/*-*- 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, ":1.1", "/", "benchmark.server", "Work", &m) >= 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, ":1.1", "/", "benchmark.server", "Exit", &x) >= 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, ":1.1", "/", "benchmark.server", "Exit", &x) >= 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 *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); bus_ref = bus_kernel_create_bus("deine-mutter", &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); close_nointr_nofail(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; }