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3c6bae61 DG |
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 "ltt-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; | |
8f11f9f6 | 68 | struct ltt_session *session; |
3c6bae61 DG |
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); | |
8915fb60 | 92 | ret = session_create(names[i], PATH1); |
3c6bae61 DG |
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++) { | |
8f11f9f6 | 108 | session = session_find_by_name(names[i]); |
3c6bae61 DG |
109 | ret = system("echo 3 >/proc/sys/vm/drop_caches"); |
110 | tracepoint(destroy_session_start); | |
8f11f9f6 | 111 | ret = session_destroy(session); |
3c6bae61 DG |
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 | } |