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/* $NetBSD: h_stresscli.c,v 1.9 2011/06/26 13:17:36 christos Exp $ */
#include <sys/types.h>
#include <sys/atomic.h>
#include <sys/sysctl.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <err.h>
#include <fcntl.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <rump/rump_syscalls.h>
#include <rump/rumpclient.h>
static unsigned int syscalls, bindcalls;
static pid_t mypid;
static volatile sig_atomic_t doquit;
static void
signaali(int sig)
{
doquit = 1;
}
static const int hostnamemib[] = { CTL_KERN, KERN_HOSTNAME };
static char hostnamebuf[128];
#define HOSTNAMEBASE "rumpclient"
static int iskiller;
static void *
client(void *arg)
{
char buf[256];
struct sockaddr_in sin;
size_t blen;
int port = (int)(uintptr_t)arg;
int s, fd, x;
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_len = sizeof(sin);
sin.sin_port = htons(port);
while (!doquit) {
pid_t pidi;
blen = sizeof(buf);
s = rump_sys_socket(PF_INET, SOCK_STREAM, 0);
if (s == -1)
err(1, "socket");
atomic_inc_uint(&syscalls);
fd = rump_sys_open("/dev/null", O_RDWR);
atomic_inc_uint(&syscalls);
if (doquit)
goto out;
x = 1;
if (rump_sys_setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
&x, sizeof(x)) == -1)
err(1, "reuseaddr");
/*
* we don't really know when the kernel handles our disconnect,
* so be soft about about the failure in case of a killer client
*/
if (rump_sys_bind(s, (struct sockaddr*)&sin, sizeof(sin))==-1) {
if (!iskiller)
err(1, "bind to port %d failed",
ntohs(sin.sin_port));
} else {
atomic_inc_uint(&bindcalls);
}
atomic_inc_uint(&syscalls);
if (doquit)
goto out;
if (rump_sys___sysctl(hostnamemib, __arraycount(hostnamemib),
buf, &blen, NULL, 0) == -1)
err(1, "sysctl");
if (strncmp(buf, hostnamebuf, sizeof(HOSTNAMEBASE)-1) != 0)
errx(1, "hostname (%s/%s) mismatch", buf, hostnamebuf);
atomic_inc_uint(&syscalls);
if (doquit)
goto out;
pidi = rump_sys_getpid();
if (pidi == -1)
err(1, "getpid");
if (pidi != mypid)
errx(1, "mypid mismatch");
atomic_inc_uint(&syscalls);
if (doquit)
goto out;
if (rump_sys_write(fd, buf, 16) != 16)
err(1, "write /dev/null");
atomic_inc_uint(&syscalls);
out:
rump_sys_close(fd);
atomic_inc_uint(&syscalls);
rump_sys_close(s);
atomic_inc_uint(&syscalls);
}
return NULL;
}
/* Stress with max 32 clients, 8 threads each (256 concurrent threads) */
#define NCLI 32
#define NTHR 8
int
main(int argc, char *argv[])
{
pthread_t pt[NTHR-1];
pid_t clis[NCLI];
pid_t apid;
int ncli = 0;
int i = 0, j;
int status, thesig;
int rounds, myport;
if (argc != 2 && argc != 3)
errx(1, "need roundcount");
if (argc == 3) {
if (strcmp(argv[2], "kill") != 0)
errx(1, "optional 3rd param must be kill");
thesig = SIGKILL;
iskiller = 1;
} else {
thesig = SIGUSR1;
}
signal(SIGUSR1, signaali);
memset(clis, 0, sizeof(clis));
for (rounds = 1; rounds < atoi(argv[1])*10; rounds++) {
while (ncli < NCLI) {
switch ((apid = fork())) {
case -1:
err(1, "fork failed");
case 0:
if (rumpclient_init() == -1)
err(1, "rumpclient init");
mypid = rump_sys_getpid();
sprintf(hostnamebuf, HOSTNAMEBASE "%d", mypid);
if (rump_sys___sysctl(hostnamemib,
__arraycount(hostnamemib), NULL, NULL,
hostnamebuf, strlen(hostnamebuf)+1) == -1)
err(1, "sethostname");
for (j = 0; j < NTHR-1; j++) {
myport = i*NCLI + j+2;
if (pthread_create(&pt[j], NULL,
client,
(void*)(uintptr_t)myport) !=0 )
err(1, "pthread create");
}
myport = i*NCLI+1;
client((void *)(uintptr_t)myport);
for (j = 0; j < NTHR-1; j++)
pthread_join(pt[j], NULL);
membar_consumer();
fprintf(stderr, "done %d\n", syscalls);
exit(0);
/* NOTREACHED */
default:
ncli++;
clis[i] = apid;
break;
}
i = (i + 1) % NCLI;
}
usleep(100000);
kill(clis[i], thesig);
apid = wait(&status);
if (apid != clis[i])
errx(1, "wanted pid %d, got %d\n", clis[i], apid);
clis[i] = 0;
ncli--;
if (thesig == SIGUSR1) {
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
fprintf(stderr, "child died with 0x%x\n",
status);
exit(1);
}
} else {
if (!WIFSIGNALED(status) || WTERMSIG(status) != thesig){
fprintf(stderr, "child died with 0x%x\n",
status);
exit(1);
}
}
}
for (i = 0; i < NCLI; i++)
if (clis[i])
kill(clis[i], SIGKILL);
}
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