Commit ce53aff056e56f5b789a1fc040636fe5a331bf62
2024-11-05T16:57:57
Vulkan: Add per descriptorSet LRU cache eviction Before this CL, the descriptor set cache eviction is at the pool level. Either the entire pool is deleted or not. It is also not LRU based. This CL adds a per descriptor set cache eviction and reuse evicted descriptorSet before allocating a new pool. This eviction is LRU based so that it is more precise. The mCurrentFrameCount is passed into various API so that it can make eviction decision based on the frame number. In this CL, anything not been used in last 10 frames will be evicted and recycled before allocate a new pool. Since eviction is based on individual descriptor set, not by pool, ProgramExecutableVk no longer needs to track the DescriptorSetPool object. mDescriptorPools has been removed from ProgramExecutableVk class. As measured by crrev.com/c/5425496/133 This LRU linked list maintenance does not add any measurable time difference, but reduces total descriptorSet pool count by one third (from 75 down to 48). running test name: "TracePerf", backend: "_vulkan", story: "batman_telltale" Before this CL: cacheMissCount: 200, averageTime:23998 ns cacheHitCount: 1075445, averageTime:626 ns descriptorSetEvicted: 0, descriptorSetPoolCount:75 Average frame time 3.9262 ms After this CL: cacheMissCount: 200, averageTime:23207 ns cacheHitCount: 1025415, averageTime:602 ns descriptorSetEvicted: 102708, descriptorSetPoolCount:48 Average frame time 3.9074 ms BYPASS_LARGE_CHANGE_WARNING Bug: angleproject:372268711 Change-Id: I84daaf46f4557cbbfdb94c10c5386001105f5046 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5985112 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Yuxin Hu <yuxinhu@google.com> Commit-Queue: Charlie Lao <cclao@google.com>