leafloop.c (7ae9fb1b7ecbb5d85d07857943f677fd1a559b18) leafloop.c (ff16aeb9b83441b8458d4235496cf320189a0c60)
1/* SPDX-License-Identifier: GPL-2.0 */
1/* SPDX-License-Identifier: GPL-2.0 */
2#include <signal.h>
2#include <stdlib.h>
3#include <linux/compiler.h>
3#include <stdlib.h>
4#include <linux/compiler.h>
5#include <unistd.h>
4#include "../tests.h"
5
6/* We want to check these symbols in perf script */
7noinline void leaf(volatile int b);
8noinline void parent(volatile int b);
9
10static volatile int a;
6#include "../tests.h"
7
8/* We want to check these symbols in perf script */
9noinline void leaf(volatile int b);
10noinline void parent(volatile int b);
11
12static volatile int a;
13static volatile sig_atomic_t done;
11
14
15static void sighandler(int sig __maybe_unused)
16{
17 done = 1;
18}
19
12noinline void leaf(volatile int b)
13{
20noinline void leaf(volatile int b)
21{
14 for (;;)
22 while (!done)
15 a += b;
16}
17
18noinline void parent(volatile int b)
19{
20 leaf(b);
21}
22
23static int leafloop(int argc, const char **argv)
24{
23 a += b;
24}
25
26noinline void parent(volatile int b)
27{
28 leaf(b);
29}
30
31static int leafloop(int argc, const char **argv)
32{
25 int c = 1;
33 int sec = 1;
26
27 if (argc > 0)
34
35 if (argc > 0)
28 c = atoi(argv[0]);
36 sec = atoi(argv[0]);
29
37
30 parent(c);
38 signal(SIGINT, sighandler);
39 signal(SIGALRM, sighandler);
40 alarm(sec);
41
42 parent(sec);
31 return 0;
32}
33
34DEFINE_WORKLOAD(leafloop);
43 return 0;
44}
45
46DEFINE_WORKLOAD(leafloop);