1 files changed, 103 insertions, 0 deletions
diff --git a/lib/libpthread/tests/p_bench_read.c b/lib/libpthread/tests/p_bench_read.c
new file mode 100644
index 00000000000..52a6aca7706
--- /dev/null
+++ b/lib/libpthread/tests/p_bench_read.c
@@ -0,0 +1,103 @@
+/* ==== p_bench_read.c ============================================================
+ * Copyright (c) 1993 by Chris Provenzano, proven@athena.mit.edu
+ *
+ * Description : Benchmark reads of /dev/null. Gives a good aprox. of
+ *				 syscall times.
+ *
+ *  1.00 93/08/01 proven
+ *      -Started coding this file.
+ */
+
+#include <pthread.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#define	OK		0
+#define	NOTOK  -1
+
+/* ==========================================================================
+ * usage();
+ */
+void usage(void)
+{
+	printf("p_bench_read [-d?] [-c count] [-s size] [-f file]\n");
+    errno = 0;
+}
+
+main(int argc, char **argv)
+{
+	struct timeval starttime, endtime;
+	char *infile = "/dev/null";
+	int count = 1000000;
+	int debug = 0;
+	int size = 1;
+	int fd;
+	int i;
+
+	char word[16384], *word_ptr;
+
+    /* Getopt variables. */
+    extern int optind, opterr;
+    extern char *optarg;
+
+	pthread_init();
+
+	while ((word[0] = getopt(argc, argv, "c:df:s:?")) != (char)EOF) {
+		switch (word[0]) {
+		case 'c':
+			count = atoi(optarg);
+			break;
+		case 'd':
+			debug++;
+			break;
+		case 'f':
+			infile = optarg;
+			break;
+		case 's':
+			if ((size = atoi(optarg)) > 8192) {
+				size = 8192;
+			}
+			break;
+		case '?':
+			usage();
+			return(OK);
+		default:
+			usage();
+			return(NOTOK);
+		}
+	}
+
+	/* Align buffer boundary to a page boundary */
+	word_ptr = (char *)(((size_t) word + 4095) & ~4095);
+
+	if ((fd = open(infile, O_RDONLY)) < OK) {
+	  perror ("open");
+	  return 1;
+	}
+
+	if (gettimeofday(&starttime, NULL)) {
+	  perror ("gettimeofday");
+	  return 1;
+	}
+
+	for (i = 0; i < count; i++) {
+		if (read(fd, word_ptr, size) < OK) {
+			printf("Error: read\n");
+			exit(0);
+		}
+	}
+
+	if (gettimeofday(&endtime, NULL)) {
+	  perror ("gettimeofday");
+	  return 1;
+	}
+
+	printf("%d reads of %s took %d usecs.\n", count, infile,
+		(endtime.tv_sec - starttime.tv_sec) * 1000000 +
+		(endtime.tv_usec - starttime.tv_usec));
+
+	return 0;
+}