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GPU: Refcount Vulkan allocations to fix transfer corruption on defrag (#15127)

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This commit is contained in:
Evan Hemsley
2026-03-10 13:33:07 -07:00
committed by Sam Lantinga
parent e8f600bf46
commit 96c4104523
1 changed files with 149 additions and 14 deletions
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163
src/gpu/vulkan/SDL_gpu_vulkan.c
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@@ -500,6 +500,7 @@ struct VulkanMemoryAllocation
VkDeviceSize usedSpace;
Uint8 *mapPointer;
SDL_Mutex *memoryLock;
SDL_AtomicInt referenceCount; // Used to avoid defrag races
};
typedef struct VulkanMemoryAllocator
@@ -1040,10 +1041,18 @@ typedef struct VulkanCommandBuffer
Sint32 usedBufferCount;
Sint32 usedBufferCapacity;
VulkanBuffer **buffersUsedInPendingTransfers;
Sint32 buffersUsedInPendingTransfersCount;
Sint32 buffersUsedInPendingTransfersCapacity;
VulkanTexture **usedTextures;
Sint32 usedTextureCount;
Sint32 usedTextureCapacity;
VulkanTexture **texturesUsedInPendingTransfers;
Sint32 texturesUsedInPendingTransfersCount;
Sint32 texturesUsedInPendingTransfersCapacity;
VulkanSampler **usedSamplers;
Sint32 usedSamplerCount;
Sint32 usedSamplerCapacity;
@@ -1205,6 +1214,10 @@ struct VulkanRenderer
SDL_Mutex *descriptorSetLayoutFetchLock;
SDL_Mutex *windowLock;
// We don't want transfer commands to block each other,
// but we want all transfers to block during defrag.
SDL_RWLock *defragLock;
Uint8 defragInProgress;
VulkanMemoryAllocation **allocationsToDefrag;
@@ -1836,6 +1849,8 @@ static Uint8 VULKAN_INTERNAL_AllocateMemory(
allocation->freeRegionCount = 0;
allocation->freeRegionCapacity = 1;
SDL_SetAtomicInt(&allocation->referenceCount, 0);
allocation->allocator = allocator;
result = renderer->vkAllocateMemory(
@@ -2373,7 +2388,7 @@ static Uint8 VULKAN_INTERNAL_BindMemoryForBuffer(
// Resource tracking
#define TRACK_RESOURCE(resource, type, array, count, capacity) \
#define TRACK_RESOURCE(resource, type, array, count, capacity, refcountvar) \
for (Sint32 i = commandBuffer->count - 1; i >= 0; i -= 1) { \
if (commandBuffer->array[i] == resource) { \
return; \
@@ -2388,7 +2403,8 @@ static Uint8 VULKAN_INTERNAL_BindMemoryForBuffer(
} \
commandBuffer->array[commandBuffer->count] = resource; \
commandBuffer->count += 1; \
SDL_AtomicIncRef(&resource->referenceCount);
SDL_AtomicIncRef(&refcountvar)
static void VULKAN_INTERNAL_TrackBuffer(
VulkanCommandBuffer *commandBuffer,
@@ -2399,7 +2415,23 @@ static void VULKAN_INTERNAL_TrackBuffer(
VulkanBuffer *,
usedBuffers,
usedBufferCount,
usedBufferCapacity)
usedBufferCapacity,
buffer->referenceCount);
}
// Use this function when a GPU buffer is part of a transfer operation.
// Note that this isn't for transfer buffers, those don't need to refcount their allocations.
static void VULKAN_INTERNAL_TrackBufferTransfer(
VulkanCommandBuffer *commandBuffer,
VulkanBuffer *buffer)
{
TRACK_RESOURCE(
buffer,
VulkanBuffer *,
buffersUsedInPendingTransfers,
buffersUsedInPendingTransfersCount,
buffersUsedInPendingTransfersCapacity,
buffer->usedRegion->allocation->referenceCount);
}
static void VULKAN_INTERNAL_TrackTexture(
@@ -2411,7 +2443,22 @@ static void VULKAN_INTERNAL_TrackTexture(
VulkanTexture *,
usedTextures,
usedTextureCount,
usedTextureCapacity)
usedTextureCapacity,
texture->referenceCount);
}
// Use this when a texture is part of a transfer operation.
