| 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(b: sec); |
| 43 | return 0; |
| 44 | } |
| 45 | |
| 46 | DEFINE_WORKLOAD(leafloop); |
| 47 |