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radeonsi: allow using 64K LDS for NGG to allow larger workgroups

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This should help with NGG streamout performance, which is limited by
the workgroup size (it should be as large as possible).

Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21403>
This commit is contained in:
Marek Olšák 2023-02-25 17:41:39 -05:00 • committed by Marge Bot
parent e01d505291
commit 43fd552872
1 changed files with 2 additions and 4 deletions
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6
src/gallium/drivers/radeonsi/gfx10_shader_ngg.c
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@ -106,10 +106,8 @@ bool gfx10_ngg_calculate_subgroup_info(struct si_shader *shader)
const unsigned max_verts_per_prim = u_vertices_per_prim(input_prim);
const unsigned min_verts_per_prim = gs_stage == MESA_SHADER_GEOMETRY ? max_verts_per_prim : 1;
/* All these are in dwords: */
/* GE can only use 8K dwords (32KB) of LDS per workgroup.
*/
const unsigned max_lds_size = 8 * 1024 - gfx10_ngg_get_scratch_dw_size(shader);
/* All these are in dwords. The maximum is 16K dwords (64KB) of LDS per workgroup. */
const unsigned max_lds_size = 16 * 1024 - gfx10_ngg_get_scratch_dw_size(shader);
const unsigned target_lds_size = max_lds_size;
unsigned esvert_lds_size = 0;
unsigned gsprim_lds_size = 0;