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Message-Id: <1417535441-3965-1-git-send-email-rabin.vincent@axis.com>
Date: Tue, 2 Dec 2014 16:50:39 +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 1/3] perf: bench: prepare memcpy for merge
The memset benchmark is largely copy-pasted from the memcpy benchmark.
Prepare the memcpy file for merge with memset by extracting out a
generic function.
Signed-off-by: Rabin Vincent <rabin.vincent@...s.com>
---
tools/perf/bench/mem-memcpy.c | 182 +++++++++++++++++++++++------------------
1 file changed, 104 insertions(+), 78 deletions(-)
diff --git a/tools/perf/bench/mem-memcpy.c b/tools/perf/bench/mem-memcpy.c
index 2465141..4a4493a 100644
--- a/tools/perf/bench/mem-memcpy.c
+++ b/tools/perf/bench/mem-memcpy.c
@@ -52,16 +52,18 @@ typedef void *(*memcpy_t)(void *, const void *, size_t);
struct routine {
const char *name;
const char *desc;
- memcpy_t fn;
+ union {
+ memcpy_t memcpy;
+ } fn;
};
-struct routine routines[] = {
- { "default",
- "Default memcpy() provided by glibc",
- memcpy },
+struct routine memcpy_routines[] = {
+ { .name = "default",
+ .desc = "Default memcpy() provided by glibc",
+ .fn.memcpy = memcpy },
#ifdef HAVE_ARCH_X86_64_SUPPORT
-#define MEMCPY_FN(fn, name, desc) { name, desc, fn },
+#define MEMCPY_FN(_fn, _name, _desc) {.name = _name, .desc = _desc, .fn.memcpy = _fn},
#include "mem-memcpy-x86-64-asm-def.h"
#undef MEMCPY_FN
@@ -69,7 +71,7 @@ struct routine routines[] = {
{ NULL,
NULL,
- NULL }
+ {NULL} }
};
static const char * const bench_mem_memcpy_usage[] = {
@@ -110,63 +112,6 @@ static double timeval2double(struct timeval *ts)
(double)ts->tv_usec / (double)1000000;
}
-static void alloc_mem(void **dst, void **src, size_t length)
-{
- *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");
- /* Make sure to always replace the zero pages even if MMAP_THRESH is crossed */
- memset(*src, 0, length);
-}
-
-static u64 do_memcpy_cycle(memcpy_t fn, size_t len, bool prefault)
-{
- u64 cycle_start = 0ULL, cycle_end = 0ULL;
- void *src = NULL, *dst = NULL;
- int i;
-
- alloc_mem(&src, &dst, len);
-
- if (prefault)
- fn(dst, src, len);
-
- cycle_start = get_cycle();
- for (i = 0; i < iterations; ++i)
- fn(dst, src, len);
- cycle_end = get_cycle();
-
- free(src);
- free(dst);
- return cycle_end - cycle_start;
-}
-
-static double do_memcpy_gettimeofday(memcpy_t fn, size_t len, bool prefault)
-{
- struct timeval tv_start, tv_end, tv_diff;
- void *src = NULL, *dst = NULL;
- int i;
-
- alloc_mem(&src, &dst, len);
-
- if (prefault)
- fn(dst, src, len);
-
- BUG_ON(gettimeofday(&tv_start, NULL));
- for (i = 0; i < iterations; ++i)
- fn(dst, src, len);
- BUG_ON(gettimeofday(&tv_end, NULL));
-
- timersub(&tv_end, &tv_start, &tv_diff);
-
- free(src);
- free(dst);
- return (double)((double)len / timeval2double(&tv_diff));
-}
-
#define pf (no_prefault ? 0 : 1)
#define print_bps(x) do { \
@@ -180,8 +125,16 @@ static double do_memcpy_gettimeofday(memcpy_t fn, size_t len, bool prefault)
printf(" %14lf GB/Sec", x / K / K / K); \
} while (0)
-int bench_mem_memcpy(int argc, const char **argv,
- const char *prefix __maybe_unused)
+struct bench_mem_info {
+ const struct routine *routines;
+ u64 (*do_cycle)(const struct routine *r, size_t len, bool prefault);
+ double (*do_gettimeofday)(const struct routine *r, size_t len, bool prefault);
+ const char *const *usage;
+};
+
+static int bench_mem_common(int argc, const char **argv,
+ const char *prefix __maybe_unused,
+ struct bench_mem_info *info)
{
int i;
size_t len;
