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radv/gfx10: adjust the LDS size used to compute waves

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It's 128KB per CU in WGP.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3899>
This commit is contained in:
Samuel Pitoiset 2020-02-20 08:50:29 +01:00 • committed by Marge Bot
parent ea91b15a31
commit 568f150409
1 changed files with 2 additions and 4 deletions
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6
src/amd/vulkan/radv_shader.c
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@ -1336,11 +1336,9 @@ radv_get_max_waves(struct radv_device *device,
RADV_NUM_PHYSICAL_VGPRS / vgprs);
}
/* LDS is 64KB per CU (4 SIMDs), divided into 16KB blocks per SIMD
* that PS can use.
*/
unsigned max_lds_per_simd = device->physical_device->rad_info.lds_size_per_cu / device->physical_device->rad_info.num_simd_per_compute_unit;
if (lds_per_wave)
max_simd_waves = MIN2(max_simd_waves, 16384 / lds_per_wave);
max_simd_waves = MIN2(max_simd_waves, max_lds_per_simd / lds_per_wave);
return max_simd_waves;
}