BSD 4_3_Net_2 release

[unix-history] / usr / src / sys / tests / benchmarks / bench-4.1 / pipediscard.c

/*
* IPC benchmarkl,
* write and discard using pipes.
*/

main(argc, argv)
       char *argv[];
{
       char buf[512];
       int fd[2], msgsize;
       register int i, iter;

       if (argc < 3) {
               printf("usage: %s iterations message-size\n", argv[0]);
               exit(1);
       }
       argc--, argv++;
       iter = atoi(*argv);
       argc--, argv++;
       msgsize = atoi(*argv);
       if (msgsize > sizeof (buf) || msgsize <= 0) {
               printf("%s: Bad message size.\n", *argv);
               exit(2);
       }
       if (pipe(fd) < 0) {
               perror("pipe");
               exit(3);
       }
       if (fork() == 0)
               for (i = 0; i < iter; i++)
                       read(fd[0], buf, msgsize);
       else
               for (i = 0; i < iter; i++)
                       write(fd[1], buf, msgsize);
}