def.h"
+#undef MEMSET_FN
+
+#endif
+
+ { .name = NULL,
+ .desc = NULL,
+ .fn.memset = NULL }
+};
+
+int bench_mem_memset(int argc, const char **argv,
+ const char *prefix __maybe_unused)
+{
+ struct bench_mem_info info = {
+ .routines = memset_routines,
+ .do_cycle = do_memset_cycle,
+ .do_gettimeofday = do_memset_gettimeofday,
+ .usage = bench_mem_memset_usage,
+ };
+
+ return bench_mem_common(argc, argv, prefix, &info);
+}
diff --git a/tools/perf/bench/mem-memset.c b/tools/perf/bench/mem-memset.c
deleted file mode 100644
index 75fc3e6..0000000
--- a/tools/perf/bench/mem-memset.c
+++ /dev/null
@@ -1,304 +0,0 @@
-/*
- * mem-memset.c
- *
- * memset: Simple memory set in various ways
- *
- * Trivial clone of mem-memcpy.c.
- */
-
-#include "../perf.h"
-#include "../util/util.h"
-#include "../util/parse-options.h"
-#include "../util/header.h"
-#include "../util/cloexec.h"
-#include "bench.h"
-#include "mem-memset-arch.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 iterations = 1;
-static bool use_cycle;
-static int cycle_fd;
-static bool only_prefault;
-static bool no_prefault;
-
-static const struct option options[] = {
- OPT_STRING('l', "length", &length_str, "1MB",
- "Specify length of memory to set. "
- "Available units: B, KB, MB, GB and TB (upper and lower)"),
- OPT_STRING('r', "routine", &routine, "default",
- "Specify routine to set"),
- OPT_INTEGER('i', "iterations", &iterations,
- "repeat memset() invocation this number of times"),
- OPT_BOOLEAN('c', "cycle", &use_cycle,
- "Use cycles event instead of gettimeofday() for measuring"),
- OPT_BOOLEAN('o', "only-prefault", &only_prefault,
- "Show only the result with page faults before memset()"),
- OPT_BOOLEAN('n', "no-prefault", &no_prefault,
- "Show only the result without page faults before memset()"),
- OPT_END()
-};
-
-typedef void *(*memset_t)(void *, int, size_t);
-
-struct routine {
- const char *name;
- const char *desc;
- memset_t fn;
-};
-
-static const struct routine routines[] = {
- { "default",
- "Default memset() provided by glibc",
- memset },
-#ifdef HAVE_ARCH_X86_64_SUPPORT
-
-#define MEMSET_FN(fn, name, desc) { name, desc, fn },
-#include "mem-memset-x86-64-asm-def.h"
-#undef MEMSET_FN
-
-#endif
-
- { NULL,
- NULL,
- NULL }
-};
-
-static const char * const bench_mem_memset_usage[] = {
- "perf bench mem memset <options>",
- NULL
-};
-
-static struct perf_event_attr cycle_attr = {
- .type = PERF_TYPE_HARDWARE,
- .config = PERF_COUNT_HW_CPU_CYCLES
-};
-
-static void init_cycle(void)
-{
- cycle_fd = sys_perf_event_open(&cycle_attr, getpid(), -1, -1,
- perf_event_open_cloexec_flag());
-
- if (cycle_fd < 0 && errno == ENOSYS)
- die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
- else
- BUG_ON(cycle_fd < 0);
-}
-
-static u64 get_cycle(void)
-{
- int ret;
- u64 clk;
-
- ret = read(cycle_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;
-}
-
-static void alloc_mem(void **dst, size_t length)
-{
- *dst = zalloc(length);
- if (!*dst)
- die("memory allocation failed - maybe length is too large?\n");
-}
-
-static u64 do_memset_cycle(memset_t fn, size_t len, bool prefault)
-{
- u64 cycle_start = 0ULL, cycle_end = 0ULL;
- void *dst = NULL;
- int i;
-
- alloc_mem(&dst, len);
-
- if (prefault)
- fn(dst, -1, len);
-
- cycle_start = get_cycle();
- for (i = 0; i < iterations; ++i)
- fn(dst, i, len);
- cycle_end = get_cycle();
-
- free(dst);
- return cycle_end - cycle_start;
-}
-
-static double do_memset_gettimeofday(memset_t fn, size_t len, bool prefault)
