QueryCache: rework async downloads.

src/video_core/query_cache.h

@@ -17,13 +17,19 @@
 
 #include "common/assert.h"
 #include "common/settings.h"
+#include "core/memory.h"
 #include "video_core/control/channel_state_cache.h"
 #include "video_core/engines/maxwell_3d.h"
 #include "video_core/memory_manager.h"
 #include "video_core/rasterizer_interface.h"
+#include "video_core/texture_cache/slot_vector.h"
 
 namespace VideoCommon {
 
+using AsyncJobId = SlotId;
+
+static constexpr AsyncJobId NULL_ASYNC_JOB_ID{0};
+
 template <class QueryCache, class HostCounter>
 class CounterStreamBase {
 public:
@@ -93,9 +99,13 @@ private:
 template <class QueryCache, class CachedQuery, class CounterStream, class HostCounter>
 class QueryCacheBase : public VideoCommon::ChannelSetupCaches<VideoCommon::ChannelInfo> {
 public:
-    explicit QueryCacheBase(VideoCore::RasterizerInterface& rasterizer_)
+    explicit QueryCacheBase(VideoCore::RasterizerInterface& rasterizer_,
-        : rasterizer{rasterizer_}, streams{{CounterStream{static_cast<QueryCache&>(*this),
+                            Core::Memory::Memory& cpu_memory_)
-                                                          VideoCore::QueryType::SamplesPassed}}} {}
+        : rasterizer{rasterizer_}, cpu_memory{cpu_memory_}, streams{
+                                       {CounterStream{static_cast<QueryCache&>(*this),
+                                                      VideoCore::QueryType::SamplesPassed}}} {
+        (void) slot_async_jobs.insert(); // Null value
+    }
 
     void InvalidateRegion(VAddr addr, std::size_t size) {
         std::unique_lock lock{mutex};
@@ -126,10 +136,15 @@ public:
             query = Register(type, *cpu_addr, host_ptr, timestamp.has_value());
         }
 
-        query->BindCounter(Stream(type).Current(), timestamp);
+        auto result = query->BindCounter(Stream(type).Current());
-        if (Settings::values.use_asynchronous_gpu_emulation.GetValue()) {
+        if (result) {
-            AsyncFlushQuery(*cpu_addr);
+            auto async_job_id = query->GetAsyncJob();
+            auto& async_job = slot_async_jobs[async_job_id];
+            async_job.collected = true;
+            async_job.value = *result;
+            query->SetAsyncJob(NULL_ASYNC_JOB_ID);
         }
+        AsyncFlushQuery(query, timestamp, lock);
     }
 
     /// Updates counters from GPU state. Expected to be called once per draw, clear or dispatch.
@@ -201,15 +216,25 @@ public:
             committed_flushes.pop_front();
             return;
         }
-        for (VAddr query_address : *flush_list) {
+        for (AsyncJobId async_job_id : *flush_list) {
-            FlushAndRemoveRegion(query_address, 4);
+            AsyncJob& async_job = slot_async_jobs[async_job_id];
+            if (!async_job.collected) {
+                FlushAndRemoveRegion(async_job.query_location, 2, true);
+            }
         }
         committed_flushes.pop_front();
     }
 
 private:
+    struct AsyncJob {
+        bool collected = false;
+        u64 value = 0;
+        VAddr query_location = 0;
+        std::optional<u64> timestamp{};
+    };
+
     /// Flushes a memory range to guest memory and removes it from the cache.
-    void FlushAndRemoveRegion(VAddr addr, std::size_t size) {
+    void FlushAndRemoveRegion(VAddr addr, std::size_t size, bool async = false) {
         const u64 addr_begin = addr;
         const u64 addr_end = addr_begin + size;
         const auto in_range = [addr_begin, addr_end](const CachedQuery& query) {
@@ -230,7 +255,16 @@ private:
                     continue;
                 }
                 rasterizer.UpdatePagesCachedCount(query.GetCpuAddr(), query.SizeInBytes(), -1);
-                query.Flush();
+                AsyncJobId async_job_id = query.GetAsyncJob();
+                auto flush_result = query.Flush(async);
+                if (async_job_id == NULL_ASYNC_JOB_ID) {
+                    ASSERT_MSG(false, "This should not be reachable at all");
+                    continue;
+                }
+                AsyncJob& async_job = slot_async_jobs[async_job_id];
+                async_job.collected = true;
+                async_job.value = flush_result;
+                query.SetAsyncJob(NULL_ASYNC_JOB_ID);
             }
             std::erase_if(contents, in_range);
         }
@@ -257,17 +291,43 @@ private:
         return found != std::end(contents) ? &*found : nullptr;
     }
 
