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perf bench: Add sched-messaging.c: Benchmark for scheduler and IPC mechanisms based on hackbench

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This patch adds bench/sched-messaging.c.

This benchmark measures performance of scheduler and IPC
mechanisms, and is based on hackbench by Rusty Russell.

Example of usage:

  % perf bench sched messaging -g 20 -l 1000 -s
  5.432  	  	       	    	    	     # in sec

  % perf bench sched messaging                 # run with default
  options (20 sender and receiver processes per group)
  (10 groups == 400 processes run)

        Total time:0.308 sec

  % perf bench sched messaging -t -g 20	     # # be multi-thread,
  with 20 groups (20 sender and receiver threads per group)
  (20 groups == 800 threads run)

        Total time:0.582 sec

( Rusty is the original author of hackbench.c and he said the code is
  and was under the GPLv2 so fine to be merged. )

Signed-off-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: fweisbec@gmail.com
Cc: Jiri Kosina <jkosina@suse.cz>
LKML-Reference: <1257381097-4743-3-git-send-email-mitake@dcl.info.waseda.ac.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Hitoshi Mitake 2009-11-05 09:31:32 +09:00 committed by Ingo Molnar
parent c426bba069
commit e27454cc63
1 changed files with 332 additions and 0 deletions
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332
tools/perf/bench/sched-messaging.c Normal file
View file

