linux-kernel - Re: [PATCH v2 11/11] perf test: add expr test for pmu metrics

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Date:   Thu, 23 Apr 2020 13:28:47 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Ian Rogers <irogers@...gle.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Haiyan Song <haiyanx.song@...el.com>,
        Jin Yao <yao.jin@...ux.intel.com>,
        Song Liu <songliubraving@...com>,
        Ravi Bangoria <ravi.bangoria@...ux.ibm.com>,
        John Garry <john.garry@...wei.com>,
        Leo Yan <leo.yan@...aro.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Paul Clarke <pc@...ibm.com>, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org,
        Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH v2 11/11] perf test: add expr test for pmu metrics

On Wed, Apr 22, 2020 at 03:04:30PM -0700, Ian Rogers wrote:

SNIP

> +
> +static int pmu_tests(void)
> +{
> +	struct pmu_events_map *map;
> +	struct pmu_event *pe;
> +	int i, j, k;
> +	const char **ids;
> +	int idnum;
> +	int ret = 0;
> +	struct expr_parse_ctx ctx;
> +	double result;
> +
> +	i = 0;
> +	for (;;) {
> +		map = &pmu_events_map[i++];
> +		if (!map->table) {
> +			map = NULL;
> +			break;
> +		}
> +		j = 0;
> +		for (;;) {
> +			pe = &map->table[j++];
> +			if (!pe->name && !pe->metric_group && !pe->metric_name)
> +				break;
> +			if (!pe->metric_expr)
> +				continue;

so we go throught all the metrics for the current cpu
and test the parsing on them.. great!

thanks,
jirka