-    void AsyncFlushQuery(VAddr addr) {
+    void AsyncFlushQuery(CachedQuery* query, std::optional<u64> timestamp,
+                         std::unique_lock<std::recursive_mutex>& lock) {
+        const AsyncJobId new_async_job_id = slot_async_jobs.insert();
+        AsyncJob& async_job = slot_async_jobs[new_async_job_id];
+        query->SetAsyncJob(new_async_job_id);
+        async_job.query_location = query->GetCpuAddr();
+        async_job.collected = false;
+
         if (!uncommitted_flushes) {
-            uncommitted_flushes = std::make_shared<std::vector<VAddr>>();
+            uncommitted_flushes = std::make_shared<std::vector<AsyncJobId>>();
         }
-        uncommitted_flushes->push_back(addr);
+        uncommitted_flushes->push_back(new_async_job_id);
+        lock.unlock();
+        std::function<void()> operation([this, new_async_job_id, timestamp] {
+            std::unique_lock local_lock{mutex};
+            AsyncJob& async_job = slot_async_jobs[new_async_job_id];
+            if (timestamp) {
+                u64 timestamp_value = *timestamp;
+                cpu_memory.WriteBlockUnsafe(async_job.query_location + sizeof(u64),
+                                            &timestamp_value, sizeof(8));
+                cpu_memory.WriteBlockUnsafe(async_job.query_location, &async_job.value, sizeof(8));
+            } else {
+                u32 small_value = static_cast<u32>(async_job.value);
+                cpu_memory.WriteBlockUnsafe(async_job.query_location, &small_value, sizeof(u32));
+            }
+            slot_async_jobs.erase(new_async_job_id);
+        });
+        rasterizer.SyncOperation(std::move(operation));
     }
 
     static constexpr std::uintptr_t YUZU_PAGESIZE = 4096;
     static constexpr unsigned YUZU_PAGEBITS = 12;
 
+    SlotVector<AsyncJob> slot_async_jobs;
+
     VideoCore::RasterizerInterface& rasterizer;
+    Core::Memory::Memory& cpu_memory;
 
     mutable std::recursive_mutex mutex;
 
@@ -275,8 +335,8 @@ private:
 
     std::array<CounterStream, VideoCore::NumQueryTypes> streams;
 
-    std::shared_ptr<std::vector<VAddr>> uncommitted_flushes{};
+    std::shared_ptr<std::vector<AsyncJobId>> uncommitted_flushes{};
-    std::list<std::shared_ptr<std::vector<VAddr>>> committed_flushes;
+    std::list<std::shared_ptr<std::vector<AsyncJobId>>> committed_flushes;
 };
 
 template <class QueryCache, class HostCounter>
@@ -295,12 +355,12 @@ public:
     virtual ~HostCounterBase() = default;
 
     /// Returns the current value of the query.
-    u64 Query() {
+    u64 Query(bool async = false) {
         if (result) {
             return *result;
         }
 
-        u64 value = BlockingQuery() + base_result;
+        u64 value = BlockingQuery(async) + base_result;
         if (dependency) {
             value += dependency->Query();
             dependency = nullptr;
@@ -321,7 +381,7 @@ public:
 
 protected:
     /// Returns the value of query from the backend API blocking as needed.
-    virtual u64 BlockingQuery() const = 0;
+    virtual u64 BlockingQuery(bool async = false) const = 0;
 
 private:
     std::shared_ptr<HostCounter> dependency; ///< Counter to add to this value.
@@ -344,26 +404,23 @@ public:
     CachedQueryBase& operator=(const CachedQueryBase&) = delete;
 
     /// Flushes the query to guest memory.
-    virtual void Flush() {
+    virtual u64 Flush(bool async = false) {
         // When counter is nullptr it means that it's just been reset. We are supposed to write a
         // zero in these cases.
-        const u64 value = counter ? counter->Query() : 0;
+        const u64 value = counter ? counter->Query(async) : 0;
-        std::memcpy(host_ptr, &value, sizeof(u64));
+        return value;
-
-        if (timestamp) {
-            std::memcpy(host_ptr + TIMESTAMP_OFFSET, &*timestamp, sizeof(u64));
-        }
     }
 
