| 1 | /* |
| 2 | * Copyright (c) 2011 David Goulet <david.goulet@polymtl.ca> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * as published by the Free Software Foundation; only version 2 |
| 7 | * of the License. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License along |
| 15 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 17 | */ |
| 18 | |
| 19 | #define _GNU_SOURCE |
| 20 | #include <assert.h> |
| 21 | #include <errno.h> |
| 22 | #include <stdio.h> |
| 23 | #include <stdlib.h> |
| 24 | #include <string.h> |
| 25 | #include <unistd.h> |
| 26 | #include <time.h> |
| 27 | |
| 28 | #include "lttng-sessiond/session.h" |
| 29 | #include "utils.h" |
| 30 | #include "benchmark.h" |
| 31 | |
| 32 | #define SESSION1 "test1" |
| 33 | |
| 34 | /* This path will NEVER be created in this test */ |
| 35 | #define PATH1 "/tmp/.test-junk-lttng" |
| 36 | |
| 37 | /* For lttngerr.h */ |
| 38 | int opt_quiet = 1; |
| 39 | int opt_verbose = 0; |
| 40 | |
| 41 | static const char alphanum[] = |
| 42 | "0123456789" |
| 43 | "ABCDEFGHIJKLMNOPQRSTUVWXYZ" |
| 44 | "abcdefghijklmnopqrstuvwxyz"; |
| 45 | |
| 46 | /* |
| 47 | * Return random string of 10 characters. |
| 48 | */ |
| 49 | static char *get_random_string(void) |
| 50 | { |
| 51 | int i; |
| 52 | char *str = malloc(11); |
| 53 | |
| 54 | for (i = 0; i < 10; i++) { |
| 55 | str[i] = alphanum[rand() % (sizeof(alphanum) - 1)]; |
| 56 | } |
| 57 | |
| 58 | str[10] = '\0'; |
| 59 | |
| 60 | return str; |
| 61 | } |
| 62 | |
| 63 | int main(int argc, char **argv) |
| 64 | { |
| 65 | int ret, i, nb_iter; |
| 66 | char **names; |
| 67 | double value, total = 0; |
| 68 | struct ltt_session *session; |
| 69 | |
| 70 | if (getuid() != 0) { |
| 71 | printf("Aborting test. Must be uid 0 to drop_caches\n"); |
| 72 | return 1; |
| 73 | } |
| 74 | |
| 75 | if (argc < 2) { |
| 76 | printf("Missing arguments\n"); |
| 77 | return 1; |
| 78 | } |
| 79 | |
| 80 | nb_iter = atoi(argv[1]); |
| 81 | |
| 82 | names = malloc(sizeof(char*) * nb_iter); |
| 83 | |
| 84 | srand(time(NULL)); |
| 85 | bench_init(); |
| 86 | |
| 87 | fprintf(fp, "--- Create tracing session ---\n"); |
| 88 | for (i = 0; i < nb_iter; i++) { |
| 89 | names[i] = get_random_string(); |
| 90 | ret = system("echo 3 >/proc/sys/vm/drop_caches"); |
| 91 | tracepoint(create_session_start); |
| 92 | ret = session_create(names[i], PATH1); |
| 93 | tracepoint(create_session_end); |
| 94 | if (ret < 0) { |
| 95 | printf("Create session went wrong. Aborting\n"); |
| 96 | goto error; |
| 97 | } |
| 98 | value = bench_get_create_session(); |
| 99 | fprintf(fp, "%.20f\n", value); |
| 100 | total += value; |
| 101 | } |
| 102 | |
| 103 | fprintf(fp, "--> Average: %.20f\n\n", total/nb_iter); |
| 104 | total = 0; |
| 105 | |
| 106 | fprintf(fp, "--- Destroy tracing session ---\n"); |
| 107 | for (i = 0; i < nb_iter; i++) { |
| 108 | session = session_find_by_name(names[i]); |
| 109 | ret = system("echo 3 >/proc/sys/vm/drop_caches"); |
| 110 | tracepoint(destroy_session_start); |
| 111 | ret = session_destroy(session); |
| 112 | tracepoint(destroy_session_end); |
| 113 | if (ret < 0) { |
| 114 | printf("Destroy session went wrong. Aborting\n"); |
| 115 | goto error; |
| 116 | } |
| 117 | value = bench_get_destroy_session(); |
| 118 | fprintf(fp, "%.20f\n", value); |
| 119 | total += value; |
| 120 | free(names[i]); |
| 121 | } |
| 122 | fprintf(fp, "--> Average: %.20f\n\n", total/nb_iter); |
| 123 | |
| 124 | /* Success */ |
| 125 | bench_close(); |
| 126 | return 0; |
| 127 | |
| 128 | error: |
| 129 | bench_close(); |
| 130 | free(names); |
| 131 | |
| 132 | return 1; |
| 133 | } |