linux-kernel - Re: [PATCH 2/2] perf tests: Add valid callback for parse-events test

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Date:   Wed, 13 Jun 2018 17:01:20 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     Thomas-Mich Richter <tmricht@...ux.ibm.com>,
        Kim Phillips <kim.phillips@....com>,
        lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        David Ahern <dsahern@...il.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        linux-perf-users@...r.kernel.org, brueckner@...ux.vnet.ibm.com,
        schwidefsky@...ibm.com, heiko.carstens@...ibm.com
Subject: Re: [PATCH 2/2] perf tests: Add valid callback for parse-events test

Em Mon, Jun 11, 2018 at 11:34:22AM +0200, Jiri Olsa escreveu:
> Adding optional 'valid' callback for events tests in
> parse-events object, so we don't try to parse PMUs,
> which are not supported.
> 
> Following line is displayed for skipped test:
> 
>   running test 52 'intel_pt//u'... SKIP

Would be nice to test the _parsing_ of this even on machines where this
PMU is not present, as developers using these machines as workstations
may end up breaking this.

Anyway, intel_pt now is in tons of machines, so should be caught easily,
if not by anyone, by me ;-\

- Arnaldo
 
> Link: http://lkml.kernel.org/n/tip-to9naisphr61z23b0br10xhh@git.kernel.org
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> ---
>  tools/perf/tests/parse-events.c | 17 +++++++++++++++--
>  1 file changed, 15 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/perf/tests/parse-events.c b/tools/perf/tests/parse-events.c
> index 3b0bfdf5a594..347378ddaa8b 100644
> --- a/tools/perf/tests/parse-events.c
> +++ b/tools/perf/tests/parse-events.c
> @@ -1309,6 +1309,11 @@ static int test__checkevent_config_cache(struct perf_evlist *evlist)
>  	return 0;
>  }
>  
> +static bool test__intel_pt_valid(void)
> +{
> +	return !!perf_pmu__find("intel_pt");
> +}
> +
>  static int test__intel_pt(struct perf_evlist *evlist)
>  {
>  	struct perf_evsel *evsel = perf_evlist__first(evlist);
> @@ -1375,6 +1380,7 @@ struct evlist_test {
>  	const char *name;
>  	__u32 type;
>  	const int id;
> +	bool (*valid)(void);
>  	int (*check)(struct perf_evlist *evlist);
>  };
>  
> @@ -1648,6 +1654,7 @@ static struct evlist_test test__events[] = {
>  	},
>  	{
>  		.name  = "intel_pt//u",
> +		.valid = test__intel_pt_valid,
>  		.check = test__intel_pt,
>  		.id    = 52,
>  	},
> @@ -1690,6 +1697,11 @@ static int test_event(struct evlist_test *e)
>  	struct perf_evlist *evlist;
>  	int ret;
>  
> +	if (e->valid && !e->valid()) {
> +		pr_debug("... SKIP");
> +		return 0;
> +	}
> +
>  	evlist = perf_evlist__new();
>  	if (evlist == NULL)
>  		return -ENOMEM;
> @@ -1716,10 +1728,11 @@ static int test_events(struct evlist_test *events, unsigned cnt)
>  	for (i = 0; i < cnt; i++) {
>  		struct evlist_test *e = &events[i];
>  
> -		pr_debug("running test %d '%s'\n", e->id, e->name);
> +		pr_debug("running test %d '%s'", e->id, e->name);
>  		ret1 = test_event(e);
>  		if (ret1)
>  			ret2 = ret1;
> +		pr_debug("\n");
>  	}
>  
>  	return ret2;
> @@ -1801,7 +1814,7 @@ static int test_pmu_events(void)
>  	}
>  
>  	while (!ret && (ent = readdir(dir))) {
> -		struct evlist_test e;
> +		struct evlist_test e = { 0 };
>  		char name[2 * NAME_MAX + 1 + 12 + 3];
>  
>  		/* Names containing . are special and cannot be used directly */
> -- 
> 2.13.6