mirror of
https://github.com/torvalds/linux.git
synced 2024-11-28 07:01:32 +00:00
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@axis.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Rabin Vincent <rabinv@axis.com> Link: http://lkml.kernel.org/r/1417535441-3965-1-git-send-email-rabin.vincent@axis.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Rabin Vincent
Arnaldo Carvalho de Melo
parent
cfa0bd52d0
commit
308197b947
@ -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);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user