     /// Binds a counter to this query.
-    void BindCounter(std::shared_ptr<HostCounter> counter_, std::optional<u64> timestamp_) {
+    std::optional<u64> BindCounter(std::shared_ptr<HostCounter> counter_) {
+        std::optional<u64> result{};
         if (counter) {
             // If there's an old counter set it means the query is being rewritten by the game.
             // To avoid losing the data forever, flush here.
-            Flush();
+            result = std::make_optional(Flush());
         }
         counter = std::move(counter_);
-        timestamp = timestamp_;
+        return result;
     }
 
     VAddr GetCpuAddr() const noexcept {
@@ -378,6 +435,14 @@ public:
         return with_timestamp ? LARGE_QUERY_SIZE : SMALL_QUERY_SIZE;
     }
 
+    void SetAsyncJob(AsyncJobId assigned_async_job_) {
+        assigned_async_job = assigned_async_job_;
+    }
+
+    AsyncJobId GetAsyncJob() const {
+        return assigned_async_job;
+    }
+
 protected:
     /// Returns true when querying the counter may potentially block.
     bool WaitPending() const noexcept {
@@ -393,6 +458,7 @@ private:
     u8* host_ptr;                         ///< Writable host pointer.
     std::shared_ptr<HostCounter> counter; ///< Host counter to query, owns the dependency tree.
     std::optional<u64> timestamp;         ///< Timestamp to flush to guest memory.
+    AsyncJobId assigned_async_job;
 };
 
 } // namespace VideoCommon

src/video_core/renderer_opengl/gl_query_cache.cpp

@@ -26,8 +26,8 @@ constexpr GLenum GetTarget(VideoCore::QueryType type) {
 
 } // Anonymous namespace
 
-QueryCache::QueryCache(RasterizerOpenGL& rasterizer_)
+QueryCache::QueryCache(RasterizerOpenGL& rasterizer_, Core::Memory::Memory& cpu_memory_)
-    : QueryCacheBase(rasterizer_), gl_rasterizer{rasterizer_} {}
+    : QueryCacheBase(rasterizer_, cpu_memory_), gl_rasterizer{rasterizer_} {}
 
 QueryCache::~QueryCache() = default;
 
@@ -74,7 +74,7 @@ void HostCounter::EndQuery() {
     glEndQuery(GetTarget(type));
 }
 
-u64 HostCounter::BlockingQuery() const {
+u64 HostCounter::BlockingQuery([[maybe_unused]] bool async) const {
     GLint64 value;
     glGetQueryObjecti64v(query.handle, GL_QUERY_RESULT, &value);
     return static_cast<u64>(value);
@@ -96,7 +96,7 @@ CachedQuery& CachedQuery::operator=(CachedQuery&& rhs) noexcept {
     return *this;
 }
 
-void CachedQuery::Flush() {
+u64 CachedQuery::Flush([[maybe_unused]] bool async) {
     // Waiting for a query while another query of the same target is enabled locks Nvidia's driver.
     // To avoid this disable and re-enable keeping the dependency stream.
     // But we only have to do this if we have pending waits to be done.
@@ -106,11 +106,13 @@ void CachedQuery::Flush() {
         stream.Update(false);
     }
 
-    VideoCommon::CachedQueryBase<HostCounter>::Flush();
+    auto result = VideoCommon::CachedQueryBase<HostCounter>::Flush();
 
     if (slice_counter) {
         stream.Update(true);
     }
+
+    return result;
 }
 
 } // namespace OpenGL

src/video_core/renderer_opengl/gl_query_cache.h

@@ -28,7 +28,7 @@ using CounterStream = VideoCommon::CounterStreamBase<QueryCache, HostCounter>;
 class QueryCache final
     : public VideoCommon::QueryCacheBase<QueryCache, CachedQuery, CounterStream, HostCounter> {
 public:
-    explicit QueryCache(RasterizerOpenGL& rasterizer_);
+    explicit QueryCache(RasterizerOpenGL& rasterizer_, Core::Memory::Memory& cpu_memory_);
     ~QueryCache();
 
     OGLQuery AllocateQuery(VideoCore::QueryType type);
@@ -51,7 +51,7 @@ public:
     void EndQuery();
 
 private:
-    u64 BlockingQuery() const override;
+    u64 BlockingQuery(bool async = false) const override;
 
     QueryCache& cache;
     const VideoCore::QueryType type;
@@ -70,7 +70,7 @@ public:
     CachedQuery(const CachedQuery&) = delete;
     CachedQuery& operator=(const CachedQuery&) = delete;
 
-    void Flush() override;
+    u64 Flush(bool async = false) override;
 
 private:
     QueryCache* cache;

