| 1 | /* |
| 2 | * Thread Exerciser |
| 3 | * |
| 4 | * Unlike testthread which is mainly concerned about testing thread |
| 5 | * semantics this test is used to exercise the thread creation and |
| 6 | * accounting. A version of this test found a problem with clashing |
| 7 | * cpu_indexes which caused a break in plugin handling. |
| 8 | * |
| 9 | * Based on the original test case by Nikolay Igotti. |
| 10 | * |
| 11 | * Copyright (c) 2020 Linaro Ltd |
| 12 | * |
| 13 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 14 | */ |
| 15 | |
| 16 | #include <stdint.h> |
| 17 | #include <stdio.h> |
| 18 | #include <stdlib.h> |
| 19 | #include <unistd.h> |
| 20 | #include <pthread.h> |
| 21 | |
| 22 | int max_threads = 10; |
| 23 | |
| 24 | typedef struct { |
| 25 | int delay; |
| 26 | } ThreadArg; |
| 27 | |
| 28 | static void *thread_fn(void* varg) |
| 29 | { |
| 30 | ThreadArg *arg = varg; |
| 31 | usleep(arg->delay); |
| 32 | free(arg); |
| 33 | return NULL; |
| 34 | } |
| 35 | |
| 36 | int main(int argc, char **argv) |
| 37 | { |
| 38 | int i; |
| 39 | pthread_t *threads; |
| 40 | |
| 41 | if (argc > 1) { |
| 42 | max_threads = atoi(argv[1]); |
| 43 | } |
| 44 | threads = calloc(sizeof(pthread_t), max_threads); |
| 45 | |
| 46 | for (i = 0; i < max_threads; i++) { |
| 47 | ThreadArg *arg = calloc(sizeof(ThreadArg), 1); |
| 48 | arg->delay = i * 100; |
| 49 | pthread_create(threads + i, NULL, thread_fn, arg); |
| 50 | } |
| 51 | |
| 52 | printf("Created %d threads\n", max_threads); |
| 53 | |
| 54 | /* sleep until roughly half the threads have "finished" */ |
| 55 | usleep(max_threads * 50); |
| 56 | |
| 57 | for (i = 0; i < max_threads; i++) { |
| 58 | pthread_join(threads[i], NULL); |
| 59 | } |
| 60 | |
| 61 | printf("Done\n"); |
| 62 | |
| 63 | return 0; |
| 64 | } |