// SPDX-License-Identifier: GPL-2.0 #include <test_progs.h> #include <stdio.h> #include <stdlib.h> #include <sys/mman.h> #include <pthread.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include "test_send_signal_kern.skel.h" static void sigusr1_handler(int signum) { } #define THREAD_COUNT 100 static void *worker(void *p) { int i; for ( i = 0; i < 1000; i++) usleep(1); return NULL; } void test_send_signal_sched_switch(void) { struct test_send_signal_kern *skel; pthread_t threads[THREAD_COUNT]; u32 duration = 0; int i, err; signal(SIGUSR1, sigusr1_handler); skel = test_send_signal_kern__open_and_load(); if (CHECK(!skel, "skel_open_and_load", "skeleton open_and_load failed\n")) return; skel->bss->pid = getpid(); skel->bss->sig = SIGUSR1; err = test_send_signal_kern__attach(skel); if (CHECK(err, "skel_attach", "skeleton attach failed\n")) goto destroy_skel; for (i = 0; i < THREAD_COUNT; i++) { err = pthread_create(threads + i, NULL, worker, NULL); if (CHECK(err, "pthread_create", "Error creating thread, %s\n", strerror(errno))) goto destroy_skel; } for (i = 0; i < THREAD_COUNT; i++) pthread_join(threads[i], NULL); destroy_skel: test_send_signal_kern__destroy(skel); }