Create a dedicated test suite for Perf

[lttng-tools.git] / tests / perf / find_event.c

diff --git a/tests/perf/find_event.c b/tests/perf/find_event.c
new file mode 100644 (file)
index 0000000..5aacd59
--- /dev/null
+++ b/tests/perf/find_event.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c)  2016 Julien Desfossez <jdesfossez@efficios.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * as published by the Free Software Foundation; only version 2
+ * of the License.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <stdio.h>
+#include <perfmon/pfmlib.h>
+#include <string.h>
+
+int main(int argc, char **argv)
+{
+       int ret, i;
+       unsigned int j;
+       pfm_pmu_info_t pinfo;
+
+       if (argc != 2) {
+               fprintf(stderr, "Usage: %s <pmu counter to find>\n"
+                               "ex: %s UNHALTED_REFERENCE_CYCLES\n"
+                               "Returns the first occurence it finds with "
+                               "return code 0.\n"
+                               "If not found returns 1, on error returns -1\n",
+                               argv[0], argv[0]);
+               ret = -1;
+               goto end;
+       }
+
+       memset(&pinfo, 0, sizeof(pinfo));
+       pinfo.size = sizeof(pinfo);
+
+       ret = pfm_initialize();
+       if (ret != PFM_SUCCESS) {
+               fprintf(stderr, "Failed to initialise libpfm: %s",
+                               pfm_strerror(ret));
+               ret = -1;
+               goto end;
+       }
+
+       pfm_for_all_pmus(j) {
+               ret = pfm_get_pmu_info(j, &pinfo);
+               if (ret != PFM_SUCCESS) {
+                       continue;
+               }
+
+               for (i = pinfo.first_event; i != -1; i = pfm_get_event_next(i)) {
+                       pfm_event_info_t info =
+                                       { .size = sizeof(pfm_event_info_t) };
+
+                       ret = pfm_get_event_info(i, PFM_OS_NONE, &info);
+                       if (ret != PFM_SUCCESS) {
+                               fprintf(stderr, "Cannot get event info: %s\n",
+                                               pfm_strerror(ret));
+                               ret = -1;
+                               goto end;
+                       }
+
+                       if (info.pmu != j) {
+                               continue;
+                       }
+
+                       if (strcmp(info.name, argv[1]) == 0) {
+                               fprintf(stdout, "r%" PRIx64 "\n", info.code);
+                               ret = 0;
+                               goto end;
+                       }
+               }
+       }
+
+       ret = 1;
+
+end:
+       return ret;
+}