Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#include <signal.h>
3#include <stdlib.h>
4#include <linux/compiler.h>
5#include <unistd.h>
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;
14
15static void sighandler(int sig __maybe_unused)
16{
17 done = 1;
18}
19
20noinline void leaf(volatile int b)
21{
22 while (!done)
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{
33 int sec = 1;
34
35 if (argc > 0)
36 sec = atoi(argv[0]);
37
38 signal(SIGINT, sighandler);
39 signal(SIGALRM, sighandler);
40 alarm(sec);
41
42 parent(sec);
43 return 0;
44}
45
46DEFINE_WORKLOAD(leafloop);