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usr.sbin/bhyvearm/mevent_test.c

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/*-
* Copyright (c) 2011 NetApp, Inc.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``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 NETAPP, INC OR CONTRIBUTORS 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.
*
* $FreeBSD$
*/
/*
* Test program for the micro event library. Set up a simple TCP echo
* service.
*
* cc mevent_test.c mevent.c -lpthread
*/
#include <sys/types.h>
#include <sys/stdint.h>
#include <sys/sysctl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <machine/cpufunc.h>
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <unistd.h>
#include "mevent.h"
#define TEST_PORT 4321
static pthread_mutex_t accept_mutex = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t accept_condvar = PTHREAD_COND_INITIALIZER;
static struct mevent *tevp;
char *vmname = "test vm";
#define MEVENT_ECHO
/* Number of timer events to capture */
#define TEVSZ 4096
uint64_t tevbuf[TEVSZ];
static void
timer_print(void)
{
uint64_t min, max, diff, sum, tsc_freq;
size_t len;
int j;
min = UINT64_MAX;
max = 0;
sum = 0;
len = sizeof(tsc_freq);
sysctlbyname("machdep.tsc_freq", &tsc_freq, &len, NULL, 0);
for (j = 1; j < TEVSZ; j++) {
/* Convert a tsc diff into microseconds */
diff = (tevbuf[j] - tevbuf[j-1]) * 1000000 / tsc_freq;
sum += diff;
if (min > diff)
min = diff;
if (max < diff)
max = diff;
}
printf("timers done: usecs, min %ld, max %ld, mean %ld\n", min, max,
sum/(TEVSZ - 1));
}
static void
timer_callback(int fd, enum ev_type type, void *param)
{
static int i;
if (i >= TEVSZ)
abort();
tevbuf[i++] = rdtsc();
if (i == TEVSZ) {
mevent_delete(tevp);
timer_print();
}
}
#ifdef MEVENT_ECHO
struct esync {
pthread_mutex_t e_mt;
pthread_cond_t e_cond;
};
static void
echoer_callback(int fd, enum ev_type type, void *param)
{
struct esync *sync = param;
pthread_mutex_lock(&sync->e_mt);
pthread_cond_signal(&sync->e_cond);
pthread_mutex_unlock(&sync->e_mt);
}
static void *
echoer(void *param)
{
struct esync sync;
struct mevent *mev;
char buf[128];
int fd = (int)(uintptr_t) param;
int len;
pthread_mutex_init(&sync.e_mt, NULL);
pthread_cond_init(&sync.e_cond, NULL);
pthread_mutex_lock(&sync.e_mt);
mev = mevent_add(fd, EVF_READ, echoer_callback, &sync);
if (mev == NULL) {
printf("Could not allocate echoer event\n");
exit(1);
}
while (!pthread_cond_wait(&sync.e_cond, &sync.e_mt)) {
len = read(fd, buf, sizeof(buf));
if (len > 0) {
write(fd, buf, len);
write(0, buf, len);
} else {
break;
}
}
mevent_delete_close(mev);
pthread_mutex_unlock(&sync.e_mt);
pthread_mutex_destroy(&sync.e_mt);
pthread_cond_destroy(&sync.e_cond);
return (NULL);
}
#else
static void *
echoer(void *param)
{
char buf[128];
int fd = (int)(uintptr_t) param;
int len;
while ((len = read(fd, buf, sizeof(buf))) > 0) {
write(1, buf, len);
}
return (NULL);
}
#endif /* MEVENT_ECHO */
static void
acceptor_callback(int fd, enum ev_type type, void *param)
{
pthread_mutex_lock(&accept_mutex);
pthread_cond_signal(&accept_condvar);
pthread_mutex_unlock(&accept_mutex);
}
static void *
acceptor(void *param)
{
struct sockaddr_in sin;
pthread_t tid;
int news;
int s;
static int first;
if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
perror("socket");
exit(1);
}
sin.sin_len = sizeof(sin);
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = htonl(INADDR_ANY);
sin.sin_port = htons(TEST_PORT);
if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
perror("bind");
exit(1);
}
if (listen(s, 1) < 0) {
perror("listen");
exit(1);
}
(void) mevent_add(s, EVF_READ, acceptor_callback, NULL);
pthread_mutex_lock(&accept_mutex);
while (!pthread_cond_wait(&accept_condvar, &accept_mutex)) {
news = accept(s, NULL, NULL);
if (news < 0) {
perror("accept error");
} else {
static int first = 1;
if (first) {
/*
* Start a timer
*/
first = 0;
tevp = mevent_add(1, EVF_TIMER, timer_callback,
NULL);
}
printf("incoming connection, spawning thread\n");
pthread_create(&tid, NULL, echoer,
(void *)(uintptr_t)news);
}
}
return (NULL);
}
main()
{
pthread_t tid;
pthread_create(&tid, NULL, acceptor, NULL);
mevent_dispatch();
}