Lavapipe performance question during interactive drawing

George Karpathios gkarpa1 at
Fri May 5 14:31:37 UTC 2023

Hi Mike,

Thanks for responding. I commented the call
to lvp_find_inlinable_uniforms() in lvp_pipeline.c but unfortunately it
didn't help this time. It may have gotten a bit worse actually.

Best regards,

On Fri, May 5, 2023 at 3:08 PM Mike Blumenkrantz <
michael.blumenkrantz at> wrote:

> Hi,
> Can you try commenting out the same lines from last time and see whether
> that affects anything?
> Mike
> On Fri, May 5, 2023 at 7:30 AM George Karpathios <gkarpa1 at>
> wrote:
>> Hi list,
>> I'm using Lavapipe for Vulkan software rendering support in a modeling
>> application. I notice a large performance hit (with any Mesa version) in
>> the following scenario: The user clicks & drags the mouse in order to
>> create a simple shape (e.g. plane, cube, sphere) dynamically and the result
>> is being rendered (basic gray shading) in real-time alongside the movement
>> of the mouse. Lavapipe seems to be struggling a bit to keep up with this
>> action as the frame time goes up to over 1 second. On the other hand, on a
>> more "static" scene I can get great fps (30-60) while panning/rotating a
>> scene, after Mike Blumenkrantz's recent improvements (many thanks for those
>> again!).
>> I've uploaded a screenshot of the VS profiler showing the hot path at
>>  and I'd appreciate hearing your thoughts on
>> this. Thanks once more for your time.
>> Best regards,
>> George
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