+++ /dev/null
-/*-*- 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 <sys/wait.h>
-
-#include "util.h"
-#include "time-util.h"
-
-#include "sd-bus.h"
-#include "bus-kernel.h"
-#include "bus-internal.h"
-#include "bus-util.h"
-
-#define MAX_SIZE (2*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_INFINITY) >= 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);
-
- r = sd_bus_reply_method_return(m, NULL);
- assert_se(r >= 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, const char *server_name) {
- _cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
- uint8_t *p;
-
- assert_se(sd_bus_message_new_method_call(b, &m, server_name, "/", "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, const char *server_name) {
- _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);
-
- r = sd_bus_call_method(b, server_name, "/", "benchmark.server", "Ping", NULL, NULL, NULL);
- assert_se(r >= 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, server_name);
- 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, server_name);
- 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, server_name, "/", "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, const char *server_name) {
- _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, server_name, "/", "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, server_name);
- 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, server_name);
- 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, server_name, "/", "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, *server_name = NULL;
- _cleanup_close_ int bus_ref = -1;
- const char *unique;
- 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);
-
- r = sd_bus_get_unique_name(b, &unique);
- assert_se(r >= 0);
-
- server_name = strdup(unique);
- assert_se(server_name);
-
- 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, server_name);
- break;
-
- case MODE_CHART:
- client_chart(address, server_name);
- 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;
-}
~ianmdlvl / elogind.git / blobdiff