src/libsystemd/sd-bus/test-bus-kernel-benchmark.c - systemd-stable - Rivoreo Source Code Repositories

 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

 /***
   This file is part of systemd.

   Copyright 2013 Lennart Poettering

   systemd is free software; you can redistribute it and/or modify it
   under the terms of the GNU Lesser General Public License as published by
   the Free Software Foundation; either version 2.1 of the License, or
   (at your option) any later version.

   systemd is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/

 #include <ctype.h>
 #include <sys/wait.h>

 #include "util.h"
 #include "log.h"
 #include "time-util.h"

 #include "sd-bus.h"
 #include "bus-message.h"
 #include "bus-error.h"
 #include "bus-kernel.h"
 #include "bus-internal.h"
 #include "bus-util.h"

 #define MAX_SIZE (4*1024*1024)

 static usec_t arg_loop_usec = 100 * USEC_PER_MSEC;

 static void server(sd_bus *b, size_t *result) {
         int r;

         for (;;) {
                 _cleanup_bus_message_unref_ sd_bus_message *m = NULL;

                 r = sd_bus_process(b, &m);
                 assert_se(r >= 0);

                 if (r == 0)
                         assert_se(sd_bus_wait(b, (usec_t) -1) >= 0);
                 if (!m)
                         continue;

                 if (sd_bus_message_is_method_call(m, "benchmark.server", "Ping"))
                         assert_se(sd_bus_reply_method_return(m, NULL) >= 0);
                 else if (sd_bus_message_is_method_call(m, "benchmark.server", "Work")) {
                         const void *p;
                         size_t sz;

                         /* Make sure the mmap is mapped */
                         assert_se(sd_bus_message_read_array(m, 'y', &p, &sz) > 0);

                         assert_se(sd_bus_reply_method_return(m, NULL) >= 0);
                 } else if (sd_bus_message_is_method_call(m, "benchmark.server", "Exit")) {
                         uint64_t res;
                         assert_se(sd_bus_message_read(m, "t", &res) > 0);

                         *result = res;
                         return;

                 } else
                         assert_not_reached("Unknown method");
         }
 }

 static void transaction(sd_bus *b, size_t sz) {
         _cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
         uint8_t *p;

         assert_se(sd_bus_message_new_method_call(b, &m, ":1.1", "/", "benchmark.server", "Work") >= 0);
         assert_se(sd_bus_message_append_array_space(m, 'y', sz, (void**) &p) >= 0);

         memset(p, 0x80, sz);

         assert_se(sd_bus_call(b, m, 0, NULL, &reply) >= 0);
 }

 static void client_bisect(const char *address) {
         _cleanup_bus_message_unref_ sd_bus_message *x = NULL;
         size_t lsize, rsize, csize;
         sd_bus *b;
         int r;

         r = sd_bus_new(&b);
         assert_se(r >= 0);

         r = sd_bus_set_address(b, address);
         assert_se(r >= 0);

         r = sd_bus_start(b);
         assert_se(r >= 0);

         assert_se(sd_bus_call_method(b, ":1.1", "/", "benchmark.server", "Ping", NULL, NULL, NULL) >= 0);

         lsize = 1;
         rsize = MAX_SIZE;

         printf("SIZE\tCOPY\tMEMFD\n");

         for (;;) {
                 usec_t t;
                 unsigned n_copying, n_memfd;

                 csize = (lsize + rsize) / 2;

                 if (csize <= lsize)
                         break;

                 if (csize <= 0)
                         break;

                 printf("%zu\t", csize);

                 b->use_memfd = 0;

                 t = now(CLOCK_MONOTONIC);
                 for (n_copying = 0;; n_copying++) {
                         transaction(b, csize);
                         if (now(CLOCK_MONOTONIC) >= t + arg_loop_usec)
                                 break;
                 }
                 printf("%u\t", (unsigned) ((n_copying * USEC_PER_SEC) / arg_loop_usec));

                 b->use_memfd = -1;

                 t = now(CLOCK_MONOTONIC);
                 for (n_memfd = 0;; n_memfd++) {
                         transaction(b, csize);
                         if (now(CLOCK_MONOTONIC) >= t + arg_loop_usec)
                                 break;
                 }
                 printf("%u\n", (unsigned) ((n_memfd * USEC_PER_SEC) / arg_loop_usec));

                 if (n_copying == n_memfd)
                         break;

                 if (n_copying > n_memfd)
                         lsize = csize;
                 else
                         rsize = csize;
         }

