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ac/surface: select best swizzle mode for 3D sampler performance

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Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9448>
This commit is contained in:
Marek Olšák 2021-03-07 06:48:55 -05:00 • committed by Marge Bot
parent 08ece5d6b3
commit b43f40166c
1 changed files with 17 additions and 0 deletions
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17
src/amd/common/ac_surface.c
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@ -1567,6 +1567,23 @@ static int gfx9_get_preferred_swizzle_mode(ADDR_HANDLE addrlib, struct radeon_su
sin.preferredSwSet.sw_R = 1;
}
if (in->resourceType == ADDR_RSRC_TEX_3D && in->numSlices > 1) {
/* 3D textures should use S swizzle modes for the best performance.
* THe only exception is 3D render targets, which prefer 64KB_D_X.
*
* 3D texture sampler performance with a very large 3D texture:
* ADDR_SW_64KB_R_X = 19 FPS (DCC on), 26 FPS (DCC off)
* ADDR_SW_64KB_Z_X = 25 FPS
* ADDR_SW_64KB_D_X = 53 FPS
* ADDR_SW_4KB_S = 53 FPS
* ADDR_SW_64KB_S = 53 FPS
* ADDR_SW_64KB_S_T = 61 FPS
* ADDR_SW_4KB_S_X = 63 FPS
* ADDR_SW_64KB_S_X = 62 FPS
*/
sin.preferredSwSet.sw_S = 1;
}
ret = Addr2GetPreferredSurfaceSetting(addrlib, &sin, &sout);
if (ret != ADDR_OK)
return ret;