static void VULKAN_INTERNAL_TrackTextureTransfer(
VulkanCommandBuffer *commandBuffer,
VulkanTexture *texture)
{
TRACK_RESOURCE(
texture,
VulkanTexture *,
texturesUsedInPendingTransfers,
texturesUsedInPendingTransfersCount,
texturesUsedInPendingTransfersCapacity,
texture->usedRegion->allocation->referenceCount);
}
static void VULKAN_INTERNAL_TrackSampler(
@@ -2423,7 +2470,8 @@ static void VULKAN_INTERNAL_TrackSampler(
VulkanSampler *,
usedSamplers,
usedSamplerCount,
usedSamplerCapacity)
usedSamplerCapacity,
sampler->referenceCount);
}
static void VULKAN_INTERNAL_TrackGraphicsPipeline(
@@ -2435,7 +2483,8 @@ static void VULKAN_INTERNAL_TrackGraphicsPipeline(
VulkanGraphicsPipeline *,
usedGraphicsPipelines,
usedGraphicsPipelineCount,
usedGraphicsPipelineCapacity)
usedGraphicsPipelineCapacity,
graphicsPipeline->referenceCount);
}
static void VULKAN_INTERNAL_TrackComputePipeline(
@@ -2447,7 +2496,8 @@ static void VULKAN_INTERNAL_TrackComputePipeline(
VulkanComputePipeline *,
usedComputePipelines,
usedComputePipelineCount,
usedComputePipelineCapacity)
usedComputePipelineCapacity,
computePipeline->referenceCount);
}
static void VULKAN_INTERNAL_TrackFramebuffer(
@@ -2459,7 +2509,8 @@ static void VULKAN_INTERNAL_TrackFramebuffer(
VulkanFramebuffer *,
usedFramebuffers,
usedFramebufferCount,
usedFramebufferCapacity);
usedFramebufferCapacity,
framebuffer->referenceCount);
}
static void VULKAN_INTERNAL_TrackUniformBuffer(
@@ -6844,7 +6895,7 @@ static SDL_GPUTexture *VULKAN_CreateTexture(
texture);
VULKAN_INTERNAL_TrackTexture(barrierCommandBuffer, texture);
if (!VULKAN_Submit((SDL_GPUCommandBuffer *)barrierCommandBuffer)) {
VULKAN_ReleaseTexture((SDL_GPURenderer *)renderer, (SDL_GPUTexture *)container);
VULKAN_ReleaseTexture((SDL_GPURenderer *)renderer, (SDL_GPUTexture *)container);
return NULL;
}
}
@@ -8742,8 +8793,9 @@ static void VULKAN_UploadToTexture(
VulkanTextureSubresource *vulkanTextureSubresource;
VkBufferImageCopy imageCopy;
// Note that the transfer buffer does not need a barrier, as it is synced by the client
SDL_LockRWLockForReading(renderer->defragLock);
// Note that the transfer buffer does not need a barrier, as it is synced by the client
vulkanTextureSubresource = VULKAN_INTERNAL_PrepareTextureSubresourceForWrite(
renderer,
vulkanCommandBuffer,
@@ -8783,6 +8835,9 @@ static void VULKAN_UploadToTexture(
VULKAN_INTERNAL_TrackBuffer(vulkanCommandBuffer, transferBufferContainer->activeBuffer);
VULKAN_INTERNAL_TrackTexture(vulkanCommandBuffer, vulkanTextureSubresource->parent);
VULKAN_INTERNAL_TrackTextureTransfer(vulkanCommandBuffer, vulkanTextureSubresource->parent);
SDL_UnlockRWLock(renderer->defragLock);
}
static void VULKAN_UploadToBuffer(
@@ -8797,8 +8852,9 @@ static void VULKAN_UploadToBuffer(
VulkanBufferContainer *bufferContainer = (VulkanBufferContainer *)destination->buffer;
VkBufferCopy bufferCopy;
// Note that the transfer buffer does not need a barrier, as it is synced by the client
SDL_LockRWLockForReading(renderer->defragLock);
