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authorKenneth Graunke <[email protected]>2016-06-22 11:25:26 -0700
committerKenneth Graunke <[email protected]>2016-06-23 11:58:50 -0700
commitb0629e6894513a2c49a018bc3342a4e55435a236 (patch)
treecb3057c0f185f8ec6e40b89b903566d51ffa3ddb /src/mesa/main/vdpau.c
parent4db98f8beb990676be0833dda6c37566d0283911 (diff)
i965: Implement rasterizer discard via SOL unless required for queries.
We currently use CL_INVOCATION_COUNT for the GL_PRIMITIVES_GENERATED query, which involves passing all primitives to the clipper. When rasterizer discard is enabled, we program the clipper in REJECT_ALL mode, rather than using the SOL stage's "Rendering Disable" feature. See commit f09b91f78247409f54c975f56cb10d5f350fe64e for an explanation of why we implement GL_PRIMITIVES_GENERATED this way. Apparently the SOL stage's "Rendering Disable" feature is a lot faster than having the clipper reject all primitives. It's safe to use when no GL_PRIMITIVES_GENERATED query is active, as we don't care about CL_INVOCATION_COUNT incrementing. This patch makes us use SO_RENDERING_DISABLE when no query is active, but continues falling back to the clipper in REJECT_ALL mode when the queries are enabled. It brings back the perf_debug for the clipper case (which I removed in commit 1f9445ff57b, thinking it wasn't useful). Improves performance in Gl32GSCloth by 84.8303% +/- 2.07132% (n = 10) on my Broadwell GT2 laptop. Cc: [email protected] Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
Diffstat (limited to 'src/mesa/main/vdpau.c')
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