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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gpu/command_buffer/service/gr_shader_cache.h"
#include <thread>
#include "base/base64.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace gpu {
namespace raster {
namespace {
constexpr char kShaderKey[] = "key";
constexpr char kShader[] = "shader";
constexpr size_t kCacheLimit = 1024u;
} // namespace
class GrShaderCacheTest : public GrShaderCache::Client, public testing::Test {
public:
GrShaderCacheTest() : cache_(kCacheLimit, this) {}
void StoreShader(const std::string& key, const std::string& shader) override {
disk_cache_[key] = shader;
}
GrShaderCache cache_;
std::unordered_map<std::string, std::string> disk_cache_;
};
TEST_F(GrShaderCacheTest, DoesNotCacheForIncognito) {
int32_t incognito_client_id = 2;
auto key = SkData::MakeWithCString(kShaderKey);
auto shader = SkData::MakeWithCString(kShader);
{
GrShaderCache::ScopedCacheUse cache_use(&cache_, incognito_client_id);
EXPECT_EQ(cache_.load(*key), nullptr);
cache_.store(*key, *shader);
}
EXPECT_EQ(disk_cache_.size(), 0u);
int32_t regular_client_id = 3;
cache_.CacheClientIdOnDisk(regular_client_id);
{
GrShaderCache::ScopedCacheUse cache_use(&cache_, regular_client_id);
auto cached_shader = cache_.load(*key);
ASSERT_TRUE(cached_shader);
EXPECT_TRUE(cached_shader->equals(shader.get()));
}
EXPECT_EQ(disk_cache_.size(), 1u);
{
GrShaderCache::ScopedCacheUse cache_use(&cache_, regular_client_id);
auto second_key = SkData::MakeWithCString("key2");
EXPECT_EQ(cache_.load(*second_key), nullptr);
cache_.store(*second_key, *shader);
}
EXPECT_EQ(disk_cache_.size(), 2u);
}
TEST_F(GrShaderCacheTest, LoadedFromDisk) {
int32_t regular_client_id = 3;
cache_.CacheClientIdOnDisk(regular_client_id);
auto key = SkData::MakeWithCopy(kShaderKey, strlen(kShaderKey));
auto shader = SkData::MakeWithCString(kShader);
std::string key_str(static_cast<const char*>(key->data()), key->size());
std::string shader_str(static_cast<const char*>(shader->data()),
shader->size());
std::string encoded_key;
base::Base64Encode(key_str, &encoded_key);
cache_.PopulateCache(encoded_key, shader_str);
{
GrShaderCache::ScopedCacheUse cache_use(&cache_, regular_client_id);
auto cached_shader = cache_.load(*key);
ASSERT_TRUE(cached_shader);
EXPECT_TRUE(cached_shader->equals(shader.get()));
}
EXPECT_EQ(disk_cache_.size(), 0u);
}
TEST_F(GrShaderCacheTest, EnforcesLimits) {
int32_t regular_client_id = 3;
cache_.CacheClientIdOnDisk(regular_client_id);
auto key = SkData::MakeWithCopy(kShaderKey, strlen(kShaderKey));
auto shader = SkData::MakeUninitialized(kCacheLimit);
{
GrShaderCache::ScopedCacheUse cache_use(&cache_, regular_client_id);
EXPECT_EQ(cache_.load(*key), nullptr);
cache_.store(*key, *shader);
}
EXPECT_EQ(cache_.num_cache_entries(), 1u);
{
auto second_key = SkData::MakeWithCString("key2");
GrShaderCache::ScopedCacheUse cache_use(&cache_, regular_client_id);
EXPECT_EQ(cache_.load(*second_key), nullptr);
cache_.store(*second_key, *shader);
}
EXPECT_EQ(cache_.num_cache_entries(), 1u);
{
auto third_key = SkData::MakeWithCString("key3");
GrShaderCache::ScopedCacheUse cache_use(&cache_, regular_client_id);
EXPECT_EQ(cache_.load(*third_key), nullptr);
std::string key_str(static_cast<const char*>(third_key->data()),
third_key->size());
std::string shader_str(static_cast<const char*>(shader->data()),
shader->size());
cache_.PopulateCache(key_str, shader_str);
}
EXPECT_EQ(cache_.num_cache_entries(), 1u);
}
TEST_F(GrShaderCacheTest, MemoryPressure) {
int32_t regular_client_id = 3;
cache_.CacheClientIdOnDisk(regular_client_id);