// Note that the transfer buffer does not need a barrier, as it is synced by the client
VulkanBuffer *vulkanBuffer = VULKAN_INTERNAL_PrepareBufferForWrite(
renderer,
vulkanCommandBuffer,
@@ -8806,6 +8862,7 @@ static void VULKAN_UploadToBuffer(
cycle,
VULKAN_BUFFER_USAGE_MODE_COPY_DESTINATION);
bufferCopy.srcOffset = source->offset;
bufferCopy.dstOffset = destination->offset;
bufferCopy.size = destination->size;
@@ -8825,6 +8882,9 @@ static void VULKAN_UploadToBuffer(
VULKAN_INTERNAL_TrackBuffer(vulkanCommandBuffer, transferBufferContainer->activeBuffer);
VULKAN_INTERNAL_TrackBuffer(vulkanCommandBuffer, vulkanBuffer);
VULKAN_INTERNAL_TrackBufferTransfer(vulkanCommandBuffer, vulkanBuffer);
SDL_UnlockRWLock(renderer->defragLock);
}
// Readback
@@ -8840,6 +8900,9 @@ static void VULKAN_DownloadFromTexture(
VulkanTextureSubresource *vulkanTextureSubresource;
VulkanBufferContainer *transferBufferContainer = (VulkanBufferContainer *)destination->transfer_buffer;
VkBufferImageCopy imageCopy;
SDL_LockRWLockForReading(renderer->defragLock);
vulkanTextureSubresource = VULKAN_INTERNAL_FetchTextureSubresource(
textureContainer,
source->layer,
@@ -8883,6 +8946,9 @@ static void VULKAN_DownloadFromTexture(
VULKAN_INTERNAL_TrackBuffer(vulkanCommandBuffer, transferBufferContainer->activeBuffer);
VULKAN_INTERNAL_TrackTexture(vulkanCommandBuffer, vulkanTextureSubresource->parent);
VULKAN_INTERNAL_TrackTextureTransfer(vulkanCommandBuffer, vulkanTextureSubresource->parent);
SDL_UnlockRWLock(renderer->defragLock);
}
static void VULKAN_DownloadFromBuffer(
@@ -8896,8 +8962,9 @@ static void VULKAN_DownloadFromBuffer(
VulkanBufferContainer *transferBufferContainer = (VulkanBufferContainer *)destination->transfer_buffer;
VkBufferCopy bufferCopy;
// Note that transfer buffer does not need a barrier, as it is synced by the client
SDL_LockRWLockForReading(renderer->defragLock);
// Note that transfer buffer does not need a barrier, as it is synced by the client
VULKAN_INTERNAL_BufferTransitionFromDefaultUsage(
renderer,
vulkanCommandBuffer,
@@ -8923,6 +8990,9 @@ static void VULKAN_DownloadFromBuffer(
VULKAN_INTERNAL_TrackBuffer(vulkanCommandBuffer, transferBufferContainer->activeBuffer);
VULKAN_INTERNAL_TrackBuffer(vulkanCommandBuffer, bufferContainer->activeBuffer);
VULKAN_INTERNAL_TrackBufferTransfer(vulkanCommandBuffer, bufferContainer->activeBuffer);
SDL_UnlockRWLock(renderer->defragLock);
}
static void VULKAN_CopyTextureToTexture(
@@ -8940,6 +9010,8 @@ static void VULKAN_CopyTextureToTexture(
VulkanTextureSubresource *dstSubresource;
VkImageCopy imageCopy;
SDL_LockRWLockForReading(renderer->defragLock);
srcSubresource = VULKAN_INTERNAL_FetchTextureSubresource(
(VulkanTextureContainer *)source->texture,
source->layer,
@@ -9001,6 +9073,10 @@ static void VULKAN_CopyTextureToTexture(
VULKAN_INTERNAL_TrackTexture(vulkanCommandBuffer, srcSubresource->parent);
VULKAN_INTERNAL_TrackTexture(vulkanCommandBuffer, dstSubresource->parent);
VULKAN_INTERNAL_TrackTextureTransfer(vulkanCommandBuffer, srcSubresource->parent);
