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From: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
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Date: Fri, 27 Mar 2020 18:09:41 +0200
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Subject: Re: [igt-dev] [PATCH i-g-t] tests/perf: add a test for OA data
 polling reads using "small" buffers
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To: "Dixit, Ashutosh" <ashutosh.dixit@intel.com>, igt-dev@lists.freedesktop.org
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On 27/03/2020 06:50, Dixit, Ashutosh wrote:
> On Thu, 26 Mar 2020 21:42:50 -0700, Ashutosh Dixit wrote:
>> diff --git a/tests/perf.c b/tests/perf.c
>> index 724f6f809..3dc757c3b 100644
>> --- a/tests/perf.c
>> +++ b/tests/perf.c
>> +static void test_polling_small_buf(void)
>> +{
> /snip/
>
>> +
>> +	igt_assert(abs(n_expect_read_bytes - n_bytes_read) < (0.10 * n_expect_read_bytes));
>> +}
>> +
> I'd be wary of a 90% match on slow platforms like Atom? Maybe 80% is safer?


Do we have any experiment showing them behaving differently?


-Lionel

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