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 */
9 noinline void leaf(volatile int b);
10 noinline void parent(volatile int b);
11
12 static volatile int a;
13 static volatile sig_atomic_t done;
14
15 static void sighandler(int sig __maybe_unused)
16 {
17 done = 1;
18 }
19
20 noinline void leaf(volatile int b)
21 {
22 while (!done)
23 a += b;
24 }
25
26 noinline void parent(volatile int b)
27 {
28 leaf(b);
29 }
30
31 static 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
46 DEFINE_WORKLOAD(leafloop);
47
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