kc3-lang/angle/src/libANGLE/renderer/metal/mtl_library_cache.h

---

src/libANGLE/renderer/metal/mtl_library_cache.h

---

Log

Author	Commit	Date	CI	Message
	5a77200b	2023-02-08T17:10:28		Metal: Implement parallel shader linking. Update the Metal library cache to be thread safe. Change absl::flat_hash_map back to std::unordered_map because the value types now contain a mutex which must not move. Only generate async compilation tasks for shaders that were not already compiled and in the cache. Collapse some of the link methods in ProgramMtl that only had one call site. All linking is now done in ProgramMtl::link and ProgramMtl::load. Support disabling parallel linking using the new enableParallelMtlLibraryCompilation feature. Bug: chromium:1385510 Change-Id: I71ba71a34d994066729df7e4170911f88c89de4a Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4234153 Reviewed-by: Quyen Le <lehoangquyen@chromium.org> Reviewed-by: Jonah Ryan-Davis <jonahr@google.com> Commit-Queue: Geoff Lang <geofflang@chromium.org>
	9b00af52	2023-02-01T11:10:32		Metal: Add an in-memory MTLLibrary cache. Add a small cache for (msl + compile parameters) -> MTLLibrary at the egl::Display level. In regular executions of Chrome, the same shaders (particularly vertex) are compiled multiple times in different programs. Tested for a regular Chrome startup + open wikipedia + motionmark 1.2: 112/282 (40%) cache hits. Several different caching methods were profiled (LinkProgram perf test) - struct key with std::map : 303309 - struct key with std::unordered_map : 308090 - binary blob key with std::map : 263595 - binary blob key with std::unordered_map : 286051 - struct key + is_transparent with std::unordered_map : 304877 - struct key + is_transparent with absl::flat_hash_map : 335686 Using is_transparent allows us to search the hash map without copying the shader source string to construct the key structure. Bug: chromium:1385510 Change-Id: Ieec4ba526fe286276a4af7114d89cde32a8f9e1d Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4214012 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Geoff Lang <geofflang@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org>