graphics: checkpoint live Vulkan pipeline cache after new compilations

Co-authored-by: fxpw <fxpw@outlook.com>

src/graphics/host_gpu/renderer/pipeline/pipelineCache.cpp

@@ -40,6 +40,8 @@ namespace Libs::Graphics {
 
 namespace {
 
+constexpr auto DriverCacheSaveInterval = std::chrono::minutes {5};
+
 uint8_t RemapSourceAlphaFactor(uint8_t factor) {
 	switch (static_cast<Prospero::BlendFactor>(factor)) {
 		case Prospero::BlendFactor::kSrcAlpha:
@@ -482,7 +484,8 @@ struct PipelineCache::ProgramCache {
 };
 
 PipelineCache::PipelineCache(GraphicContext& graphics)
-    : m_graphics(graphics), m_program_cache(std::make_unique<ProgramCache>(graphics)) {
+    : m_graphics(graphics), m_program_cache(std::make_unique<ProgramCache>(graphics)),
+      m_next_driver_cache_save(std::chrono::steady_clock::now() + DriverCacheSaveInterval) {
 	EXIT_NOT_IMPLEMENTED(!Common::Thread::IsMainThread());
 	InitializeDriverCache();
 }
@@ -590,10 +593,21 @@ void PipelineCache::InitializeDriverCache() {
 	}
 }
 
-void PipelineCache::Save() {
+void PipelineCache::CheckpointDriverCache() {
 	if (m_driver_cache == nullptr) {
 		return;
 	}
+	m_driver_cache_dirty = true;
+	if (std::chrono::steady_clock::now() >= m_next_driver_cache_save) {
+		Save();
+	}
+}
+
+void PipelineCache::Save() {
+	if (m_driver_cache == nullptr || !m_driver_cache_dirty) {
+		return;
+	}
+	m_next_driver_cache_save = std::chrono::steady_clock::now() + DriverCacheSaveInterval;
 
 	size_t               size = 0;
 	vk::Result           result;
@@ -636,16 +650,19 @@ void PipelineCache::Save() {
 	}
 	const bool flushed = !file.IsInvalid() && file.Flush();
 	file.Close();
-	if (prefix_written != prefix.size() || payload_written != payload.size() || !flushed ||
+	const bool written = prefix_written == prefix.size() && payload_written == payload.size() && flushed;
-	    !Common::File::RenameFile(temp_path, m_driver_cache_path)) {
+	std::error_code error;
+	if (written) {
+		std::filesystem::rename(temp_path, m_driver_cache_path, error);
+	}
+	if (!written || error) {
 		PipelineCacheLog("Vulkan pipeline cache: failed to write {}",
 		                 Common::PathToString(m_driver_cache_path));
 		return;
 	}
 	PipelineCacheLog("Vulkan pipeline cache: saved {} bytes to {}", payload.size(),
 	                 Common::PathToString(m_driver_cache_path));
-	m_graphics.device.destroyPipelineCache(m_driver_cache, nullptr);
+	m_driver_cache_dirty = false;
-	m_driver_cache = nullptr;
 }
 
 PipelineCache::GraphicsPrograms PipelineCache::GetGraphicsPrograms(
@@ -984,6 +1001,7 @@ PipelineCache::Pipeline& PipelineCache::GetGraphicsPipeline(
 
 	auto [iter, inserted] = m_graphics_pipelines.emplace(std::move(key), std::move(cached));
 	EXIT_IF(!inserted);
+	CheckpointDriverCache();
 
 	return *iter->second;
 }
@@ -1012,6 +1030,7 @@ PipelineCache::GetComputePipeline(const ShaderComputeInputInfo& input_info,
 
 	auto [iter, inserted] = m_compute_pipelines.emplace(compute_program.id, std::move(cached));
 	EXIT_IF(!inserted);
+	CheckpointDriverCache();
 
 	return *iter->second;
 }

src/graphics/host_gpu/renderer/pipeline/pipelineCache.h

@@ -8,6 +8,7 @@
 #include "graphics/host_gpu/vulkanCommon.h"
 #include "graphics/shader/shader.h"
 
+#include <chrono>
 #include <cstddef>
 #include <filesystem>
 #include <memory>
@@ -173,11 +174,14 @@ private:
 	std::unique_ptr<ProgramCache> m_program_cache;
 	vk::PipelineCache             m_driver_cache = nullptr;
 	std::filesystem::path         m_driver_cache_path;
+	std::chrono::steady_clock::time_point m_next_driver_cache_save;
+	bool                          m_driver_cache_dirty = false;
 	std::unordered_map<GraphicsPipelineKey, std::unique_ptr<Pipeline>, GraphicsPipelineKeyHash>
 	                                                        m_graphics_pipelines;
 	std::unordered_map<uint64_t, std::unique_ptr<Pipeline>> m_compute_pipelines;
 
 	void InitializeDriverCache();
+	void CheckpointDriverCache();
 };
 
 void LogPipelineTrace(const char* phase, uint64_t vertex_program_id, uint64_t pixel_program_id);