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Subject[PATCH v5 2/4] perf bench syscall: Introduce bench_syscall_common()
Date
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>
---
tools/arch/x86/include/uapi/asm/unistd_32.h | 3 +++
tools/arch/x86/include/uapi/asm/unistd_64.h | 3 +++
tools/perf/bench/syscall.c | 29 +++++++++++++++++++++++++----
3 files changed, 31 insertions(+), 4 deletions(-)

diff --git a/tools/arch/x86/include/uapi/asm/unistd_32.h b/tools/arch/x86/include/uapi/asm/unistd_32.h
index e1cc62d..4d8873a 100644
--- a/tools/arch/x86/include/uapi/asm/unistd_32.h
+++ b/tools/arch/x86/include/uapi/asm/unistd_32.h
@@ -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
diff --git a/tools/arch/x86/include/uapi/asm/unistd_64.h b/tools/arch/x86/include/uapi/asm/unistd_64.h
index ce8b7ab..e29038a 100644
--- a/tools/arch/x86/include/uapi/asm/unistd_64.h
+++ b/tools/arch/x86/include/uapi/asm/unistd_64.h
@@ -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
diff --git a/tools/perf/bench/syscall.c b/tools/perf/bench/syscall.c
index 9b75101..746fd71 100644
--- a/tools/perf/bench/syscall.c
+++ b/tools/perf/bench/syscall.c
@@ -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);
+}
--
2.1.0
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