Find file
1e2886d Feb 23, 2016
Erik Rigtorp Additional cleanups
@rigtorp @desbma
133 lines (107 sloc) 3.25 KB
/*
Measure throughput of IPC using pipes
Copyright (c) 2016 Erik Rigtorp <erik@rigtorp.se>
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
*/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <time.h>
#include <unistd.h>
#if defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0) && \
defined(_POSIX_MONOTONIC_CLOCK)
#define HAS_CLOCK_GETTIME_MONOTONIC
#endif
int main(int argc, char *argv[]) {
int fds[2];
int size;
char *buf;
int64_t count, i, delta;
#ifdef HAS_CLOCK_GETTIME_MONOTONIC
struct timespec start, stop;
#else
struct timeval start, stop;
#endif
if (argc != 3) {
printf("usage: pipe_thr <message-size> <message-count>\n");
return 1;
}
size = atoi(argv[1]);
count = atol(argv[2]);
buf = malloc(size);
if (buf == NULL) {
perror("malloc");
return 1;
}
printf("message size: %i octets\n", size);
printf("message count: %li\n", count);
if (pipe(fds) == -1) {
perror("pipe");
return 1;
}
if (!fork()) {
/* child */
for (i = 0; i < count; i++) {
if (read(fds[0], buf, size) != size) {
perror("read");
return 1;
}
}
} else {
/* parent */
#ifdef HAS_CLOCK_GETTIME_MONOTONIC
if (clock_gettime(CLOCK_MONOTONIC, &start) == -1) {
perror("clock_gettime");
return 1;
}
#else
if (gettimeofday(&start, NULL) == -1) {
perror("gettimeofday");
return 1;
}
#endif
for (i = 0; i < count; i++) {
if (write(fds[1], buf, size) != size) {
perror("write");
return 1;
}
}
#ifdef HAS_CLOCK_GETTIME_MONOTONIC
if (clock_gettime(CLOCK_MONOTONIC, &stop) == -1) {
perror("clock_gettime");
return 1;
}
delta = ((stop.tv_sec - start.tv_sec) * 1000000 +
(stop.tv_nsec - start.tv_nsec) / 1000);
#else
if (gettimeofday(&stop, NULL) == -1) {
perror("gettimeofday");
return 1;
}
delta =
(stop.tv_sec - start.tv_sec) * 1000000 + (stop.tv_usec - start.tv_usec);
#endif
printf("average throughput: %li msg/s\n", (count * 1000000) / delta);
printf("average throughput: %li Mb/s\n",
(((count * 1000000) / delta) * size * 8) / 1000000);
}
return 0;
}