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radeonsi: reduce the frequency of switching GS fast launch on/off 

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12812>
This commit is contained in:
Marek Olšák 2021-08-18 11:14:26 -04:00 committed by Marge Bot
parent 468135abab
commit 8d7846cfed
1 changed files with 4 additions and 4 deletions
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8
src/gallium/drivers/radeonsi/si_state_draw.cpp
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@ -1854,11 +1854,11 @@ static void si_draw_vbo(struct pipe_context *ctx,
* A draw must have at least 1 full primitive.
* The fast launch doesn't work with tessellation.
*
* Small instances (including small draws) don't perform well with fast launch.
* It's better to use normal launch with NOT_EOP for small draws, and it's
* always better to use normal launch for small instances.
* Since NGG fast launch is enabled by VGT_SHADER_STAGES_EN, which causes a context roll,
* which decreases performance, decrease the frequency of switching it on/off using
* a high vertex count threshold.
*/
if (!HAS_TESS && ngg_culling && min_direct_count >= 64 &&
if (!HAS_TESS && ngg_culling && total_direct_count >= 8000 &&
!(sctx->screen->debug_flags & DBG(NO_FAST_LAUNCH))) {
if (prim == PIPE_PRIM_TRIANGLES && !index_size) {
ngg_culling |= SI_NGG_CULL_GS_FAST_LAUNCH_TRI_LIST;