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// Copyright 2022 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/dawn_caching_interface.h"
#include <cstring>
#include <string_view>
#include <variant>
#include "base/compiler_specific.h"
#include "base/containers/heap_array.h"
#include "base/memory/ptr_util.h"
#include "base/strings/stringprintf.h"
#include "base/task/single_thread_task_runner.h"
#include "base/trace_event/memory_dump_manager.h"
#include "base/trace_event/memory_dump_request_args.h"
#include "base/trace_event/trace_event.h"
#include "gpu/command_buffer/service/gpu_persistent_cache.h"
#include "gpu/config/gpu_preferences.h"
#include "net/base/io_buffer.h"
namespace gpu::webgpu {
DawnCachingInterface::DawnCachingInterface(scoped_refptr<MemoryCache> backend,
CacheBlobCallback callback)
: memory_cache_backend_(std::move(backend)),
cache_blob_callback_(std::move(callback)) {}
DawnCachingInterface::DawnCachingInterface(
scoped_refptr<MemoryCache> backend,
scoped_refptr<GpuPersistentCache> persistent_cache)
: memory_cache_backend_(std::move(backend)),
persistent_cache_(std::move(persistent_cache)) {}
DawnCachingInterface::~DawnCachingInterface() = default;
void DawnCachingInterface::InitializePersistentCache(
persistent_cache::PendingBackend pending_backend,
scoped_refptr<RefCountedGpuProcessShmCount> use_shader_cache_shm_count) {
CHECK(persistent_cache_);
// TODO(crbug.com/399642827): PersistentCache's sqlite backend has default
// in-memory page cache of 2 MB.
// See https://www.sqlite.org/pragma.html#pragma_cache_size
// Since we have our own memory cache here, we might want to disable the
// page cache or at least reduce its max size.
persistent_cache_->InitializeCache(std::move(pending_backend),
std::move(use_shader_cache_shm_count));
}
size_t DawnCachingInterface::LoadData(const void* key,
size_t key_size,
void* value_out,
size_t value_size) {
if (persistent_cache_) {
return persistent_cache_->LoadData(key, key_size, value_out, value_size);
}
if (!memory_cache()) {
return 0u;
}
std::string_view key_str(static_cast<const char*>(key), key_size);
auto entry = memory_cache()->Find(key_str);
if (!entry) {
return 0u;
}
return entry->ReadData(value_out, value_size);
}
void DawnCachingInterface::StoreData(const void* key,
size_t key_size,
const void* value,
size_t value_size) {
if (value == nullptr || value_size <= 0) {
return;
}
if (persistent_cache_) {
persistent_cache_->StoreData(key, key_size, value, value_size);
return;
}
std::string key_str(static_cast<const char*>(key), key_size);
if (memory_cache() != nullptr) {
memory_cache()->Store(
key_str, UNSAFE_BUFFERS(base::span(static_cast<const uint8_t*>(value),
value_size)));
}
// Send the cache entry to be stored on the host-side if applicable.
if (cache_blob_callback_) {
std::string value_str(static_cast<const char*>(value), value_size);
cache_blob_callback_.Run(key_str, value_str);
}
}
DawnCachingInterfaceFactory::DawnCachingInterfaceFactory(BackendFactory factory)
: backend_factory_(factory) {
if (base::SingleThreadTaskRunner::HasCurrentDefault()) {
base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
this, "DawnCache", base::SingleThreadTaskRunner::GetCurrentDefault());
}
}
DawnCachingInterfaceFactory::DawnCachingInterfaceFactory()
: DawnCachingInterfaceFactory(base::BindRepeating(
&DawnCachingInterfaceFactory::CreateDefaultInMemoryBackend)) {}
DawnCachingInterfaceFactory::~DawnCachingInterfaceFactory() {
base::trace_event::MemoryDumpManager::GetInstance()->UnregisterDumpProvider(
this);
}
std::unique_ptr<DawnCachingInterface>
DawnCachingInterfaceFactory::CreateInstance(
const gpu::GpuDiskCacheHandle& handle,
DawnCachingInterface::CacheBlobCallback callback) {
return base::WrapUnique(new DawnCachingInterface(
GetOrCreateMemoryCache(handle), std::move(callback)));
}
std::unique_ptr<DawnCachingInterface>
DawnCachingInterfaceFactory::CreateInstance(
const gpu::GpuDiskCacheHandle& handle,
scoped_refptr<GpuPersistentCache> persistent_cache) {
return base::WrapUnique(new DawnCachingInterface(
GetOrCreateMemoryCache(handle), std::move(persistent_cache)));
}
std::unique_ptr<DawnCachingInterface>
DawnCachingInterfaceFactory::CreateInstance() {
return base::WrapUnique(new DawnCachingInterface(backend_factory_.Run()));
}
scoped_refptr<MemoryCache> DawnCachingInterfaceFactory::GetOrCreateMemoryCache(
const gpu::GpuDiskCacheHandle& handle) {
DCHECK(gpu::GetHandleType(handle) == gpu::GpuDiskCacheType::kDawnWebGPU ||
gpu::GetHandleType(handle) == gpu::GpuDiskCacheType::kDawnGraphite);
if (const auto it = backends_.find(handle); it != backends_.end()) {
return it->second;
}
scoped_refptr<MemoryCache> backend = backend_factory_.Run();
if (backend != nullptr) {
backends_[handle] = backend;
}
return backend;
}
void DawnCachingInterfaceFactory::ReleaseHandle(
const gpu::GpuDiskCacheHandle& handle) {
DCHECK(gpu::GetHandleType(handle) == gpu::GpuDiskCacheType::kDawnWebGPU ||
gpu::GetHandleType(handle) == gpu::GpuDiskCacheType::kDawnGraphite);
backends_.erase(handle);
}
void DawnCachingInterfaceFactory::PurgeMemory(
base::MemoryPressureLevel memory_pressure_level) {
for (auto& [key, backend] : backends_) {
CHECK(std::holds_alternative<GpuDiskCacheDawnGraphiteHandle>(key) ||
std::holds_alternative<GpuDiskCacheDawnWebGPUHandle>(key));
backend->PurgeMemory(memory_pressure_level);
}
}
bool DawnCachingInterfaceFactory::OnMemoryDump(
const base::trace_event::MemoryDumpArgs& args,
base::trace_event::ProcessMemoryDump* pmd) {
const bool is_background =
args.level_of_detail ==
base::trace_event::MemoryDumpLevelOfDetail::kBackground;
for (auto& [key, backend] : backends_) {
if (std::holds_alternative<GpuDiskCacheDawnGraphiteHandle>(key)) {
// There should only be a single graphite cache.
backend->OnMemoryDump("gpu/shader_cache/graphite_cache", pmd);
} else if (!is_background &&
std::holds_alternative<GpuDiskCacheDawnWebGPUHandle>(key)) {
// Note that in memory only webgpu caches aren't stored in `backends_` so
// they won't produce memory dumps.
std::string dump_name = base::StringPrintf(
"gpu/shader_cache/webgpu_cache_0x%X", GetHandleValue(key));
backend->OnMemoryDump(dump_name, pmd);
}
}
return true;
}
scoped_refptr<MemoryCache>
DawnCachingInterfaceFactory::CreateDefaultInMemoryBackend() {
return base::MakeRefCounted<MemoryCache>(GetDefaultGpuDiskCacheSize(),
"DawnCachingInterface::CacheHit");
}
} // namespace gpu::webgpu
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