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Diffstat (limited to 'lib/libpthread/tests/p_bench_mutex.c')
-rw-r--r--lib/libpthread/tests/p_bench_mutex.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/lib/libpthread/tests/p_bench_mutex.c b/lib/libpthread/tests/p_bench_mutex.c
new file mode 100644
index 00000000000..e3179f08072
--- /dev/null
+++ b/lib/libpthread/tests/p_bench_mutex.c
@@ -0,0 +1,78 @@
+/* ==== p_bench_mutex.c =================================================
+ * Copyright (c) 1993 by Chris Provenzano, proven@athena.mit.edu
+ *
+ * Description : Benchmark mutex lock and unlock times
+ *
+ * 1.00 93/11/08 proven
+ * -Started coding this file.
+ */
+
+#include <errno.h>
+#include <pthread.h>
+#include <stdio.h>
+
+#define OK 0
+#define NOTOK -1
+
+/* ==========================================================================
+ * usage();
+ */
+void usage(void)
+{
+ printf("getopt [-d?] [-c count]\n");
+ errno = 0;
+}
+
+main(int argc, char **argv)
+{
+ struct timeval starttime, endtime;
+ pthread_mutex_t lock;
+ int count = 1000000;
+ int debug = 0;
+ int i;
+
+ char word[256];
+
+ /* Getopt variables. */
+ extern int optind, opterr;
+ extern char *optarg;
+
+ pthread_init();
+
+ while ((word[0] = getopt(argc, argv, "c:d?")) != (char)EOF) {
+ switch (word[0]) {
+ case 'd':
+ debug++;
+ break;
+ case 'c':
+ count = atoi(optarg);
+ break;
+ case '?':
+ usage();
+ return(OK);
+ default:
+ usage();
+ return(NOTOK);
+ }
+ }
+
+ pthread_mutex_init(&lock, NULL);
+ if (gettimeofday(&starttime, NULL)) {
+ perror ("gettimeofday");
+ return 1;
+ }
+ for (i = 0; i < count; i++) {
+ pthread_mutex_lock(&lock);
+ pthread_mutex_unlock(&lock);
+ }
+ if (gettimeofday(&endtime, NULL)) {
+ perror ("gettimeofday");
+ return 1;
+ }
+
+ printf("%d mutex locks/unlocks no contention took %d usecs.\n", count,
+ (endtime.tv_sec - starttime.tv_sec) * 1000000 +
+ (endtime.tv_usec - starttime.tv_usec));
+
+ return 0;
+}