perf bench: Add sched-messaging.c: Benchmark for scheduler and IPC mechanisms based on hackbench
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
Ingo Molnar
parent
c426bba069
commit
e27454cc63
1 changed files with 332 additions and 0 deletions
332
tools/perf/bench/sched-messaging.c
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332
tools/perf/bench/sched-messaging.c
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/*
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*
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* builtin-bench-messaging.c
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*
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* messaging: Benchmark for scheduler and IPC mechanisms
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*
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* Based on hackbench by Rusty Russell <rusty@rustcorp.com.au>
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* Ported to perf by Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
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*
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*/
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#include "../perf.h"
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#include "../util/util.h"
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#include "../util/parse-options.h"
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#include "../builtin.h"
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#include "bench.h"
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/* Test groups of 20 processes spraying to 20 receivers */
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/wait.h>
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#include <sys/time.h>
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#include <sys/poll.h>
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#include <limits.h>
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#define DATASIZE 100
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static int use_pipes = 0;
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static unsigned int loops = 100;
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static unsigned int thread_mode = 0;
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static unsigned int num_groups = 10;
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static int simple = 0;
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struct sender_context {
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unsigned int num_fds;
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int ready_out;
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int wakefd;
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int out_fds[0];
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};
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struct receiver_context {
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unsigned int num_packets;
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int in_fds[2];
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int ready_out;
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int wakefd;
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};
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static void barf(const char *msg)
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{
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fprintf(stderr, "%s (error: %s)\n", msg, strerror(errno));
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exit(1);
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}
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static void fdpair(int fds[2])
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{
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if (use_pipes) {
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if (pipe(fds) == 0)
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return;
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} else {
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if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds) == 0)
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return;
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}
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barf(use_pipes ? "pipe()" : "socketpair()");
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}
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/* Block until we're ready to go */
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static void ready(int ready_out, int wakefd)
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{
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char dummy;
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struct pollfd pollfd = { .fd = wakefd, .events = POLLIN };
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/* Tell them we're ready. */
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if (write(ready_out, &dummy, 1) != 1)
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barf("CLIENT: ready write");
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/* Wait for "GO" signal */
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if (poll(&pollfd, 1, -1) != 1)
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barf("poll");
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}
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/* Sender sprays loops messages down each file descriptor */
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static void *sender(struct sender_context *ctx)
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{
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char data[DATASIZE];
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unsigned int i, j;
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ready(ctx->ready_out, ctx->wakefd);
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/* Now pump to every receiver. */
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for (i = 0; i < loops; i++) {
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for (j = 0; j < ctx->num_fds; j++) {
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int ret, done = 0;
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again:
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ret = write(ctx->out_fds[j], data + done,
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sizeof(data)-done);
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if (ret < 0)
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barf("SENDER: write");
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done += ret;
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if (done < DATASIZE)
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goto again;
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}
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}
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return NULL;
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}
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/* One receiver per fd */
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static void *receiver(struct receiver_context* ctx)
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{
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unsigned int i;
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if (!thread_mode)
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close(ctx->in_fds[1]);
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/* Wait for start... */
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ready(ctx->ready_out, ctx->wakefd);
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/* Receive them all */
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for (i = 0; i < ctx->num_packets; i++) {
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char data[DATASIZE];
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int ret, done = 0;
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again:
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ret = read(ctx->in_fds[0], data + done, DATASIZE - done);
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if (ret < 0)
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barf("SERVER: read");
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done += ret;
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if (done < DATASIZE)
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goto again;
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}
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return NULL;
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}
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static pthread_t create_worker(void *ctx, void *(*func)(void *))
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{
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pthread_attr_t attr;
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pthread_t childid;
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int err;
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if (!thread_mode) {
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/* process mode */
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/* Fork the receiver. */
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switch (fork()) {
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case -1:
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barf("fork()");
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break;
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case 0:
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(*func) (ctx);
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exit(0);
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break;
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default:
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break;
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}
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return (pthread_t)0;
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}
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if (pthread_attr_init(&attr) != 0)
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barf("pthread_attr_init:");
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#ifndef __ia64__
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if (pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN) != 0)
