linux-kernel - Re: [PATCH 2/2] perf tests: Add a test case for checking sw clock event frequency

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Date:	Tue, 19 Mar 2013 14:10:35 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Namhyung Kim <namhyung.kim@....com>
Subject: Re: [PATCH 2/2] perf tests: Add a test case for checking sw clock event frequency

Hi Arnaldo,

On Mon, 18 Mar 2013 11:42:43 -0300, Arnaldo Carvalho de Melo wrote:
> Em Mon, Mar 18, 2013 at 11:41:47AM +0900, Namhyung Kim escreveu:
>> +static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
>> +{
>> +	int i, err = -1;
>> +	volatile int tmp = 0;
>> +	u64 total_periods = 0;
>> +	int nr_samples = 0;
>> +	union perf_event *event;
>> +	struct perf_evsel *evsel;
>> +	struct perf_evlist *evlist;
>> +	struct perf_event_attr attr = {
>> +		.type = PERF_TYPE_SOFTWARE,
>> +		.config = clock_id,
>> +		.sample_type = PERF_SAMPLE_PERIOD,
>> +		.exclude_kernel = 1,
>> +		.disabled = 1,
>> +		.freq = 1,
>> +		.sample_freq = 10000,
>> +	};
>
> In some compilers we get:
>
> tests/sw-clock.c: In function ‘__test__sw_clock_freq’:
> tests/sw-clock.c:35: error: unknown field ‘sample_freq’ specified in initializer
>
> So I'm moving the initialization to outside the struct named initialization block, i.e.:
>
> @@ -32,9 +32,10 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
>                 .exclude_kernel = 1,
>                 .disabled = 1,
>                 .freq = 1,
> -               .sample_freq = 10000,
>         };
>  
> +       attr.sample_freq = 10000;
> +
>

Thanks for fixing this!
Namhyung
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