304 lines
8.8 KiB
C
304 lines
8.8 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2013 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <ctype.h>
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#include <sys/wait.h>
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#include "util.h"
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#include "log.h"
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#include "time-util.h"
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#include "sd-bus.h"
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#include "bus-message.h"
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#include "bus-error.h"
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#include "bus-kernel.h"
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#include "bus-internal.h"
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#include "bus-util.h"
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#define MAX_SIZE (4*1024*1024)
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static usec_t arg_loop_usec = 100 * USEC_PER_MSEC;
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static void server(sd_bus *b, size_t *result) {
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int r;
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for (;;) {
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_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
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r = sd_bus_process(b, &m);
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assert_se(r >= 0);
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if (r == 0)
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assert_se(sd_bus_wait(b, (usec_t) -1) >= 0);
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if (!m)
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continue;
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if (sd_bus_message_is_method_call(m, "benchmark.server", "Ping"))
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assert_se(sd_bus_reply_method_return(m, NULL) >= 0);
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else if (sd_bus_message_is_method_call(m, "benchmark.server", "Work")) {
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const void *p;
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size_t sz;
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/* Make sure the mmap is mapped */
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assert_se(sd_bus_message_read_array(m, 'y', &p, &sz) > 0);
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assert_se(sd_bus_reply_method_return(m, NULL) >= 0);
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} else if (sd_bus_message_is_method_call(m, "benchmark.server", "Exit")) {
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uint64_t res;
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assert_se(sd_bus_message_read(m, "t", &res) > 0);
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*result = res;
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return;
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} else
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assert_not_reached("Unknown method");
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}
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}
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static void transaction(sd_bus *b, size_t sz) {
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_cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
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uint8_t *p;
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assert_se(sd_bus_message_new_method_call(b, ":1.1", "/", "benchmark.server", "Work", &m) >= 0);
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assert_se(sd_bus_message_append_array_space(m, 'y', sz, (void**) &p) >= 0);
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memset(p, 0x80, sz);
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assert_se(sd_bus_call(b, m, 0, NULL, &reply) >= 0);
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}
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static void client_bisect(const char *address) {
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_cleanup_bus_message_unref_ sd_bus_message *x = NULL;
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size_t lsize, rsize, csize;
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sd_bus *b;
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int r;
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r = sd_bus_new(&b);
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assert_se(r >= 0);
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r = sd_bus_set_address(b, address);
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assert_se(r >= 0);
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r = sd_bus_start(b);
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assert_se(r >= 0);
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assert_se(sd_bus_call_method(b, ":1.1", "/", "benchmark.server", "Ping", NULL, NULL, NULL) >= 0);
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lsize = 1;
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rsize = MAX_SIZE;
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printf("SIZE\tCOPY\tMEMFD\n");
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for (;;) {
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usec_t t;
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unsigned n_copying, n_memfd;
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csize = (lsize + rsize) / 2;
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if (csize <= lsize)
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break;
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if (csize <= 0)
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break;
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printf("%zu\t", csize);
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b->use_memfd = 0;
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t = now(CLOCK_MONOTONIC);
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for (n_copying = 0;; n_copying++) {
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transaction(b, csize);
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if (now(CLOCK_MONOTONIC) >= t + arg_loop_usec)
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break;
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}
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printf("%u\t", (unsigned) ((n_copying * USEC_PER_SEC) / arg_loop_usec));
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b->use_memfd = -1;
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t = now(CLOCK_MONOTONIC);
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for (n_memfd = 0;; n_memfd++) {
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transaction(b, csize);
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if (now(CLOCK_MONOTONIC) >= t + arg_loop_usec)
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break;
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}
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printf("%u\n", (unsigned) ((n_memfd * USEC_PER_SEC) / arg_loop_usec));
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if (n_copying == n_memfd)
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break;
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if (n_copying > n_memfd)
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lsize = csize;
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else
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rsize = csize;
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}
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b->use_memfd = 1;
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assert_se(sd_bus_message_new_method_call(b, ":1.1", "/", "benchmark.server", "Exit", &x) >= 0);
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assert_se(sd_bus_message_append(x, "t", csize) >= 0);
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assert_se(sd_bus_send(b, x, NULL) >= 0);
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sd_bus_unref(b);
