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: 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>
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@ -1,4 +1,7 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __NR_getppid
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#define __NR_getppid 64
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#endif
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#ifndef __NR_gettid
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#define __NR_gettid 224
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#endif
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@ -1,4 +1,7 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __NR_getppid
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#define __NR_getppid 110
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#endif
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#ifndef __NR_gettid
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#define __NR_gettid 186
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#endif
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@ -30,25 +30,41 @@ static const char * const bench_syscall_usage[] = {
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NULL
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};
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int bench_syscall_basic(int argc, const char **argv)
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static int bench_syscall_common(int argc, const char **argv, int syscall)
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{
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struct timeval start, stop, diff;
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unsigned long long result_usec = 0;
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const char *name = NULL;
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int i;
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argc = parse_options(argc, argv, options, bench_syscall_usage, 0);
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gettimeofday(&start, NULL);
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for (i = 0; i < loops; i++)
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getppid();
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for (i = 0; i < loops; i++) {
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switch (syscall) {
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case __NR_getppid:
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getppid();
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break;
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default:
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break;
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}
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}
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gettimeofday(&stop, NULL);
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timersub(&stop, &start, &diff);
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switch (syscall) {
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case __NR_getppid:
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name = "getppid()";
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break;
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default:
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break;
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}
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switch (bench_format) {
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case BENCH_FORMAT_DEFAULT:
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printf("# Executed %'d getppid() calls\n", loops);
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printf("# Executed %'d %s calls\n", loops, name);
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result_usec = diff.tv_sec * 1000000;
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result_usec += diff.tv_usec;
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@ -79,3 +95,8 @@ int bench_syscall_basic(int argc, const char **argv)
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return 0;
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}
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int bench_syscall_basic(int argc, const char **argv)
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{
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return bench_syscall_common(argc, argv, __NR_getppid);
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}
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