tools/perf/bench/mem-memset.c - kernel/msm - Gitiles

 /*
  * 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 "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_clock;
 static int		clock_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 copy. "
 		    "available unit: B, MB, GB (upper and lower)"),
 	OPT_STRING('r', "routine", &routine, "default",
 		    "Specify routine to copy"),
 	OPT_INTEGER('i', "iterations", &iterations,
 		    "repeat memset() invocation this number of times"),
 	OPT_BOOLEAN('c', "clock", &use_clock,
 		    "Use CPU clock 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 ARCH_X86_64

 #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 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;
 }

 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_clock(memset_t fn, size_t len, bool prefault)
 {
 	u64 clock_start = 0ULL, clock_end = 0ULL;
 	void *dst = NULL;
 	int i;

 	alloc_mem(&dst, len);

 	if (prefault)
 		fn(dst, -1, len);

 	clock_start = get_clock();
 	for (i = 0; i < iterations; ++i)
 		fn(dst, i, len);
 	clock_end = get_clock();

 	free(dst);
 	return clock_end - clock_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 __used)
 {
 	int i;
 	size_t len;
 	double result_bps[2];
 	u64 result_clock[2];

 	argc = parse_options(argc, argv, options,
 			     bench_mem_memset_usage, 0);

 	if (use_clock)
 		init_clock();

 	len = (size_t)perf_atoll((char *)length_str);

 	result_clock[0] = result_clock[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_clock) {
 			result_clock[0] =
 				do_memset_clock(routines[i].fn, len, false);
 			result_clock[1] =
 				do_memset_clock(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_clock) {
 			result_clock[pf] =
 				do_memset_clock(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_clock) {
 				printf(" %14lf Clock/Byte\n",
 					(double)result_clock[0]
 					/ (double)len);
 				printf(" %14lf Clock/Byte (with prefault)\n ",
 					(double)result_clock[1]
 					/ (double)len);
 			} else {
 				print_bps(result_bps[0]);
 				printf("\n");
 				print_bps(result_bps[1]);
 				printf(" (with prefault)\n");
 			}
 		} else {
 			if (use_clock) {
 				printf(" %14lf Clock/Byte",
 					(double)result_clock[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_clock) {
 				printf("%lf %lf\n",
 					(double)result_clock[0] / (double)len,
 					(double)result_clock[1] / (double)len);
 			} else {
 				printf("%lf %lf\n",
 					result_bps[0], result_bps[1]);
 			}
 		} else {
 			if (use_clock) {
 				printf("%lf\n", (double)result_clock[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;
 }
	/*
	* 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 "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_clock;
	static int clock_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 copy. "
	"available unit: B, MB, GB (upper and lower)"),
	OPT_STRING('r', "routine", &routine, "default",
	"Specify routine to copy"),
	OPT_INTEGER('i', "iterations", &iterations,
	"repeat memset() invocation this number of times"),
	OPT_BOOLEAN('c', "clock", &use_clock,
	"Use CPU clock 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 ARCH_X86_64

	#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 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;
	}

	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_clock(memset_t fn, size_t len, bool prefault)
	{
	u64 clock_start = 0ULL, clock_end = 0ULL;
	void *dst = NULL;
	int i;

	alloc_mem(&dst, len);

	if (prefault)
	fn(dst, -1, len);

	clock_start = get_clock();
	for (i = 0; i < iterations; ++i)
	fn(dst, i, len);
	clock_end = get_clock();

	free(dst);
	return clock_end - clock_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 __used)
	{
	int i;
	size_t len;
	double result_bps[2];
	u64 result_clock[2];

	argc = parse_options(argc, argv, options,
	bench_mem_memset_usage, 0);

	if (use_clock)
	init_clock();

	len = (size_t)perf_atoll((char *)length_str);

	result_clock[0] = result_clock[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_clock) {
	result_clock[0] =
	do_memset_clock(routines[i].fn, len, false);
	result_clock[1] =
	do_memset_clock(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_clock) {
	result_clock[pf] =
	do_memset_clock(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_clock) {
	printf(" %14lf Clock/Byte\n",
	(double)result_clock[0]
	/ (double)len);
	printf(" %14lf Clock/Byte (with prefault)\n ",
	(double)result_clock[1]
	/ (double)len);
	} else {
	print_bps(result_bps[0]);
	printf("\n");
	print_bps(result_bps[1]);
	printf(" (with prefault)\n");
	}
	} else {
	if (use_clock) {
	printf(" %14lf Clock/Byte",
	(double)result_clock[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_clock) {
	printf("%lf %lf\n",
	(double)result_clock[0] / (double)len,
	(double)result_clock[1] / (double)len);
	} else {
	printf("%lf %lf\n",
	result_bps[0], result_bps[1]);
	}
	} else {
	if (use_clock) {
	printf("%lf\n", (double)result_clock[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;
	}