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}
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static void client_chart(const char *address) {
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_cleanup_bus_message_unref_ sd_bus_message *x = NULL;
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size_t csize;
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sd_bus *b;
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int r;
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r = sd_bus_new(&b);
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assert_se(r >= 0);
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r = sd_bus_set_address(b, address);
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assert_se(r >= 0);
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r = sd_bus_start(b);
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assert_se(r >= 0);
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assert_se(sd_bus_call_method(b, ":1.1", "/", "benchmark.server", "Ping", NULL, NULL, NULL) >= 0);
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printf("SIZE\tCOPY\tMEMFD\n");
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for (csize = 1; csize <= MAX_SIZE; csize *= 2) {
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usec_t t;
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unsigned n_copying, n_memfd;
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printf("%zu\t", csize);
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b->use_memfd = 0;
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t = now(CLOCK_MONOTONIC);
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for (n_copying = 0;; n_copying++) {
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transaction(b, csize);
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if (now(CLOCK_MONOTONIC) >= t + arg_loop_usec)
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break;
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}
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printf("%u\t", (unsigned) ((n_copying * USEC_PER_SEC) / arg_loop_usec));
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b->use_memfd = -1;
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t = now(CLOCK_MONOTONIC);
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for (n_memfd = 0;; n_memfd++) {
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transaction(b, csize);
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if (now(CLOCK_MONOTONIC) >= t + arg_loop_usec)
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break;
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}
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printf("%u\n", (unsigned) ((n_memfd * USEC_PER_SEC) / arg_loop_usec));
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}
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b->use_memfd = 1;
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assert_se(sd_bus_message_new_method_call(b, ":1.1", "/", "benchmark.server", "Exit", &x) >= 0);
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assert_se(sd_bus_message_append(x, "t", csize) >= 0);
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assert_se(sd_bus_send(b, x, NULL) >= 0);
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sd_bus_unref(b);
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}
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int main(int argc, char *argv[]) {
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enum {
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MODE_BISECT,
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MODE_CHART,
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} mode = MODE_BISECT;
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int i;
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_cleanup_free_ char *name = NULL, *bus_name = NULL, *address = NULL;
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_cleanup_close_ int bus_ref = -1;
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cpu_set_t cpuset;
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size_t result;
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sd_bus *b;
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pid_t pid;
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int r;
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for (i = 1; i < argc; i++) {
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if (streq(argv[i], "chart")) {
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mode = MODE_CHART;
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continue;
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}
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assert_se(parse_sec(argv[i], &arg_loop_usec) >= 0);
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}
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assert_se(arg_loop_usec > 0);
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assert_se(asprintf(&name, "deine-mutter-%u", (unsigned) getpid()) >= 0);
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bus_ref = bus_kernel_create_bus(name, false, &bus_name);
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if (bus_ref == -ENOENT)
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exit(EXIT_TEST_SKIP);
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assert_se(bus_ref >= 0);
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address = strappend("kernel:path=", bus_name);
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assert_se(address);
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r = sd_bus_new(&b);
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assert_se(r >= 0);
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r = sd_bus_set_address(b, address);
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assert_se(r >= 0);
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r = sd_bus_start(b);
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assert_se(r >= 0);
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sync();
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setpriority(PRIO_PROCESS, 0, -19);
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pid = fork();
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assert_se(pid >= 0);
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if (pid == 0) {
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CPU_ZERO(&cpuset);
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CPU_SET(0, &cpuset);
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pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);
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close_nointr_nofail(bus_ref);
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sd_bus_unref(b);
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switch (mode) {
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case MODE_BISECT:
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client_bisect(address);
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break;
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case MODE_CHART:
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client_chart(address);
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break;
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}
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_exit(0);
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}
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CPU_ZERO(&cpuset);
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CPU_SET(1, &cpuset);
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pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);
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server(b, &result);
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if (mode == MODE_BISECT)
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printf("Copying/memfd are equally fast at %zu bytes\n", result);
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assert_se(waitpid(pid, NULL, 0) == pid);
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sd_bus_unref(b);
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return 0;
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}
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