         b->use_memfd = 1;
         assert_se(sd_bus_message_new_method_call(b, &x, ":1.1", "/", "benchmark.server", "Exit") >= 0);
         assert_se(sd_bus_message_append(x, "t", csize) >= 0);
         assert_se(sd_bus_send(b, x, NULL) >= 0);

         sd_bus_unref(b);
 }

 static void client_chart(const char *address) {
         _cleanup_bus_message_unref_ sd_bus_message *x = NULL;
         size_t csize;
         sd_bus *b;
         int r;

         r = sd_bus_new(&b);
         assert_se(r >= 0);

         r = sd_bus_set_address(b, address);
         assert_se(r >= 0);

         r = sd_bus_start(b);
         assert_se(r >= 0);

         assert_se(sd_bus_call_method(b, ":1.1", "/", "benchmark.server", "Ping", NULL, NULL, NULL) >= 0);

         printf("SIZE\tCOPY\tMEMFD\n");

         for (csize = 1; csize <= MAX_SIZE; csize *= 2) {
                 usec_t t;
                 unsigned n_copying, n_memfd;

                 printf("%zu\t", csize);

                 b->use_memfd = 0;

                 t = now(CLOCK_MONOTONIC);
                 for (n_copying = 0;; n_copying++) {
                         transaction(b, csize);
                         if (now(CLOCK_MONOTONIC) >= t + arg_loop_usec)
                                 break;
                 }

                 printf("%u\t", (unsigned) ((n_copying * USEC_PER_SEC) / arg_loop_usec));

                 b->use_memfd = -1;

                 t = now(CLOCK_MONOTONIC);
                 for (n_memfd = 0;; n_memfd++) {
                         transaction(b, csize);
                         if (now(CLOCK_MONOTONIC) >= t + arg_loop_usec)
                                 break;
                 }

                 printf("%u\n", (unsigned) ((n_memfd * USEC_PER_SEC) / arg_loop_usec));
         }

         b->use_memfd = 1;
         assert_se(sd_bus_message_new_method_call(b, &x, ":1.1", "/", "benchmark.server", "Exit") >= 0);
         assert_se(sd_bus_message_append(x, "t", csize) >= 0);
         assert_se(sd_bus_send(b, x, NULL) >= 0);

         sd_bus_unref(b);
 }

 int main(int argc, char *argv[]) {
         enum {
                 MODE_BISECT,
                 MODE_CHART,
         } mode = MODE_BISECT;
         int i;
         _cleanup_free_ char *name = NULL, *bus_name = NULL, *address = NULL;
         _cleanup_close_ int bus_ref = -1;
         cpu_set_t cpuset;
         size_t result;
         sd_bus *b;
         pid_t pid;
         int r;

         for (i = 1; i < argc; i++) {
                 if (streq(argv[i], "chart")) {
                         mode = MODE_CHART;
                         continue;
                 }

                 assert_se(parse_sec(argv[i], &arg_loop_usec) >= 0);
         }

         assert_se(arg_loop_usec > 0);

         assert_se(asprintf(&name, "deine-mutter-%u", (unsigned) getpid()) >= 0);

         bus_ref = bus_kernel_create_bus(name, false, &bus_name);
         if (bus_ref == -ENOENT)
                 exit(EXIT_TEST_SKIP);

         assert_se(bus_ref >= 0);

         address = strappend("kernel:path=", bus_name);
         assert_se(address);

         r = sd_bus_new(&b);
         assert_se(r >= 0);

         r = sd_bus_set_address(b, address);
         assert_se(r >= 0);

         r = sd_bus_start(b);
         assert_se(r >= 0);

         sync();
         setpriority(PRIO_PROCESS, 0, -19);

         pid = fork();
         assert_se(pid >= 0);

         if (pid == 0) {
                 CPU_ZERO(&cpuset);
                 CPU_SET(0, &cpuset);
                 pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);

                 safe_close(bus_ref);
                 sd_bus_unref(b);

                 switch (mode) {
                 case MODE_BISECT:
                         client_bisect(address);
                         break;

                 case MODE_CHART:
                         client_chart(address);
                         break;
                 }

                 _exit(0);
         }

         CPU_ZERO(&cpuset);
         CPU_SET(1, &cpuset);
         pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);

         server(b, &result);

         if (mode == MODE_BISECT)
                 printf("Copying/memfd are equally fast at %zu bytes\n", result);

         assert_se(waitpid(pid, NULL, 0) == pid);

         sd_bus_unref(b);

         return 0;
 }
	/-- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil --/

	/***
	This file is part of systemd.

