Lavapipe performance

[Jose Fonseca]

Thanks for refreshing my memory, Erik. Indeed OpenSWR was it.

George, the geometry is quite smooth and it doesn't look complex enough to
justify 130k triangles.  If the application has some sort of tunable NURBS
tesselator, I'd tune it down so it spits out fewer triangles.  That would
increase llvmpipe performance without much visual degradation.

Jose


On Thu, Jan 30, 2025 at 3:14 PM George Karpathios <gkarpa1 at gmail.com> wrote:

> Thank you all, for the tips. Using a smaller window doesn't change
> anything, neither does tweaking LP_NUM_THREADS (between 8/12/16). I am also
> not using MSAA. I'll have to dig some more regarding your other
> suggestions. I've shared a screenshot of what is being rendered at
> https://imgur.com/a/6P6OAWA , although based on your observations I'm
> probably leaning towards being geometry bound.
>
> On Thu, Jan 30, 2025 at 4:45 PM Erik Faye-Lund <
> erik.faye-lund at collabora.com> wrote:
>
>> On Thu, 2025-01-30 at 13:49 +0000, Jose Fonseca wrote:
>> > At one point there was another SW renderer gallium driver by a team
>> > at Intel that was specifically optimized for huge number of
>> > primitives with no texturing (like the sort used by https://vtk.org/
>> > ), but I can't remember its name or find it.
>>
>> Not super important, but for future reference: You're talking about
>> OpenSWR, see these links for more info:
>>
>>
>> https://gitlab.freedesktop.org/mesa/mesa/-/blob/amber/docs/drivers/openswr.rst
>> https://www.openswr.org/
>>
>> It didn't really benchmark much better than Llvmpipe, though:
>> https://www.phoronix.com/review/llvmpipe-swr-xeon
>>
>> In the end, I think it didn't add enough value to anyone willing to
>> work on maintaining it.
>>
>>

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