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Diffstat (limited to 'src/examples/libevent-bench/bench.c')
-rw-r--r-- | src/examples/libevent-bench/bench.c | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/src/examples/libevent-bench/bench.c b/src/examples/libevent-bench/bench.c new file mode 100644 index 0000000..0e2cb08 --- /dev/null +++ b/src/examples/libevent-bench/bench.c @@ -0,0 +1,230 @@ +/* + * Copyright 2012 William Pitcock <nenolod@dereferenced.org>. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +/* + * Copyright 2003 Niels Provos <provos@citi.umich.edu> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * + * Mon 03/10/2003 - Modified by Davide Libenzi <davidel@xmailserver.org> + * + * Added chain event propagation to improve the sensitivity of + * the measure respect to the event loop efficency. + * + * + */ + +#define timersub(tvp, uvp, vvp) \ + do { \ + (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \ + (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \ + if ((vvp)->tv_usec < 0) { \ + (vvp)->tv_sec--; \ + (vvp)->tv_usec += 1000000; \ + } \ + } while (0) + +#include <mowgli.h> + + +static int count, writes, fired; +static mowgli_eventloop_t *base_eventloop; +static mowgli_descriptor_t *pipes; +static int num_pipes, num_active, num_writes; +static mowgli_eventloop_pollable_t **events; +static int timers; + +void +timer_cb(void *unused) +{ + /* nop */ +} + +void +read_cb(mowgli_eventloop_t *eventloop, mowgli_eventloop_io_t *io, mowgli_eventloop_io_dir_t dir, void *arg) +{ + mowgli_eventloop_pollable_t *pollable = mowgli_eventloop_io_pollable(io); + int idx = (int) (long) arg, widx = idx + 1; + u_char ch; + + count += read(pollable->fd, &ch, sizeof(ch)); + if (writes) { + if (widx >= num_pipes) + widx -= num_pipes; + write(pipes[2 * widx + 1], "e", 1); + writes--; + fired++; + } +} + +#if NATIVE +void +read_thunk(struct ev_io *w, int revents) +{ + read_cb (w->fd, revents, w->data); +} + +void +timer_cb (struct ev_timer *w, int revents) +{ + /* nop */ +} +#endif + +struct timeval * +run_once(void) +{ + int *cp, i, space; + static struct timeval ta, ts, te; + + gettimeofday(&ta, NULL); + for (cp = pipes, i = 0; i < num_pipes; i++, cp += 2) { + if (events[i] != NULL) + mowgli_pollable_destroy(base_eventloop, events[i]); + + events[i] = mowgli_pollable_create(base_eventloop, cp[0], (void *) (long) i); + mowgli_pollable_setselect(base_eventloop, events[i], MOWGLI_EVENTLOOP_IO_READ, read_cb); + } + + fired = 0; + space = num_pipes / num_active; + space = space * 2; + for (i = 0; i < num_active; i++, fired++) + write(pipes[i * space + 1], "e", 1); + + count = 0; + writes = num_writes; + + int xcount = 0; + gettimeofday(&ts, NULL); + do { + mowgli_eventloop_run_once(base_eventloop); + xcount++; + } while (count != fired); + + gettimeofday(&te, NULL); + + timersub(&te, &ta, &ta); + timersub(&te, &ts, &ts); + fprintf(stdout, "%ld\t%ld\n", + ta.tv_sec * 1000000L + ta.tv_usec, + ts.tv_sec * 1000000L + ts.tv_usec + ); + + return (&te); +} + +int +main (int argc, char **argv) +{ + struct rlimit rl; + int i, c; + int *cp; + extern char *optarg; + + num_pipes = 100; + num_active = 1; + num_writes = num_pipes; + while ((c = getopt(argc, argv, "n:a:w:te")) != -1) { + switch (c) { + case 'n': + num_pipes = atoi(optarg); + break; + case 'a': + num_active = atoi(optarg); + break; + case 'w': + num_writes = atoi(optarg); + break; + case 't': + timers = 1; + break; + default: + fprintf(stderr, "Illegal argument \"%c\"\n", c); + exit(1); + } + } + +#if 1 + rl.rlim_cur = rl.rlim_max = num_pipes * 2 + 50; + if (setrlimit(RLIMIT_NOFILE, &rl) == -1) { + perror("setrlimit"); + } +#endif + + events = calloc(num_pipes * 2, sizeof(mowgli_eventloop_pollable_t *)); + pipes = calloc(num_pipes * 2, sizeof(mowgli_descriptor_t)); + if (events == NULL || pipes == NULL) { + perror("malloc"); + exit(1); + } + + mowgli_thread_set_policy(MOWGLI_THREAD_POLICY_DISABLED); + base_eventloop = mowgli_eventloop_create(); + + for (cp = pipes, i = 0; i < num_pipes; i++, cp += 2) { +#ifdef USE_PIPES + if (pipe(cp) == -1) { +#else + if (socketpair(AF_UNIX, SOCK_STREAM, 0, cp) == -1) { +#endif + perror("pipe"); + exit(1); + } + } + + for (i = 0; i < 2; i++) { + run_once(); + } + + exit(0); +} |