[lttng-dev] [PATCH lttng-tools v3 3/3] Create a dedicated test suite for Perf

[Julien Desfossez]

> diff --git a/tests/perf/find_event.c b/tests/perf/find_event.c
> new file mode 100644
> index 0000000..ae63800
> --- /dev/null
> +++ b/tests/perf/find_event.c
> @@ -0,0 +1,83 @@
> +/*
> + * Copyright (c)  2016 Julien Desfossez <jdesfossez at 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;
> +
> +			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%lx\n", info.code);
This should be:
fprintf(stdout, "r%" PRIx64 "\n", info.code);

I will wait for other comments if any before resubmitting a new version
(or you can directly apply the fix when you merge).

Thanks,

Julien