65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
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/*
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* Thread Exerciser
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*
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* Unlike testthread which is mainly concerned about testing thread
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* semantics this test is used to exercise the thread creation and
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* accounting. A version of this test found a problem with clashing
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* cpu_indexes which caused a break in plugin handling.
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*
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* Based on the original test case by Nikolay Igotti.
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*
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* Copyright (c) 2020 Linaro Ltd
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <pthread.h>
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int max_threads = 10;
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typedef struct {
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int delay;
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} ThreadArg;
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static void *thread_fn(void* varg)
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{
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ThreadArg *arg = varg;
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usleep(arg->delay);
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free(arg);
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return NULL;
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}
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int main(int argc, char **argv)
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{
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int i;
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pthread_t *threads;
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if (argc > 1) {
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max_threads = atoi(argv[1]);
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}
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threads = calloc(sizeof(pthread_t), max_threads);
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for (i = 0; i < max_threads; i++) {
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ThreadArg *arg = calloc(sizeof(ThreadArg), 1);
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arg->delay = i * 100;
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pthread_create(threads + i, NULL, thread_fn, arg);
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}
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printf("Created %d threads\n", max_threads);
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/* sleep until roughly half the threads have "finished" */
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usleep(max_threads * 50);
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for (i = 0; i < max_threads; i++) {
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pthread_join(threads[i], NULL);
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}
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printf("Done\n");
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return 0;
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}
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