-{
- struct timeval tv_start, tv_end, tv_diff;
- void *dst = NULL;
- int i;
-
- alloc_mem(&dst, len);
-
- if (prefault)
- fn(dst, -1, len);
-
- BUG_ON(gettimeofday(&tv_start, NULL));
- for (i = 0; i < iterations; ++i)
- fn(dst, i, len);
- BUG_ON(gettimeofday(&tv_end, NULL));
-
- timersub(&tv_end, &tv_start, &tv_diff);
-
- free(dst);
- return (double)((double)len / timeval2double(&tv_diff));
-}
-
-#define pf (no_prefault ? 0 : 1)
-
-#define print_bps(x) do { \
- if (x < K) \
- printf(" %14lf B/Sec", x); \
- else if (x < K * K) \
- printf(" %14lfd KB/Sec", x / K); \
- else if (x < K * K * K) \
- printf(" %14lf MB/Sec", x / K / K); \
- else \
- printf(" %14lf GB/Sec", x / K / K / K); \
- } while (0)
-
-int bench_mem_memset(int argc, const char **argv,
- const char *prefix __maybe_unused)
-{
- int i;
- size_t len;
- double result_bps[2];
- u64 result_cycle[2];
-
- argc = parse_options(argc, argv, options,
- bench_mem_memset_usage, 0);
-
- if (no_prefault && only_prefault) {
- fprintf(stderr, "Invalid options: -o and -n are mutually exclusive\n");
- return 1;
- }
-
- if (use_cycle)
- init_cycle();
-
- len = (size_t)perf_atoll((char *)length_str);
-
- result_cycle[0] = result_cycle[1] = 0ULL;
- result_bps[0] = result_bps[1] = 0.0;
-
- if ((s64)len <= 0) {
- fprintf(stderr, "Invalid length:%s\n", length_str);
- return 1;
- }
-
- /* same to without specifying either of prefault and no-prefault */
- if (only_prefault && no_prefault)
- only_prefault = no_prefault = false;
-
- 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;
- }
-
- if (bench_format == BENCH_FORMAT_DEFAULT)
- printf("# Copying %s Bytes ...\n\n", length_str);
-
- if (!only_prefault && !no_prefault) {
- /* show both of results */
- if (use_cycle) {
- result_cycle[0] =
- do_memset_cycle(routines[i].fn, len, false);
- result_cycle[1] =
- do_memset_cycle(routines[i].fn, len, true);
- } else {
- result_bps[0] =
- do_memset_gettimeofday(routines[i].fn,
- len, false);
- result_bps[1] =
- do_memset_gettimeofday(routines[i].fn,
- len, true);
- }
- } else {
- if (use_cycle) {
- result_cycle[pf] =
- do_memset_cycle(routines[i].fn,
- len, only_prefault);
- } else {
- result_bps[pf] =
- do_memset_gettimeofday(routines[i].fn,
- len, only_prefault);
- }
- }
-
- switch (bench_format) {
- case BENCH_FORMAT_DEFAULT:
- if (!only_prefault && !no_prefault) {
- if (use_cycle) {
- printf(" %14lf Cycle/Byte\n",
- (double)result_cycle[0]
- / (double)len);
- printf(" %14lf Cycle/Byte (with prefault)\n ",
- (double)result_cycle[1]
- / (double)len);
- } else {
- print_bps(result_bps[0]);
- printf("\n");
- print_bps(result_bps[1]);
- printf(" (with prefault)\n");
- }
- } else {
- if (use_cycle) {
- printf(" %14lf Cycle/Byte",
- (double)result_cycle[pf]
- / (double)len);
- } else
- print_bps(result_bps[pf]);
-
- printf("%s\n", only_prefault ? " (with prefault)" : "");
- }
- break;
- case BENCH_FORMAT_SIMPLE:
- if (!only_prefault && !no_prefault) {
- if (use_cycle) {
- printf("%lf %lf\n",
- (double)result_cycle[0] / (double)len,
- (double)result_cycle[1] / (double)len);
- } else {
- printf("%lf %lf\n",
- result_bps[0], result_bps[1]);
- }
- } else {
- if (use_cycle) {
- printf("%lf\n", (double)result_cycle[pf]
- / (double)len);
- } else
- printf("%lf\n", result_bps[pf]);
- }
- break;
- default:
- /* reaching this means there's some disaster: */
- die("unknown format: %d\n", bench_format);
- break;
- }
-
- return 0;
-}
--
1.7.10.4
--
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