auto key = SkData::MakeWithCopy(kShaderKey, strlen(kShaderKey));
auto shader = SkData::MakeUninitialized(kCacheLimit);
{
GrShaderCache::ScopedCacheUse cache_use(&cache_, regular_client_id);
EXPECT_EQ(cache_.load(*key), nullptr);
cache_.store(*key, *shader);
}
EXPECT_EQ(cache_.num_cache_entries(), 1u);
cache_.PurgeMemory(
base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL);
EXPECT_EQ(cache_.num_cache_entries(), 0u);
}
TEST_F(GrShaderCacheTest, StoringSameEntry) {
int32_t regular_client_id = 3;
cache_.CacheClientIdOnDisk(regular_client_id);
auto key = SkData::MakeWithCopy(kShaderKey, strlen(kShaderKey));
auto shader = SkData::MakeUninitialized(kCacheLimit);
{
GrShaderCache::ScopedCacheUse cache_use(&cache_, regular_client_id);
EXPECT_EQ(cache_.load(*key), nullptr);
cache_.store(*key, *shader);
}
EXPECT_EQ(cache_.num_cache_entries(), 1u);
EXPECT_EQ(cache_.curr_size_bytes_for_testing(), shader->size());
auto shader2 = SkData::MakeUninitialized(kCacheLimit / 2);
{
GrShaderCache::ScopedCacheUse cache_use(&cache_, regular_client_id);
EXPECT_NE(cache_.load(*key), nullptr);
cache_.store(*key, *shader2);
}
EXPECT_EQ(cache_.num_cache_entries(), 1u);
EXPECT_EQ(cache_.curr_size_bytes_for_testing(), shader2->size());
}
TEST_F(GrShaderCacheTest, PopulateFromDiskAfterStoring) {
int32_t regular_client_id = 3;
cache_.CacheClientIdOnDisk(regular_client_id);
auto key = SkData::MakeWithCopy(kShaderKey, strlen(kShaderKey));
auto shader = SkData::MakeWithCString(kShader);
{
GrShaderCache::ScopedCacheUse cache_use(&cache_, regular_client_id);
EXPECT_EQ(cache_.load(*key), nullptr);
cache_.store(*key, *shader);
}
EXPECT_EQ(cache_.num_cache_entries(), 1u);
EXPECT_EQ(cache_.curr_size_bytes_for_testing(), shader->size());
// Try storing a different shader with the same key.
std::string key_str(static_cast<const char*>(key->data()), key->size());
std::string shader_str(static_cast<const char*>(shader->data()),
shader->size() / 2);
cache_.PopulateCache(key_str, shader_str);
{
GrShaderCache::ScopedCacheUse cache_use(&cache_, regular_client_id);
auto cached_shader = cache_.load(*key);
ASSERT_TRUE(cached_shader);
EXPECT_TRUE(cached_shader->equals(shader.get()));
}
EXPECT_EQ(disk_cache_.size(), 1u);
}
// This test creates GrShaderCache::ScopedCacheUse object from 2 different
// thread which exists together. In a non thread safe GrShaderCache, this will
// hit DCHECKS in ScopedCacheUse::ScopedCacheUse() since the current_client_id
// already exists from 1st object. In a thread safe model, it will not hit
// DCHECKS.
TEST_F(GrShaderCacheTest, MultipleThreadsUsingSameCache) {
int32_t regular_client_id = 3;
int32_t new_client_id = 4;
cache_.CacheClientIdOnDisk(regular_client_id);
auto key = SkData::MakeWithCopy(kShaderKey, strlen(kShaderKey));
auto shader = SkData::MakeWithCString(kShader);
GrShaderCache::ScopedCacheUse cache_use1(&cache_, regular_client_id);
EXPECT_EQ(cache_.load(*key), nullptr);
cache_.store(*key, *shader);
EXPECT_EQ(cache_.num_cache_entries(), 1u);
EXPECT_EQ(cache_.curr_size_bytes_for_testing(), shader->size());
// Different client id to use cache on a different thread.
std::thread second_thread([&]() {
auto key2 = SkData::MakeWithCString("key2");
GrShaderCache::ScopedCacheUse cache_use2(&cache_, new_client_id);
EXPECT_EQ(cache_.load(*key2), nullptr);
// Store same shader on a different key.
cache_.store(*key2, *shader);
});
second_thread.join();
EXPECT_EQ(cache_.num_cache_entries(), 2u);
EXPECT_EQ(cache_.curr_size_bytes_for_testing(), 2 * shader->size());
}
} // namespace raster
} // namespace gpu
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