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perf bench syscall: Introduce bench_syscall_common()

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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: Tiezhu Yang <yangtiezhu@loongson.cn>
Acked-by: Namhyung 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: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Tiezhu Yang 2022-11-10 11:50:06 +08:00 committed by Arnaldo Carvalho de Melo
parent 1bad502775
commit 3fe91f3262
3 changed files with 31 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
tools/arch/x86/include/uapi/asm/unistd_32.h
View file

@ -1,4 +1,7 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __NR_getppid
#define __NR_getppid 64
#endif
#ifndef __NR_gettid
#define __NR_gettid 224
#endif

3
tools/arch/x86/include/uapi/asm/unistd_64.h
View file

@ -1,4 +1,7 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __NR_getppid
#define __NR_getppid 110
#endif
#ifndef __NR_gettid
#define __NR_gettid 186
#endif

29
tools/perf/bench/syscall.c
View file

@ -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++)
getppid();
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);
}