Commit 3fe91f32 authored by Tiezhu Yang's avatar Tiezhu Yang Committed by Arnaldo Carvalho de Melo
Browse files

perf bench syscall: Introduce bench_syscall_common() 



In the current code, there is only a basic syscall benchmark via
getppid, this is not enough. Introduce bench_syscall_common() so that we
can add more syscalls to benchmark.

This is preparation for later patch, no functionality change.

Signed-off-by: default avatarTiezhu Yang <yangtiezhu@loongson.cn>
Acked-by: default avatarNamhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/1668052208-14047-3-git-send-email-yangtiezhu@loongson.cn


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 1bad5027

tools/arch/x86/include/uapi/asm/unistd_32.h

+3 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

#ifndef __NR_getppid

#define __NR_getppid 64

#endif

#ifndef __NR_gettid

#define __NR_gettid 224

#endif

tools/arch/x86/include/uapi/asm/unistd_64.h

+3 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

#ifndef __NR_getppid

#define __NR_getppid 110

#endif

#ifndef __NR_gettid

#define __NR_gettid 186

#endif

tools/perf/bench/syscall.c

+25 −4
Original line number Diff line number Diff line
@@ -30,25 +30,41 @@ static const char * const bench_syscall_usage[] = { 
	NULL

};



int bench_syscall_basic(int argc, const char **argv)

static int bench_syscall_common(int argc, const char **argv, int syscall)

{

	struct timeval start, stop, diff;

	unsigned long long result_usec = 0;

	const char *name = NULL;

	int i;



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



	gettimeofday(&start, NULL);



	for (i = 0; i < loops; i++)

	for (i = 0; i < loops; i++) {

		switch (syscall) {

		case __NR_getppid:

			getppid();

			break;

		default:

			break;

		}

	}



	gettimeofday(&stop, NULL);

	timersub(&stop, &start, &diff);



	switch (syscall) {

	case __NR_getppid:

		name = "getppid()";

		break;

	default:

		break;

	}



	switch (bench_format) {

	case BENCH_FORMAT_DEFAULT:

		printf("# Executed %'d getppid() calls\n", loops);

		printf("# Executed %'d %s calls\n", loops, name);



		result_usec = diff.tv_sec * 1000000;

		result_usec += diff.tv_usec;
@@ -79,3 +95,8 @@ int bench_syscall_basic(int argc, const char **argv) 


	return 0;

}



int bench_syscall_basic(int argc, const char **argv)

{

	return bench_syscall_common(argc, argv, __NR_getppid);

}