[Mesa-dev] [PATCH 00/10] glsl: Implement varying packing.
eric at anholt.net
Wed Dec 12 09:51:23 PST 2012
Paul Berry <stereotype441 at gmail.com> writes:
> On 12 December 2012 00:02, Eric Anholt <eric at anholt.net> wrote:
>> Paul Berry <stereotype441 at gmail.com> writes:
>> > This patch series adds varying packing to Mesa, so that we can handle
>> > varyings composed of things other than vec4's without using up extra
>> > varying components.
>> Results for glbenchmark 2.7 at 320x240 (units of fps):
>> N Min Max Median Avg Stddev
>> x 109 86 87 86 86.027523 0.16435709
>> + 109 86 87 87 86.963303 0.18888589
>> Difference at 95.0% confidence
>> 0.93578 +/- 0.0470052
>> 1.08777% +/- 0.0546397%
>> (Student's t, pooled s = 0.177047)
>> I chose a tiny resolution here to try and focus on the path that we
>> think this will help in (clipping overhead reduction). The stupid app
>> prints an integer fps, so it can be hard to get any signal out of small
>> changes at higher resolutions.
> I'm not sure which line is with varying packing and which line is without.
> Is this an improvement or a performance degradation?
Oops, I usually paste the other two lines too. It's before and after,
so 1% improvement.
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