| 1 |
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| 2 | #include <pthread.h>
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| 3 | #include <stdlib.h>
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| 4 | #include <signal.h>
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| 5 | #include <unistd.h>
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| 6 | #include <linux/compiler.h>
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| 7 | #include "../tests.h"
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| 8 |
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| 9 | static volatile sig_atomic_t done;
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| 10 |
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| 11 |
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| 12 | noinline void test_loop(void);
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| 13 |
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| 14 | static void sighandler(int sig __maybe_unused)
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| 15 | {
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| 16 | done = 1;
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| 17 | }
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| 18 |
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| 19 | noinline void test_loop(void)
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| 20 | {
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| 21 | while (!done);
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| 22 | }
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| 23 |
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| 24 | static void *thfunc(void *arg)
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| 25 | {
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| 26 | void (*loop_fn)(void) = arg;
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| 27 |
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| 28 | loop_fn();
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| 29 | return NULL;
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| 30 | }
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| 31 |
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| 32 | static int thloop(int argc, const char **argv)
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| 33 | {
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| 34 | int nt = 2, err = 1;
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| 35 | double sec = 1.0;
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| 36 | pthread_t *thread_list = NULL;
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| 37 |
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| 38 | if (argc > 0)
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| 39 | sec = atof(argv[0]);
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| 40 |
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| 41 | if (!(sec > 0.0)) {
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| 42 | fprintf(stderr, "Error: seconds (%f) must be > 0\n", sec);
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| 43 | return 1;
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| 44 | }
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| 45 |
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| 46 | if (argc > 1)
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| 47 | nt = atoi(argv[1]);
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| 48 |
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| 49 | if (nt <= 0) {
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| 50 | fprintf(stderr, "Error: thread count (%d) must be >= 1\n", nt);
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| 51 | return 1;
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| 52 | }
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| 53 |
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| 54 | signal(SIGINT, sighandler);
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| 55 | signal(SIGALRM, sighandler);
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| 56 |
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| 57 | thread_list = calloc(nt, sizeof(pthread_t));
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| 58 | if (thread_list == NULL) {
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| 59 | fprintf(stderr, "Error: malloc failed for %d threads\n", nt);
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| 60 | goto out;
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| 61 | }
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| 62 | for (int i = 1; i < nt; i++) {
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| 63 | int ret = pthread_create(&thread_list[i], NULL, thfunc, test_loop);
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| 64 |
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| 65 | if (ret) {
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| 66 | fprintf(stderr, "Error: failed to create thread %d\n", i);
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| 67 | done = 1; |
| 68 | goto out;
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| 69 | }
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| 70 | }
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| 71 | if (sec < 1.0) {
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| 72 | useconds_t usecs = (useconds_t)(sec * 1000000.0);
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| 73 |
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| 74 | ualarm(usecs > 0 ? usecs : 1, 0);
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| 75 | } else
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| 76 | alarm((unsigned int)sec);
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| 77 | test_loop();
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| 78 | err = 0;
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| 79 | out:
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| 80 | for (int i = 1; i < nt; i++) {
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| 81 | if (thread_list && thread_list[i])
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| 82 | pthread_join(thread_list[i], NULL);
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| 83 | }
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| 84 | free(thread_list);
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| 85 | return err;
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| 86 | }
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| 87 |
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| 88 | DEFINE_WORKLOAD(thloop);
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