VULKAN_INTERNAL_TrackTextureTransfer(vulkanCommandBuffer, dstSubresource->parent);
SDL_UnlockRWLock(renderer->defragLock);
}
static void VULKAN_CopyBufferToBuffer(
@@ -9016,6 +9092,8 @@ static void VULKAN_CopyBufferToBuffer(
VulkanBufferContainer *dstContainer = (VulkanBufferContainer *)destination->buffer;
VkBufferCopy bufferCopy;
SDL_LockRWLockForReading(renderer->defragLock);
VulkanBuffer *dstBuffer = VULKAN_INTERNAL_PrepareBufferForWrite(
renderer,
vulkanCommandBuffer,
@@ -9054,6 +9132,10 @@ static void VULKAN_CopyBufferToBuffer(
VULKAN_INTERNAL_TrackBuffer(vulkanCommandBuffer, srcContainer->activeBuffer);
VULKAN_INTERNAL_TrackBuffer(vulkanCommandBuffer, dstBuffer);
VULKAN_INTERNAL_TrackBufferTransfer(vulkanCommandBuffer, srcContainer->activeBuffer);
VULKAN_INTERNAL_TrackBufferTransfer(vulkanCommandBuffer, dstBuffer);
SDL_UnlockRWLock(renderer->defragLock);
}
static void VULKAN_GenerateMipmaps(
@@ -9067,8 +9149,10 @@ static void VULKAN_GenerateMipmaps(
VulkanTextureSubresource *dstTextureSubresource;
VkImageBlit blit;
SDL_LockRWLockForReading(renderer->defragLock);
// Blit each slice sequentially. Barriers, barriers everywhere!
for (Uint32 layerOrDepthIndex = 0; layerOrDepthIndex < container->header.info.layer_count_or_depth; layerOrDepthIndex += 1)
for (Uint32 layerOrDepthIndex = 0; layerOrDepthIndex < container->header.info.layer_count_or_depth; layerOrDepthIndex += 1) {
for (Uint32 level = 1; level < container->header.info.num_levels; level += 1) {
Uint32 layer = container->header.info.type == SDL_GPU_TEXTURETYPE_3D ? 0 : layerOrDepthIndex;
Uint32 depth = container->header.info.type == SDL_GPU_TEXTURETYPE_3D ? layerOrDepthIndex : 0;
@@ -9147,7 +9231,13 @@ static void VULKAN_GenerateMipmaps(
VULKAN_INTERNAL_TrackTexture(vulkanCommandBuffer, srcTextureSubresource->parent);
VULKAN_INTERNAL_TrackTexture(vulkanCommandBuffer, dstTextureSubresource->parent);
VULKAN_INTERNAL_TrackTextureTransfer(vulkanCommandBuffer, srcTextureSubresource->parent);
VULKAN_INTERNAL_TrackTextureTransfer(vulkanCommandBuffer, dstTextureSubresource->parent);
}
}
SDL_UnlockRWLock(renderer->defragLock);
}
static void VULKAN_EndCopyPass(
@@ -9357,11 +9447,21 @@ static bool VULKAN_INTERNAL_AllocateCommandBuffer(
commandBuffer->usedBuffers = SDL_malloc(
commandBuffer->usedBufferCapacity * sizeof(VulkanBuffer *));
commandBuffer->buffersUsedInPendingTransfersCapacity = 4;
commandBuffer->buffersUsedInPendingTransfersCount = 0;
commandBuffer->buffersUsedInPendingTransfers = SDL_malloc(
commandBuffer->buffersUsedInPendingTransfersCapacity * sizeof(VulkanBuffer *));
commandBuffer->usedTextureCapacity = 4;
commandBuffer->usedTextureCount = 0;
commandBuffer->usedTextures = SDL_malloc(
commandBuffer->usedTextureCapacity * sizeof(VulkanTexture *));
commandBuffer->texturesUsedInPendingTransfersCapacity = 4;
commandBuffer->texturesUsedInPendingTransfersCount = 0;
commandBuffer->texturesUsedInPendingTransfers = SDL_malloc(
commandBuffer->texturesUsedInPendingTransfersCapacity * sizeof(VulkanTexture *));
