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-rw-r--r--tools/perf/bench/syscall.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/tools/perf/bench/syscall.c b/tools/perf/bench/syscall.c
index fe79f7f3091e..ea4dfc07cbd6 100644
--- a/tools/perf/bench/syscall.c
+++ b/tools/perf/bench/syscall.c
@@ -18,6 +18,10 @@
#include <unistd.h>
#include <stdlib.h>
+#ifndef __NR_fork
+#define __NR_fork -1
+#endif
+
#define LOOPS_DEFAULT 10000000
static int loops = LOOPS_DEFAULT;
@@ -31,6 +35,23 @@ static const char * const bench_syscall_usage[] = {
NULL
};
+static void test_fork(void)
+{
+ pid_t pid = fork();
+
+ if (pid < 0) {
+ fprintf(stderr, "fork failed\n");
+ exit(1);
+ } else if (pid == 0) {
+ exit(0);
+ } else {
+ if (waitpid(pid, NULL, 0) < 0) {
+ fprintf(stderr, "waitpid failed\n");
+ exit(1);
+ }
+ }
+}
+
static void test_execve(void)
{
const char *pathname = "/bin/true";
@@ -71,6 +92,12 @@ static int bench_syscall_common(int argc, const char **argv, int syscall)
case __NR_getpgid:
getpgid(0);
break;
+ case __NR_fork:
+ test_fork();
+ /* Only loop 10000 times to save time */
+ if (i == 10000)
+ loops = 10000;
+ break;
case __NR_execve:
test_execve();
/* Only loop 10000 times to save time */
@@ -92,6 +119,9 @@ static int bench_syscall_common(int argc, const char **argv, int syscall)
case __NR_getpgid:
name = "getpgid()";
break;
+ case __NR_fork:
+ name = "fork()";
+ break;
case __NR_execve:
name = "execve()";
break;
@@ -143,6 +173,11 @@ int bench_syscall_getpgid(int argc, const char **argv)
return bench_syscall_common(argc, argv, __NR_getpgid);
}
+int bench_syscall_fork(int argc, const char **argv)
+{
+ return bench_syscall_common(argc, argv, __NR_fork);
+}
+
int bench_syscall_execve(int argc, const char **argv)
{
return bench_syscall_common(argc, argv, __NR_execve);