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/*
*
* builtin-bench-messaging.c
*
* messaging: Benchmark for scheduler and IPC mechanisms
*
* Based on hackbench by Rusty Russell <rusty@rustcorp.com.au>
* Ported to perf by Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
*
*/
#include "../perf.h"
#include "../util/util.h"
#include "../util/parse-options.h"
#include "../builtin.h"
#include "bench.h"
/* Test groups of 20 processes spraying to 20 receivers */
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <sys/poll.h>
#include <limits.h>
#define DATASIZE 100
static int use_pipes = 0;
static unsigned int loops = 100;
static unsigned int thread_mode = 0;
static unsigned int num_groups = 10;
static int simple = 0;
struct sender_context {
unsigned int num_fds;
int ready_out;
int wakefd;
int out_fds[0];
};
struct receiver_context {
unsigned int num_packets;
int in_fds[2];
int ready_out;
int wakefd;
};
static void barf(const char *msg)
{
fprintf(stderr, "%s (error: %s)\n", msg, strerror(errno));
exit(1);
}
static void fdpair(int fds[2])
{
if (use_pipes) {
if (pipe(fds) == 0)
return;
} else {
if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds) == 0)
return;
}
barf(use_pipes ? "pipe()" : "socketpair()");
}
/* Block until we're ready to go */
static void ready(int ready_out, int wakefd)
{
char dummy;
struct pollfd pollfd = { .fd = wakefd, .events = POLLIN };
/* Tell them we're ready. */
if (write(ready_out, &dummy, 1) != 1)
barf("CLIENT: ready write");
/* Wait for "GO" signal */
if (poll(&pollfd, 1, -1) != 1)
barf("poll");
}
/* Sender sprays loops messages down each file descriptor */
static void *sender(struct sender_context *ctx)
{
char data[DATASIZE];
unsigned int i, j;
ready(ctx->ready_out, ctx->wakefd);
/* Now pump to every receiver. */
for (i = 0; i < loops; i++) {
for (j = 0; j < ctx->num_fds; j++) {
int ret, done = 0;
again:
ret = write(ctx->out_fds[j], data + done,
sizeof(data)-done);
if (ret < 0)
barf("SENDER: write");
done += ret;
if (done < DATASIZE)
goto again;
}
}
return NULL;
}
/* One receiver per fd */
static void *receiver(struct receiver_context* ctx)
{
unsigned int i;
if (!thread_mode)
close(ctx->in_fds[1]);
/* Wait for start... */
ready(ctx->ready_out, ctx->wakefd);
/* Receive them all */
for (i = 0; i < ctx->num_packets; i++) {
char data[DATASIZE];
int ret, done = 0;
again:
ret = read(ctx->in_fds[0], data + done, DATASIZE - done);
if (ret < 0)
barf("SERVER: read");
done += ret;
if (done < DATASIZE)
goto again;
}
return NULL;
}
static pthread_t create_worker(void *ctx, void *(*func)(void *))
{
pthread_attr_t attr;
pthread_t childid;
int err;
if (!thread_mode) {
/* process mode */
/* Fork the receiver. */
switch (fork()) {
case -1:
barf("fork()");
break;
case 0:
(*func) (ctx);
exit(0);
break;
default:
break;
}
return (pthread_t)0;
}
if (pthread_attr_init(&attr) != 0)
barf("pthread_attr_init:");
#ifndef __ia64__
if (pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN) != 0)
barf("pthread_attr_setstacksize");
#endif
err = pthread_create(&childid, &attr, func, ctx);
if (err != 0) {
fprintf(stderr, "pthread_create failed: %s (%d)\n",
strerror(err), err);
exit(-1);
}
return childid;
}
static void reap_worker(pthread_t id)
{
int proc_status;
void *thread_status;
if (!thread_mode) {
/* process mode */
wait(&proc_status);
if (!WIFEXITED(proc_status))
exit(1);
} else {
pthread_join(id, &thread_status);
}
}
/* One group of senders and receivers */
static unsigned int group(pthread_t *pth,
unsigned int num_fds,
int ready_out,
int wakefd)
{
unsigned int i;
struct sender_context *snd_ctx = malloc(sizeof(struct sender_context)
+ num_fds * sizeof(int));
if (!snd_ctx)
barf("malloc()");
for (i = 0; i < num_fds; i++) {
int fds[2];
struct receiver_context *ctx = malloc(sizeof(*ctx));
if (!ctx)
barf("malloc()");
/* Create the pipe between client and server */
fdpair(fds);
ctx->num_packets = num_fds * loops;
ctx->in_fds[0] = fds[0];
ctx->in_fds[1] = fds[1];
ctx->ready_out = ready_out;
ctx->wakefd = wakefd;
pth[i] = create_worker(ctx, (void *)receiver);
snd_ctx->out_fds[i] = fds[1];
if (!thread_mode)
close(fds[0]);
}
/* Now we have all the fds, fork the senders */
for (i = 0; i < num_fds; i++) {
snd_ctx->ready_out = ready_out;
snd_ctx->wakefd = wakefd;
snd_ctx->num_fds = num_fds;
pth[num_fds+i] = create_worker(snd_ctx, (void *)sender);
}
/* Close the fds we have left */
if (!thread_mode)
for (i = 0; i < num_fds; i++)
close(snd_ctx->out_fds[i]);
/* Return number of children to reap */
return num_fds * 2;
}
static const struct option options[] = {
OPT_BOOLEAN('p', "pipe", &use_pipes,
"Use pipe() instead of socketpair()"),
OPT_BOOLEAN('t', "thread", &thread_mode,
"Be multi thread instead of multi process"),
OPT_INTEGER('g', "group", &num_groups,
"Specify number of groups"),
OPT_INTEGER('l', "loop", &loops,
"Specify number of loops"),
OPT_BOOLEAN('s', "simple-output", &simple,
"Do simple output (this maybe useful for"
"processing by scripts or graph tools like gnuplot)"),
OPT_END()
};
static const char * const bench_sched_message_usage[] = {
"perf bench sched messaging <options>",
NULL
};
int bench_sched_messaging(int argc, const char **argv,
const char *prefix __used)
{
unsigned int i, total_children;
struct timeval start, stop, diff;
unsigned int num_fds = 20;
int readyfds[2], wakefds[2];
char dummy;
pthread_t *pth_tab;
argc = parse_options(argc, argv, options,
bench_sched_message_usage, 0);
pth_tab = malloc(num_fds * 2 * num_groups * sizeof(pthread_t));
if (!pth_tab)
barf("main:malloc()");
fdpair(readyfds);
fdpair(wakefds);
total_children = 0;
for (i = 0; i < num_groups; i++)
total_children += group(pth_tab+total_children, num_fds,
readyfds[1], wakefds[0]);
/* Wait for everyone to be ready */
for (i = 0; i < total_children; i++)
if (read(readyfds[0], &dummy, 1) != 1)
barf("Reading for readyfds");
gettimeofday(&start, NULL);
/* Kick them off */
if (write(wakefds[1], &dummy, 1) != 1)
barf("Writing to start them");
/* Reap them all */
for (i = 0; i < total_children; i++)
reap_worker(pth_tab[i]);
gettimeofday(&stop, NULL);
timersub(&stop, &start, &diff);
if (simple)
printf("%lu.%03lu\n", diff.tv_sec, diff.tv_usec/1000);
else {
printf("(%d sender and receiver %s per group)\n",
num_fds, thread_mode ? "threads" : "processes");
printf("(%d groups == %d %s run)\n\n",
num_groups, num_groups * 2 * num_fds,
thread_mode ? "threads" : "processes");
printf("\tTotal time:%lu.%03lu sec\n",
diff.tv_sec, diff.tv_usec/1000);
}
return 0;
}