diff options
Diffstat (limited to 'mit-pthreads/tests/bench_fcntl.c')
-rw-r--r-- | mit-pthreads/tests/bench_fcntl.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/mit-pthreads/tests/bench_fcntl.c b/mit-pthreads/tests/bench_fcntl.c new file mode 100644 index 00000000000..046046adda4 --- /dev/null +++ b/mit-pthreads/tests/bench_fcntl.c @@ -0,0 +1,82 @@ +/* ==== 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 <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("getopt [-d?] [-c count]\n"); + errno = 0; +} + +main(int argc, char **argv) +{ + struct timeval starttime, endtime; + int count = 1000000; + int debug = 0; + int flags; + int fd; + int i; + + char word[8192]; + + /* Getopt variables. */ + extern int optind, opterr; + extern char *optarg; + + 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); + } + } + + if ((fd = open("/dev/zero", O_RDONLY)) < OK) { + printf("Error: open\n"); + exit(0); + } + + if (gettimeofday(&starttime, NULL)) { + printf("Error: gettimeofday\n"); + exit(0); + } + for (i = 0; i < count; i++) { + if ((flags = fcntl(0, F_GETFL)) < 0) { + perror("fcntl 1st GETFL"); + } + } + if (gettimeofday(&endtime, NULL)) { + printf("Error: gettimeofday\n"); + exit(0); + } + + printf("%d fcntls of /dev/null took %d usecs.\n", count, + (endtime.tv_sec - starttime.tv_sec) * 1000000 + + (endtime.tv_usec - starttime.tv_usec)); +} |