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barf("pthread_attr_setstacksize");
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#endif
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err = pthread_create(&childid, &attr, func, ctx);
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if (err != 0) {
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fprintf(stderr, "pthread_create failed: %s (%d)\n",
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strerror(err), err);
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exit(-1);
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}
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return childid;
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}
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static void reap_worker(pthread_t id)
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{
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int proc_status;
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void *thread_status;
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if (!thread_mode) {
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/* process mode */
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wait(&proc_status);
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if (!WIFEXITED(proc_status))
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exit(1);
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} else {
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pthread_join(id, &thread_status);
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}
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}
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/* One group of senders and receivers */
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static unsigned int group(pthread_t *pth,
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unsigned int num_fds,
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int ready_out,
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int wakefd)
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{
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unsigned int i;
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struct sender_context *snd_ctx = malloc(sizeof(struct sender_context)
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+ num_fds * sizeof(int));
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if (!snd_ctx)
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barf("malloc()");
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for (i = 0; i < num_fds; i++) {
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int fds[2];
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struct receiver_context *ctx = malloc(sizeof(*ctx));
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if (!ctx)
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barf("malloc()");
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/* Create the pipe between client and server */
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fdpair(fds);
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ctx->num_packets = num_fds * loops;
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ctx->in_fds[0] = fds[0];
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ctx->in_fds[1] = fds[1];
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ctx->ready_out = ready_out;
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ctx->wakefd = wakefd;
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pth[i] = create_worker(ctx, (void *)receiver);
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snd_ctx->out_fds[i] = fds[1];
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if (!thread_mode)
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close(fds[0]);
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}
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/* Now we have all the fds, fork the senders */
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for (i = 0; i < num_fds; i++) {
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snd_ctx->ready_out = ready_out;
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snd_ctx->wakefd = wakefd;
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snd_ctx->num_fds = num_fds;
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pth[num_fds+i] = create_worker(snd_ctx, (void *)sender);
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}
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/* Close the fds we have left */
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if (!thread_mode)
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for (i = 0; i < num_fds; i++)
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close(snd_ctx->out_fds[i]);
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/* Return number of children to reap */
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return num_fds * 2;
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}
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static const struct option options[] = {
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OPT_BOOLEAN('p', "pipe", &use_pipes,
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"Use pipe() instead of socketpair()"),
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OPT_BOOLEAN('t', "thread", &thread_mode,
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"Be multi thread instead of multi process"),
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OPT_INTEGER('g', "group", &num_groups,
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"Specify number of groups"),
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OPT_INTEGER('l', "loop", &loops,
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"Specify number of loops"),
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OPT_BOOLEAN('s', "simple-output", &simple,
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"Do simple output (this maybe useful for"
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"processing by scripts or graph tools like gnuplot)"),
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OPT_END()
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};
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static const char * const bench_sched_message_usage[] = {
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"perf bench sched messaging <options>",
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NULL
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};
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int bench_sched_messaging(int argc, const char **argv,
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const char *prefix __used)
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{
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unsigned int i, total_children;
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struct timeval start, stop, diff;
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unsigned int num_fds = 20;
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int readyfds[2], wakefds[2];
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char dummy;
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pthread_t *pth_tab;
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argc = parse_options(argc, argv, options,
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bench_sched_message_usage, 0);
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pth_tab = malloc(num_fds * 2 * num_groups * sizeof(pthread_t));
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if (!pth_tab)
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barf("main:malloc()");
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fdpair(readyfds);
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fdpair(wakefds);
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total_children = 0;
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for (i = 0; i < num_groups; i++)
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total_children += group(pth_tab+total_children, num_fds,
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readyfds[1], wakefds[0]);
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/* Wait for everyone to be ready */
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for (i = 0; i < total_children; i++)
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if (read(readyfds[0], &dummy, 1) != 1)
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barf("Reading for readyfds");
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gettimeofday(&start, NULL);
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/* Kick them off */
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if (write(wakefds[1], &dummy, 1) != 1)
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barf("Writing to start them");
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/* Reap them all */
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for (i = 0; i < total_children; i++)
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reap_worker(pth_tab[i]);
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gettimeofday(&stop, NULL);
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timersub(&stop, &start, &diff);
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if (simple)
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printf("%lu.%03lu\n", diff.tv_sec, diff.tv_usec/1000);
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else {
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printf("(%d sender and receiver %s per group)\n",
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num_fds, thread_mode ? "threads" : "processes");
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printf("(%d groups == %d %s run)\n\n",
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num_groups, num_groups * 2 * num_fds,
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thread_mode ? "threads" : "processes");
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printf("\tTotal time:%lu.%03lu sec\n",
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diff.tv_sec, diff.tv_usec/1000);
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}
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return 0;
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}
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