	Copyright 2013 Lennart Poettering

	systemd is free software; you can redistribute it and/or modify it
	under the terms of the GNU Lesser General Public License as published by
	the Free Software Foundation; either version 2.1 of the License, or
	(at your option) any later version.

	systemd is distributed in the hope that it will be useful, but
	WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public License
	along with systemd; If not, see <http://www.gnu.org/licenses/>.
	***/

	#include <ctype.h>
	#include <sys/wait.h>

	#include "util.h"
	#include "log.h"
	#include "time-util.h"

	#include "sd-bus.h"
	#include "bus-message.h"
	#include "bus-error.h"
	#include "bus-kernel.h"
	#include "bus-internal.h"
	#include "bus-util.h"

	#define MAX_SIZE (410241024)

	static usec_t arg_loop_usec = 100 * USEC_PER_MSEC;

	static void server(sd_bus b, size_t result) {
	int r;

	for (;;) {
	_cleanup_bus_message_unref_ sd_bus_message *m = NULL;

	r = sd_bus_process(b, &m);
	assert_se(r >= 0);

	if (r == 0)
	assert_se(sd_bus_wait(b, (usec_t) -1) >= 0);
	if (!m)
	continue;

	if (sd_bus_message_is_method_call(m, "benchmark.server", "Ping"))
	assert_se(sd_bus_reply_method_return(m, NULL) >= 0);
	else if (sd_bus_message_is_method_call(m, "benchmark.server", "Work")) {
	const void *p;
	size_t sz;

	/* Make sure the mmap is mapped */
	assert_se(sd_bus_message_read_array(m, 'y', &p, &sz) > 0);

	assert_se(sd_bus_reply_method_return(m, NULL) >= 0);
	} else if (sd_bus_message_is_method_call(m, "benchmark.server", "Exit")) {
	uint64_t res;
	assert_se(sd_bus_message_read(m, "t", &res) > 0);

	*result = res;
	return;

	} else
	assert_not_reached("Unknown method");
	}
	}

	static void transaction(sd_bus *b, size_t sz) {
	_cleanup_bus_message_unref_ sd_bus_message m = NULL, reply = NULL;
	uint8_t *p;

	assert_se(sd_bus_message_new_method_call(b, &m, ":1.1", "/", "benchmark.server", "Work") >= 0);
	assert_se(sd_bus_message_append_array_space(m, 'y', sz, (void**) &p) >= 0);

	memset(p, 0x80, sz);

	assert_se(sd_bus_call(b, m, 0, NULL, &reply) >= 0);
	}

	static void client_bisect(const char *address) {
	_cleanup_bus_message_unref_ sd_bus_message *x = NULL;
	size_t lsize, rsize, csize;
	sd_bus *b;
	int r;

	r = sd_bus_new(&b);
	assert_se(r >= 0);

	r = sd_bus_set_address(b, address);
	assert_se(r >= 0);

	r = sd_bus_start(b);
	assert_se(r >= 0);

	assert_se(sd_bus_call_method(b, ":1.1", "/", "benchmark.server", "Ping", NULL, NULL, NULL) >= 0);

	lsize = 1;
	rsize = MAX_SIZE;

	printf("SIZE\tCOPY\tMEMFD\n");

	for (;;) {
	usec_t t;
	unsigned n_copying, n_memfd;

	csize = (lsize + rsize) / 2;

	if (csize <= lsize)
	break;

	if (csize <= 0)
	break;

	printf("%zu\t", csize);

	b->use_memfd = 0;

	t = now(CLOCK_MONOTONIC);
	for (n_copying = 0;; n_copying++) {
	transaction(b, csize);
	if (now(CLOCK_MONOTONIC) >= t + arg_loop_usec)
	break;
	}
	printf("%u\t", (unsigned) ((n_copying * USEC_PER_SEC) / arg_loop_usec));

	b->use_memfd = -1;

	t = now(CLOCK_MONOTONIC);
	for (n_memfd = 0;; n_memfd++) {
	transaction(b, csize);
	if (now(CLOCK_MONOTONIC) >= t + arg_loop_usec)
	break;
	}
	printf("%u\n", (unsigned) ((n_memfd * USEC_PER_SEC) / arg_loop_usec));

	if (n_copying == n_memfd)
	break;

