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d375547c
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2022-08-12T15:54:39
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Do not link program pipeline in glUseProgramStages
1. The commit 3a9f18f135fe82 caused a link to occur everytime
glUseProgramStages is called. This is redundant since the program
pipeline can be linked just before usage, thus allowing for multiple
stages to be bound before linking the executable.
2. Mark PPO as a dirty object and link the PPO in dirty object handler
3. Early return if the same program is being bound to the same stage
of the pipeline.
4. Added ProgramPipelineObjectBenchmark perf test that switches programs
before a draw and observed following data -
1. vulkan profile -
1. wall_time before patch - 102000 ns
2. wall_time after patch - 38000 ns
2. vulkan_null profile -
1. wall_time before patch - 125000 ns
2. wall_time after patch - 52000 ns
Bug: angleproject:5102
Bug: angleproject:6566
Test: ContextNoErrorPPOTest31.*Vulkan
Test: ProgramPipelineTest31.*Vulkan
Test: ProgramPipelineObjectBenchmark*
Change-Id: Idbc2fcb4875bbd040e9ec847eb2a8f96f287173c
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3830170
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: mohan maiya <m.maiya@samsung.com>
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