20     int bytes;  in main()  local
31     bytes = strtol(av[1], &ptr, 0);  in main()
33 	bytes *= 1024;  in main()
35 	bytes *= 1024 * 1024;  in main()
40     if (bytes <= 0) {  in main()
41 	fprintf(stderr, "I can't handle %d sized buffers\n", bytes);  in main()
49     buf = mmap(NULL, bytes * 2 + PAGE_SIZE,  in main()
56     bzero(buf, bytes * 2 + PAGE_SIZE);  in main()
71 	buf += (bytes + PAGE_MASK) & ~PAGE_MASK;  in main()
74 	    n = read(fds[1], buf + i, bytes - i);  in main()
77 	    if (n + i == bytes)  in main()
100 	    if (write(fds[0], buf, bytes) != bytes) {  in main()
113 	    if (write(fds[0], buf, bytes) != bytes) {  in main()
121 	stop_timing(loops, "full duplex pipe / %dK bufs:", bytes / 1024);  in main()
124 		bytes,  in main()
125 		(double)loops * bytes * 1000000.0 /   in main()