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -63,7 +63,7 @@ RasterizerOpenGL::RasterizerOpenGL(Core::Frontend::EmuWindow& emu_window_, Tegra
       buffer_cache(*this, cpu_memory_, buffer_cache_runtime),
       shader_cache(*this, emu_window_, device, texture_cache, buffer_cache, program_manager,
                    state_tracker, gpu.ShaderNotify()),
-      query_cache(*this), accelerate_dma(buffer_cache, texture_cache),
+      query_cache(*this, cpu_memory_), accelerate_dma(buffer_cache, texture_cache),
       fence_manager(*this, gpu, texture_cache, buffer_cache, query_cache),
       blit_image(program_manager_) {}
 

src/video_core/renderer_vulkan/vk_query_cache.cpp

@@ -66,9 +66,10 @@ void QueryPool::Reserve(std::pair<VkQueryPool, u32> query) {
     }
 }
 
-QueryCache::QueryCache(VideoCore::RasterizerInterface& rasterizer_, const Device& device_,
+QueryCache::QueryCache(VideoCore::RasterizerInterface& rasterizer_,
+                       Core::Memory::Memory& cpu_memory_, const Device& device_,
                        Scheduler& scheduler_)
-    : QueryCacheBase{rasterizer_}, device{device_}, scheduler{scheduler_},
+    : QueryCacheBase{rasterizer_, cpu_memory_}, device{device_}, scheduler{scheduler_},
       query_pools{
           QueryPool{device_, scheduler_, QueryType::SamplesPassed},
       } {}
@@ -100,7 +101,8 @@ HostCounter::HostCounter(QueryCache& cache_, std::shared_ptr<HostCounter> depend
     cache.GetScheduler().Record([logical, query = query](vk::CommandBuffer cmdbuf) {
         const bool use_precise = Settings::IsGPULevelHigh();
         logical->ResetQueryPool(query.first, query.second, 1);
-        cmdbuf.BeginQuery(query.first, query.second, use_precise ? VK_QUERY_CONTROL_PRECISE_BIT : 0);
+        cmdbuf.BeginQuery(query.first, query.second,
+                          use_precise ? VK_QUERY_CONTROL_PRECISE_BIT : 0);
     });
 }
 
@@ -113,8 +115,10 @@ void HostCounter::EndQuery() {
         [query = query](vk::CommandBuffer cmdbuf) { cmdbuf.EndQuery(query.first, query.second); });
 }
 
-u64 HostCounter::BlockingQuery() const {
+u64 HostCounter::BlockingQuery(bool async) const {
+    if (!async) {
         cache.GetScheduler().Wait(tick);
+    }
     u64 data;
     const VkResult query_result = cache.GetDevice().GetLogical().GetQueryResults(
         query.first, query.second, 1, sizeof(data), &data, sizeof(data),

src/video_core/renderer_vulkan/vk_query_cache.h

@@ -52,7 +52,8 @@ private:
 class QueryCache final
     : public VideoCommon::QueryCacheBase<QueryCache, CachedQuery, CounterStream, HostCounter> {
 public:
-    explicit QueryCache(VideoCore::RasterizerInterface& rasterizer_, const Device& device_,
+    explicit QueryCache(VideoCore::RasterizerInterface& rasterizer_,
+                        Core::Memory::Memory& cpu_memory_, const Device& device_,
                         Scheduler& scheduler_);
     ~QueryCache();
 
@@ -83,7 +84,7 @@ public:
     void EndQuery();
 
 private:
-    u64 BlockingQuery() const override;
+    u64 BlockingQuery(bool async = false) const override;
 
     QueryCache& cache;
     const VideoCore::QueryType type;

src/video_core/renderer_vulkan/vk_rasterizer.cpp

@@ -172,7 +172,7 @@ RasterizerVulkan::RasterizerVulkan(Core::Frontend::EmuWindow& emu_window_, Tegra
       buffer_cache(*this, cpu_memory_, buffer_cache_runtime),
       pipeline_cache(*this, device, scheduler, descriptor_pool, update_descriptor_queue,
                      render_pass_cache, buffer_cache, texture_cache, gpu.ShaderNotify()),
-      query_cache{*this, device, scheduler}, accelerate_dma(buffer_cache, texture_cache, scheduler),
+      query_cache{*this, cpu_memory_, device, scheduler}, accelerate_dma(buffer_cache, texture_cache, scheduler),
       fence_manager(*this, gpu, texture_cache, buffer_cache, query_cache, device, scheduler),
       wfi_event(device.GetLogical().CreateEvent()) {
     scheduler.SetQueryCache(query_cache);