/* $NetBSD: bench.c,v 1.1.1.3 2021/04/07 02:43:15 christos Exp $ */ /* * Copyright 2003-2007 Niels Provos * Copyright 2007-2012 Niels Provos and Nick Mathewson * * 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 * * Added chain event propagation to improve the sensitivity of * the measure respect to the event loop efficency. * * */ #include "event2/event-config.h" #include __RCSID("$NetBSD: bench.c,v 1.1.1.3 2021/04/07 02:43:15 christos Exp $"); #include "../util-internal.h" #include #include #ifdef EVENT__HAVE_SYS_TIME_H #include #endif #ifdef _WIN32 #define WIN32_LEAN_AND_MEAN #include #else #include #include #include #endif #include #include #include #include #ifdef EVENT__HAVE_UNISTD_H #include #endif #include #ifdef _WIN32 #include #endif #include #include static ev_ssize_t count, fired; static int writes, failures; static evutil_socket_t *pipes; static int num_pipes, num_active, num_writes; static struct event *events; static struct event_base *base; static void read_cb(evutil_socket_t fd, short which, void *arg) { ev_intptr_t idx = (ev_intptr_t) arg, widx = idx + 1; unsigned char ch; ev_ssize_t n; n = recv(fd, (char*)&ch, sizeof(ch), 0); if (n >= 0) count += n; else failures++; if (writes) { if (widx >= num_pipes) widx -= num_pipes; n = send(pipes[2 * widx + 1], "e", 1, 0); if (n != 1) failures++; writes--; fired++; } } static struct timeval * run_once(void) { evutil_socket_t *cp, space; long i; static struct timeval ts, te; for (cp = pipes, i = 0; i < num_pipes; i++, cp += 2) { if (event_initialized(&events[i])) event_del(&events[i]); event_assign(&events[i], base, cp[0], EV_READ | EV_PERSIST, read_cb, (void *)(ev_intptr_t) i); event_add(&events[i], NULL); } event_base_loop(base, EVLOOP_ONCE | EVLOOP_NONBLOCK); fired = 0; space = num_pipes / num_active; space = space * 2; for (i = 0; i < num_active; i++, fired++) (void) send(pipes[i * space + 1], "e", 1, 0); count = 0; writes = num_writes; { int xcount = 0; evutil_gettimeofday(&ts, NULL); do { event_base_loop(base, EVLOOP_ONCE | EVLOOP_NONBLOCK); xcount++; } while (count != fired); evutil_gettimeofday(&te, NULL); if (xcount != count) fprintf(stderr, "Xcount: %d, Rcount: " EV_SSIZE_FMT "\n", xcount, count); } evutil_timersub(&te, &ts, &te); return (&te); } int main(int argc, char **argv) { #ifdef EVENT__HAVE_SETRLIMIT struct rlimit rl; #endif int i, c; struct timeval *tv; evutil_socket_t *cp; const char **methods; const char *method = NULL; struct event_config *cfg = NULL; #ifdef _WIN32 WSADATA WSAData; WSAStartup(0x101, &WSAData); #endif num_pipes = 100; num_active = 1; num_writes = num_pipes; while ((c = getopt(argc, argv, "n:a:w:m:l")) != -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 'm': method = optarg; break; case 'l': methods = event_get_supported_methods(); fprintf(stdout, "Using Libevent %s. Available methods are:\n", event_get_version()); for (i = 0; methods[i] != NULL; ++i) printf(" %s\n", methods[i]); exit(0); default: fprintf(stderr, "Illegal argument \"%c\"\n", c); exit(1); } } #ifdef EVENT__HAVE_SETRLIMIT rl.rlim_cur = rl.rlim_max = num_pipes * 2 + 50; if (setrlimit(RLIMIT_NOFILE, &rl) == -1) { perror("setrlimit"); exit(1); } #endif events = calloc(num_pipes, sizeof(struct event)); pipes = calloc(num_pipes * 2, sizeof(evutil_socket_t)); if (events == NULL || pipes == NULL) { perror("malloc"); exit(1); } if (method != NULL) { cfg = event_config_new(); methods = event_get_supported_methods(); for (i = 0; methods[i] != NULL; ++i) if (strcmp(methods[i], method)) event_config_avoid_method(cfg, methods[i]); base = event_base_new_with_config(cfg); event_config_free(cfg); } else base = event_base_new(); for (cp = pipes, i = 0; i < num_pipes; i++, cp += 2) { #ifdef USE_PIPES if (pipe(cp) == -1) { #else if (evutil_socketpair(AF_UNIX, SOCK_STREAM, 0, cp) == -1) { #endif perror("pipe"); exit(1); } } for (i = 0; i < 25; i++) { tv = run_once(); if (tv == NULL) exit(1); fprintf(stdout, "%ld\n", tv->tv_sec * 1000000L + tv->tv_usec); } exit(0); }