[Piglit] [PATCH] drawoverhead: new microbenchmark

Brian Paul brianp at vmware.com
Mon May 22 13:00:04 UTC 2017

On 05/15/2017 08:05 AM, Marek Olšák wrote:
> On Thu, May 11, 2017 at 9:49 PM, Eric Anholt <eric at anholt.net> wrote:
>> Marek Olšák <maraeo at gmail.com> writes:
>>> From: Marek Olšák <marek.olsak at amd.com>
>>> Based on a benchmark from mesa/demos, but rewritten and extended.
>>> It's a benchmark expected to be run separately, not a piglit test.
>>> So why piglit? Because it's a good framework for writing apps like this.
>>> mesa_glthread won't show an improvement here, because there is no app
>>> overhead.
>>> This is what the output looks like. The percentage is relative to
>>> the first test of the given draw call.
>>> The obvious thing there is that enabled vertex attribs decrease
>>> Mesa performance even if there are no state changes.
>> Since nobody else has replied,
>> I think piglit is the wrong place for this.  I agree that it's sorta
>> convenient, but mesa-demos or glmark2 are the right place.
> It can be moved to mesa/demos or glmark2 if/when they get support for
> piglit's dispatch and multiple window systems including gbm/drm, so
> that the code size of the test remains the same.

IMHO, I think it's fine to add performance tests to Piglit (I proposed a 
few years ago).  As Marek said, the infrastructure is there and it would 
be wasted effort to duplicate it elsewhere.


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