kc3-lang/angle/src/libANGLE/MemoryShaderCache.cpp

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• Hash : ab334105
  Author :
  Date : 2023-01-23T10:09:56
  

  BuiltInResourcesString is no longer a part of shader cache key
  
  The stringified version of `ShBuiltInResources` is poorly
  maintained and has a large overhead while computing hashes.
  Instead use the `ShBuiltInResources` blob directly.
  
  The shader object now computes and caches its key, refactor
  MemoryProgramCache to query the shader object for its key
  instead of recomputing it.
  
  Tests: EGLProgramCacheControlTest*
  Bug: angleproject:7833
  Change-Id: I67a22f9460cee10ab0f7571df7d6525b476a5a78
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4185759
  Commit-Queue: mohan maiya <m.maiya@samsung.com>
  Reviewed-by: Charlie Lao <cclao@google.com>
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  

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• src/libANGLE/MemoryShaderCache.cpp

• //
  // Copyright 2022 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  // MemoryShaderCache: Stores compiled shader in memory so they don't
  //   always have to be re-compiled. Can be used in conjunction with the platform
  //   layer to warm up the cache from disk.
  
  #include "libANGLE/MemoryShaderCache.h"
  
  #include <GLSLANG/ShaderVars.h>
  #include <anglebase/sha1.h>
  
  #include "common/BinaryStream.h"
  #include "common/utilities.h"
  #include "libANGLE/Compiler.h"
  #include "libANGLE/Context.h"
  #include "libANGLE/Debug.h"
  #include "libANGLE/Uniform.h"
  #include "libANGLE/histogram_macros.h"
  #include "libANGLE/renderer/ShaderImpl.h"
  #include "platform/PlatformMethods.h"
  
  namespace gl
  {
  
  MemoryShaderCache::MemoryShaderCache(egl::BlobCache &blobCache) : mBlobCache(blobCache) {}
  
  MemoryShaderCache::~MemoryShaderCache() {}
  
  angle::Result MemoryShaderCache::getShader(const Context *context,
                                             Shader *shader,
                                             const ShCompileOptions &compileOptions,
                                             const ShCompilerInstance &compilerInstance,
                                             const egl::BlobCache::Key &shaderHash)
  {
      // If caching is effectively disabled, don't bother calculating the hash.
      if (!mBlobCache.isCachingEnabled())
      {
          return angle::Result::Incomplete;
      }
  
      angle::MemoryBuffer uncompressedData;
      switch (mBlobCache.getAndDecompress(context->getScratchBuffer(), shaderHash, &uncompressedData))
      {
          case egl::BlobCache::GetAndDecompressResult::DecompressFailure:
              ANGLE_PERF_WARNING(context->getState().getDebug(), GL_DEBUG_SEVERITY_LOW,
                                 "Error decompressing shader binary data from cache.");
              return angle::Result::Incomplete;
  
          case egl::BlobCache::GetAndDecompressResult::NotFound:
              return angle::Result::Incomplete;
  
          case egl::BlobCache::GetAndDecompressResult::GetSuccess:
              angle::Result result = shader->loadBinary(context, uncompressedData.data(),
                                                        static_cast<int>(uncompressedData.size()));
  
              {
                  std::scoped_lock<std::mutex> lock(mHistogramMutex);
                  ANGLE_HISTOGRAM_BOOLEAN("GPU.ANGLE.ShaderCache.LoadBinarySuccess",
                                          result == angle::Result::Continue);
              }
              ANGLE_TRY(result);
  
              if (result == angle::Result::Continue)
                  return angle::Result::Continue;
  
              // Cache load failed, evict.
              ANGLE_PERF_WARNING(context->getState().getDebug(), GL_DEBUG_SEVERITY_LOW,
                                 "Failed to load shader binary from cache.");
              mBlobCache.remove(shaderHash);
              return angle::Result::Incomplete;
      }
  
      UNREACHABLE();
      return angle::Result::Incomplete;
  }
  
  angle::Result MemoryShaderCache::putShader(const Context *context,
                                             const egl::BlobCache::Key &shaderHash,
                                             const Shader *shader)
  {
      // If caching is effectively disabled, don't bother serializing the shader.
      if (!mBlobCache.isCachingEnabled())
      {
          return angle::Result::Incomplete;
      }
  
      angle::MemoryBuffer serializedShader;
      ANGLE_TRY(shader->serialize(nullptr, &serializedShader));
  
      size_t compressedSize;
      if (!mBlobCache.compressAndPut(shaderHash, std::move(serializedShader), &compressedSize))
      {
          ANGLE_PERF_WARNING(context->getState().getDebug(), GL_DEBUG_SEVERITY_LOW,
                             "Error compressing shader binary data for insertion into cache.");
          return angle::Result::Incomplete;
      }
  
      {
          std::scoped_lock<std::mutex> lock(mHistogramMutex);
          ANGLE_HISTOGRAM_COUNTS("GPU.ANGLE.ShaderCache.ShaderBinarySizeBytes",
                                 static_cast<int>(compressedSize));
      }
  
      return angle::Result::Continue;
  }
  
  void MemoryShaderCache::clear()
  {
      mBlobCache.clear();
  }
  
  size_t MemoryShaderCache::maxSize() const
  {
      return mBlobCache.maxSize();
  }
  
  }  // namespace gl
  

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