commandBuffer->usedSamplerCapacity = 4;
commandBuffer->usedSamplerCount = 0;
commandBuffer->usedSamplers = SDL_malloc(
@@ -10430,11 +10530,21 @@ static void VULKAN_INTERNAL_CleanCommandBuffer(
}
commandBuffer->usedBufferCount = 0;
for (Sint32 i = 0; i < commandBuffer->buffersUsedInPendingTransfersCount; i += 1) {
(void)SDL_AtomicDecRef(&commandBuffer->usedBuffers[i]->usedRegion->allocation->referenceCount);
}
commandBuffer->buffersUsedInPendingTransfersCount = 0;
for (Sint32 i = 0; i < commandBuffer->usedTextureCount; i += 1) {
(void)SDL_AtomicDecRef(&commandBuffer->usedTextures[i]->referenceCount);
}
commandBuffer->usedTextureCount = 0;
for (Sint32 i = 0; i < commandBuffer->texturesUsedInPendingTransfersCount; i += 1){
(void)SDL_AtomicDecRef(&commandBuffer->usedTextures[i]->usedRegion->allocation->referenceCount);
}
commandBuffer->texturesUsedInPendingTransfersCount = 0;
for (Sint32 i = 0; i < commandBuffer->usedSamplerCount; i += 1) {
(void)SDL_AtomicDecRef(&commandBuffer->usedSamplers[i]->referenceCount);
}
@@ -10820,8 +10930,30 @@ static bool VULKAN_INTERNAL_DefragmentMemory(
commandBuffer->isDefrag = 1;
SDL_LockMutex(renderer->allocatorLock);
SDL_LockRWLockForWriting(renderer->defragLock);
VulkanMemoryAllocation *allocation = renderer->allocationsToDefrag[renderer->allocationsToDefragCount - 1];
// Find an allocation that doesn't have any pending transfer operations
Sint32 indexToDefrag = -1;
for (Sint32 i = renderer->allocationsToDefragCount - 1; i >= 0; i -= 1) {
if (SDL_GetAtomicInt(&renderer->allocationsToDefrag[i]->referenceCount) == 0) {
indexToDefrag = i;
break;
}
}
if (indexToDefrag == -1) {
// Nothing is available to defrag, but it's not an error
SDL_UnlockRWLock(renderer->defragLock);
SDL_UnlockMutex(renderer->allocatorLock);
return true;
}
VulkanMemoryAllocation *allocation = renderer->allocationsToDefrag[indexToDefrag];
// Plug the hole
if ((Uint32) indexToDefrag != renderer->allocationsToDefragCount - 1) {
renderer->allocationsToDefrag[indexToDefrag] = renderer->allocationsToDefrag[renderer->allocationsToDefragCount - 1];
}
renderer->allocationsToDefragCount -= 1;
/* For each used region in the allocation
@@ -10841,6 +10973,7 @@ static bool VULKAN_INTERNAL_DefragmentMemory(
currentRegion->vulkanBuffer->container != NULL ? currentRegion->vulkanBuffer->container->debugName : NULL);
if (newBuffer == NULL) {
SDL_UnlockRWLock(renderer->defragLock);
SDL_UnlockMutex(renderer->allocatorLock);
SDL_LogError(SDL_LOG_CATEGORY_GPU, "%s", "Failed to allocate defrag buffer!");
return false;
@@ -10906,6 +11039,7 @@ static bool VULKAN_INTERNAL_DefragmentMemory(
&currentRegion->vulkanTexture->container->header.info);
if (newTexture == NULL) {
SDL_UnlockRWLock(renderer->defragLock);
SDL_UnlockMutex(renderer->allocatorLock);
SDL_LogError(SDL_LOG_CATEGORY_GPU, "%s", "Failed to allocate defrag buffer!");
return false;
@@ -10980,6 +11114,7 @@ static bool VULKAN_INTERNAL_DefragmentMemory(
}
}
SDL_UnlockRWLock(renderer->defragLock);
SDL_UnlockMutex(renderer->allocatorLock);
return true;