@@ -189,7 +142,7 @@ int bench_mem_memcpy(int argc, const char **argv,
u64 result_cycle[2];
argc = parse_options(argc, argv, options,
- bench_mem_memcpy_usage, 0);
+ info->usage, 0);
if (no_prefault && only_prefault) {
fprintf(stderr, "Invalid options: -o and -n are mutually exclusive\n");
@@ -213,16 +166,16 @@ int bench_mem_memcpy(int argc, const char **argv,
if (only_prefault && no_prefault)
only_prefault = no_prefault = false;
- for (i = 0; routines[i].name; i++) {
- if (!strcmp(routines[i].name, routine))
+ for (i = 0; info->routines[i].name; i++) {
+ if (!strcmp(info->routines[i].name, routine))
break;
}
- if (!routines[i].name) {
+ if (!info->routines[i].name) {
printf("Unknown routine:%s\n", routine);
printf("Available routines...\n");
- for (i = 0; routines[i].name; i++) {
+ for (i = 0; info->routines[i].name; i++) {
printf("\t%s ... %s\n",
- routines[i].name, routines[i].desc);
+ info->routines[i].name, info->routines[i].desc);
}
return 1;
}
@@ -234,25 +187,25 @@ int bench_mem_memcpy(int argc, const char **argv,
/* show both of results */
if (use_cycle) {
result_cycle[0] =
- do_memcpy_cycle(routines[i].fn, len, false);
+ info->do_cycle(&info->routines[i], len, false);
result_cycle[1] =
- do_memcpy_cycle(routines[i].fn, len, true);
+ info->do_cycle(&info->routines[i], len, true);
} else {
result_bps[0] =
- do_memcpy_gettimeofday(routines[i].fn,
+ info->do_gettimeofday(&info->routines[i],
len, false);
result_bps[1] =
- do_memcpy_gettimeofday(routines[i].fn,
+ info->do_gettimeofday(&info->routines[i],
len, true);
}
} else {
if (use_cycle) {
result_cycle[pf] =
- do_memcpy_cycle(routines[i].fn,
+ info->do_cycle(&info->routines[i],
len, only_prefault);
} else {
result_bps[pf] =
- do_memcpy_gettimeofday(routines[i].fn,
+ info->do_gettimeofday(&info->routines[i],
len, only_prefault);
}
}
@@ -310,3 +263,76 @@ int bench_mem_memcpy(int argc, const char **argv,
return 0;
}
+
+static void memcpy_alloc_mem(void **dst, void **src, size_t length)
+{
+ *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");
+ /* Make sure to always replace the zero pages even if MMAP_THRESH is crossed */
+ memset(*src, 0, length);
+}
+
+static u64 do_memcpy_cycle(const struct routine *r, size_t len, bool prefault)
+{
+ u64 cycle_start = 0ULL, cycle_end = 0ULL;
+ void *src = NULL, *dst = NULL;
+ memcpy_t fn = r->fn.memcpy;
+ int i;
+
+ memcpy_alloc_mem(&src, &dst, len);
+
+ if (prefault)
+ fn(dst, src, len);
+
+ cycle_start = get_cycle();
+ for (i = 0; i < iterations; ++i)
+ fn(dst, src, len);
+ cycle_end = get_cycle();
+
+ free(src);
+ free(dst);
+ return cycle_end - cycle_start;
+}
+
+static double do_memcpy_gettimeofday(const struct routine *r, size_t len,
+ bool prefault)
+{
+ struct timeval tv_start, tv_end, tv_diff;
+ memcpy_t fn = r->fn.memcpy;
+ void *src = NULL, *dst = NULL;
+ int i;
+
+ memcpy_alloc_mem(&src, &dst, len);
+
+ if (prefault)
+ fn(dst, src, len);
+
+ BUG_ON(gettimeofday(&tv_start, NULL));
+ for (i = 0; i < iterations; ++i)
+ fn(dst, src, len);
+ BUG_ON(gettimeofday(&tv_end, NULL));
+
+ timersub(&tv_end, &tv_start, &tv_diff);
+
+ free(src);
+ free(dst);
+ return (double)((double)len / timeval2double(&tv_diff));
+}
+
+int bench_mem_memcpy(int argc, const char **argv,
+ const char *prefix __maybe_unused)
+{
+ struct bench_mem_info info = {
+ .routines = memcpy_routines,
+ .do_cycle = do_memcpy_cycle,
+ .do_gettimeofday = do_memcpy_gettimeofday,
+ .usage = bench_mem_memcpy_usage,
+ };
+
+ return bench_mem_common(argc, argv, prefix, &info);
+}
--
1.7.10.4
--
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