--- /dev/null
+/*
+ *
+ * sched-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 <poll.h>
+#include <limits.h>
+#include <err.h>
+
+#define DATASIZE 100
+
+static bool use_pipes = false;
+static unsigned int loops = 100;
+static bool thread_mode = false;
+static unsigned int num_groups = 10;
+
+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 fdpair(int fds[2])
+{
+ if (use_pipes) {
+ if (pipe(fds) == 0)
+ return;
+ } else {
+ if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds) == 0)
+ return;
+ }
+
+ err(EXIT_FAILURE, 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)
+ err(EXIT_FAILURE, "CLIENT: ready write");
+
+ /* Wait for "GO" signal */
+ if (poll(&pollfd, 1, -1) != 1)
+ err(EXIT_FAILURE, "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)
+ err(EXIT_FAILURE, "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)
+ err(EXIT_FAILURE, "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 ret;
+
+ if (!thread_mode) {
+ /* process mode */
+ /* Fork the receiver. */
+ switch (fork()) {
+ case -1:
+ err(EXIT_FAILURE, "fork()");
+ break;
+ case 0:
+ (*func) (ctx);
+ exit(0);
+ break;
+ default:
+ break;
+ }
+
+ return (pthread_t)0;
+ }
+
+ if (pthread_attr_init(&attr) != 0)
+ err(EXIT_FAILURE, "pthread_attr_init:");
+
+#ifndef __ia64__
+ if (pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN) != 0)
+ err(EXIT_FAILURE, "pthread_attr_setstacksize");
+#endif
+
+ ret = pthread_create(&childid, &attr, func, ctx);
+ if (ret != 0)
+ err(EXIT_FAILURE, "pthread_create failed");
+
+ 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)
+ err(EXIT_FAILURE, "malloc()");
+
+ for (i = 0; i < num_fds; i++) {
+ int fds[2];
+ struct receiver_context *ctx = malloc(sizeof(*ctx));
+
+ if (!ctx)
+ err(EXIT_FAILURE, "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_UINTEGER('g', "group", &num_groups, "Specify number of groups"),
+ OPT_UINTEGER('l', "loop", &loops, "Specify number of loops"),
+ 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 __maybe_unused)
+{
+ 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)
+ err(EXIT_FAILURE, "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)
+ err(EXIT_FAILURE, "Reading for readyfds");
+
+ gettimeofday(&start, NULL);
+
+ /* Kick them off */
+ if (write(wakefds[1], &dummy, 1) != 1)
+ err(EXIT_FAILURE, "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);
+
+ switch (bench_format) {
+ case BENCH_FORMAT_DEFAULT:
+ 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(" %14s: %lu.%03lu [sec]\n", "Total time",
+ diff.tv_sec,
+ (unsigned long) (diff.tv_usec/1000));
+ break;
+ case BENCH_FORMAT_SIMPLE:
+ printf("%lu.%03lu\n", diff.tv_sec,
+ (unsigned long) (diff.tv_usec/1000));
+ break;
+ default:
+ /* reaching here is something disaster */
+ fprintf(stderr, "Unknown format:%d\n", bench_format);
+ exit(1);
+ break;
+ }
+
+ free(pth_tab);
+
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff