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radeonsi: add a performance tweak for 4 SE parts

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Ported from Vulkan.

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
This commit is contained in:
Marek Olšák 2016-06-03 16:20:17 +02:00
parent 2802310c25
commit 991cbfcb14
1 changed files with 11 additions and 0 deletions
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11
src/gallium/drivers/radeonsi/si_state_draw.c
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@ -308,6 +308,17 @@ static unsigned si_get_ia_multi_vgt_param(struct si_context *sctx,
(info->indirect || info->instance_count > 1))
wd_switch_on_eop = true;
/* Performance recommendation for 4 SE Gfx7-8 parts if
* instances are smaller than a primgroup. Ignore the fact
* primgroup_size is a primitive count, not vertex count.
* Don't do anything for indirect draws.
*/
if (sctx->b.chip_class <= VI &&
sctx->b.screen->info.max_se >= 4 &&
!info->indirect &&
info->instance_count > 1 && info->count < primgroup_size)
wd_switch_on_eop = true;
/* Required on CIK and later. */
if (sctx->b.screen->info.max_se > 2 && !wd_switch_on_eop)
ia_switch_on_eoi = true;