	if (n_copying > n_memfd)
	lsize = csize;
	else
	rsize = csize;
	}

	b->use_memfd = 1;
	assert_se(sd_bus_message_new_method_call(b, &x, ":1.1", "/", "benchmark.server", "Exit") >= 0);
	assert_se(sd_bus_message_append(x, "t", csize) >= 0);
	assert_se(sd_bus_send(b, x, NULL) >= 0);

	sd_bus_unref(b);
	}

	static void client_chart(const char *address) {
	_cleanup_bus_message_unref_ sd_bus_message *x = NULL;
	size_t csize;
	sd_bus *b;
	int r;

	r = sd_bus_new(&b);
	assert_se(r >= 0);

	r = sd_bus_set_address(b, address);
	assert_se(r >= 0);

	r = sd_bus_start(b);
	assert_se(r >= 0);

	assert_se(sd_bus_call_method(b, ":1.1", "/", "benchmark.server", "Ping", NULL, NULL, NULL) >= 0);

	printf("SIZE\tCOPY\tMEMFD\n");

	for (csize = 1; csize <= MAX_SIZE; csize *= 2) {
	usec_t t;
	unsigned n_copying, n_memfd;

	printf("%zu\t", csize);

	b->use_memfd = 0;

	t = now(CLOCK_MONOTONIC);
	for (n_copying = 0;; n_copying++) {
	transaction(b, csize);
	if (now(CLOCK_MONOTONIC) >= t + arg_loop_usec)
	break;
	}

	printf("%u\t", (unsigned) ((n_copying * USEC_PER_SEC) / arg_loop_usec));

	b->use_memfd = -1;

	t = now(CLOCK_MONOTONIC);
	for (n_memfd = 0;; n_memfd++) {
	transaction(b, csize);
	if (now(CLOCK_MONOTONIC) >= t + arg_loop_usec)
	break;
	}

	printf("%u\n", (unsigned) ((n_memfd * USEC_PER_SEC) / arg_loop_usec));
	}

	b->use_memfd = 1;
	assert_se(sd_bus_message_new_method_call(b, &x, ":1.1", "/", "benchmark.server", "Exit") >= 0);
	assert_se(sd_bus_message_append(x, "t", csize) >= 0);
	assert_se(sd_bus_send(b, x, NULL) >= 0);

	sd_bus_unref(b);
	}

	int main(int argc, char *argv[]) {
	enum {
	MODE_BISECT,
	MODE_CHART,
	} mode = MODE_BISECT;
	int i;
	_cleanup_free_ char name = NULL, bus_name = NULL, *address = NULL;
	_cleanup_close_ int bus_ref = -1;
	cpu_set_t cpuset;
	size_t result;
	sd_bus *b;
	pid_t pid;
	int r;

	for (i = 1; i < argc; i++) {
	if (streq(argv[i], "chart")) {
	mode = MODE_CHART;
	continue;
	}

	assert_se(parse_sec(argv[i], &arg_loop_usec) >= 0);
	}

	assert_se(arg_loop_usec > 0);

	assert_se(asprintf(&name, "deine-mutter-%u", (unsigned) getpid()) >= 0);

	bus_ref = bus_kernel_create_bus(name, false, &bus_name);
	if (bus_ref == -ENOENT)
	exit(EXIT_TEST_SKIP);

	assert_se(bus_ref >= 0);

	address = strappend("kernel:path=", bus_name);
	assert_se(address);

	r = sd_bus_new(&b);
	assert_se(r >= 0);

	r = sd_bus_set_address(b, address);
	assert_se(r >= 0);

	r = sd_bus_start(b);
	assert_se(r >= 0);

	sync();
	setpriority(PRIO_PROCESS, 0, -19);

	pid = fork();
	assert_se(pid >= 0);

	if (pid == 0) {
	CPU_ZERO(&cpuset);
	CPU_SET(0, &cpuset);
	pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);

	safe_close(bus_ref);
	sd_bus_unref(b);

	switch (mode) {
	case MODE_BISECT:
	client_bisect(address);
	break;

	case MODE_CHART:
	client_chart(address);
	break;
	}

	_exit(0);
	}

	CPU_ZERO(&cpuset);
	CPU_SET(1, &cpuset);
	pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);

	server(b, &result);

	if (mode == MODE_BISECT)
	printf("Copying/memfd are equally fast at %zu bytes\n", result);

	assert_se(waitpid(pid, NULL, 0) == pid);

	sd_bus_unref(b);

	return 0;
	}