Create a dedicated test suite for Perf
[lttng-tools.git] / tests / perf / find_event.c
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6faa26ca
JD
1/*
2 * Copyright (c) 2016 Julien Desfossez <jdesfossez@efficios.com>
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#include <stdio.h>
20#include <perfmon/pfmlib.h>
21#include <string.h>
22
23int main(int argc, char **argv)
24{
25 int ret, i;
26 unsigned int j;
27 pfm_pmu_info_t pinfo;
28
29 if (argc != 2) {
30 fprintf(stderr, "Usage: %s <pmu counter to find>\n"
31 "ex: %s UNHALTED_REFERENCE_CYCLES\n"
32 "Returns the first occurence it finds with "
33 "return code 0.\n"
34 "If not found returns 1, on error returns -1\n",
35 argv[0], argv[0]);
36 ret = -1;
37 goto end;
38 }
39
40 memset(&pinfo, 0, sizeof(pinfo));
41 pinfo.size = sizeof(pinfo);
42
43 ret = pfm_initialize();
44 if (ret != PFM_SUCCESS) {
45 fprintf(stderr, "Failed to initialise libpfm: %s",
46 pfm_strerror(ret));
47 ret = -1;
48 goto end;
49 }
50
51 pfm_for_all_pmus(j) {
52 ret = pfm_get_pmu_info(j, &pinfo);
53 if (ret != PFM_SUCCESS) {
54 continue;
55 }
56
57 for (i = pinfo.first_event; i != -1; i = pfm_get_event_next(i)) {
58 pfm_event_info_t info =
59 { .size = sizeof(pfm_event_info_t) };
60
61 ret = pfm_get_event_info(i, PFM_OS_NONE, &info);
62 if (ret != PFM_SUCCESS) {
63 fprintf(stderr, "Cannot get event info: %s\n",
64 pfm_strerror(ret));
65 ret = -1;
66 goto end;
67 }
68
69 if (info.pmu != j) {
70 continue;
71 }
72
73 if (strcmp(info.name, argv[1]) == 0) {
74 fprintf(stdout, "r%" PRIx64 "\n", info.code);
75 ret = 0;
76 goto end;
77 }
78 }
79 }
80
81 ret = 1;
82
83end:
84 return ret;
85}
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