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radeonsi: disable SDMA on gfx6-7 and gfx10.3 to decrease CPU overhead 

same as gfx8-10

Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7055>
This commit is contained in:
Marek Olšák 2020-10-06 06:51:36 -04:00 committed by Marge Bot
parent 7a0162905b
commit 205f1d79e2
1 changed files with 15 additions and 18 deletions
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33
src/gallium/drivers/radeonsi/si_pipe.c
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@ -498,25 +498,22 @@ static struct pipe_context *si_create_context(struct pipe_screen *screen, unsign
if (!sctx->ctx)
goto fail;
/* SDMA causes corruption on: :
* - RX 580: https://gitlab.freedesktop.org/mesa/mesa/-/issues/1399, 1889
* - gfx9 APUs: https://gitlab.freedesktop.org/mesa/mesa/-/issues/2814
* - gfx10: https://gitlab.freedesktop.org/mesa/mesa/-/issues/1907,
https://gitlab.freedesktop.org/drm/amd/issues/892
*
* While we could keep buffer copies and clears enabled, let's disable
* everything because SDMA decreases CPU performance because of its
* command submission overhead.
*
* And SDMA is disabled on all chips (instead of just the ones listed above),
* because it doesn't make sense to keep it enabled on old chips only
* that are not tested as often as newer chips.
*/
if (sscreen->info.num_rings[RING_DMA] && !(sscreen->debug_flags & DBG(NO_SDMA)) &&
/* SDMA causes corruption on RX 580:
* https://gitlab.freedesktop.org/mesa/mesa/-/issues/1399
* https://gitlab.freedesktop.org/mesa/mesa/-/issues/1889
*/
(sctx->chip_class != GFX8 || sscreen->debug_flags & DBG(FORCE_SDMA)) &&
/* SDMA causes corruption on gfx9 APUs:
* https://gitlab.freedesktop.org/mesa/mesa/-/issues/2814
*
* While we could keep buffer copies and clears enabled, let's disable
* everything, because neither gfx8 nor gfx10 enable SDMA, and it's not
* easy to test.
*/
(sctx->chip_class != GFX9 || sscreen->debug_flags & DBG(FORCE_SDMA)) &&
/* SDMA timeouts sometimes on gfx10 so disable it for now. See:
* https://bugs.freedesktop.org/show_bug.cgi?id=111481
* https://gitlab.freedesktop.org/mesa/mesa/-/issues/1907
*/
(sctx->chip_class != GFX10 || sscreen->debug_flags & DBG(FORCE_SDMA))) {
sscreen->debug_flags & DBG(FORCE_SDMA)) {
sctx->sdma_cs = sctx->ws->cs_create(sctx->ctx, RING_DMA, (void *)si_flush_dma_cs, sctx,
stop_exec_on_failure);
}