mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 03:10:12 +00:00
![Pierre Gondois](/assets/img/avatar_default.png)
The musl-libc [1] defines (struct timeval).tv_sec as a 'long long' for arm and other architectures. The default build having a '-Wformat' flag, not casting the field when printing prevents from building perf. This patch casts the (struct timeval).tv_sec fields to the expected format. [1] git://git.musl-libc.org/musl Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Douglas.raillard@arm.com Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20210224182410.5366-1-Pierre.Gondois@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
329 lines
7 KiB
C
329 lines
7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
*
|
|
* 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 <subcmd/parse-options.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>
|
|
#include <linux/time64.h>
|
|
|
|
#define DATASIZE 100
|
|
|
|
static bool use_pipes = false;
|
|
static unsigned int nr_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[];
|
|
};
|
|
|
|
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)
|
|
{
|
|
struct pollfd pollfd = { .fd = wakefd, .events = POLLIN };
|
|
|
|
/* Tell them we're ready. */
|
|
if (write(ready_out, "R", 1) != 1)
|
|
err(EXIT_FAILURE, "CLIENT: ready write");
|
|
|
|
/* Wait for "GO" signal */
|
|
if (poll(&pollfd, 1, -1) != 1)
|
|
err(EXIT_FAILURE, "poll");
|
|
}
|
|
|
|
/* Sender sprays nr_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);
|
|
memset(data, 'S', sizeof(data));
|
|
|
|
/* Now pump to every receiver. */
|
|
for (i = 0; i < nr_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 * nr_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', "nr_loops", &nr_loops, "Specify the number of loops to run (default: 100)"),
|
|
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)
|
|
{
|
|
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",
|
|
(unsigned long) diff.tv_sec,
|
|
(unsigned long) (diff.tv_usec / USEC_PER_MSEC));
|
|
break;
|
|
case BENCH_FORMAT_SIMPLE:
|
|
printf("%lu.%03lu\n", (unsigned long) diff.tv_sec,
|
|
(unsigned long) (diff.tv_usec / USEC_PER_MSEC));
|
|
break;
|
|
default:
|
|
/* reaching here is something disaster */
|
|
fprintf(stderr, "Unknown format:%d\n", bench_format);
|
|
exit(1);
|
|
break;
|
|
}
|
|
|
|
free(pth_tab);
|
|
|
|
return 0;
|
|
}
|