eden-emu/VulkanMemoryAllocator
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Added "LastUseFrameIndex" to JSON dump. Changed behavior of vmaGetAllocationInfo, vmaTouchAllocation to update allocation.lastUseFrameIndex even if allocation cannot become lost. Documented it.

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This commit is contained in:
Adam Sawicki 2018-05-16 16:17:18 +02:00
parent c22103d183
commit d9bdd6cf78
3 changed files with 162 additions and 108 deletions
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52
src/vk_mem_alloc.h
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@ -686,6 +686,15 @@ in a specified custom pool to lost state.
Allocations that have been "touched" in current frame or VmaPoolCreateInfo::frameInUseCount frames back
cannot become lost.
<b>Q: Can I touch allocation that cannot become lost?</b>
Yes, although it has no visible effect.
Calls to vmaGetAllocationInfo() and vmaTouchAllocation() update last use frame index
also for allocations that cannot become lost, but the only way to observe it is to dump
internal allocator state using vmaBuildStatsString().
You can use this feature for debugging purposes to explicitly mark allocations that you use
in current frame and then analyze JSON dump to see for how long each allocation stays unused.
\page statistics Statistics
@ -5188,6 +5197,9 @@ void VmaAllocation_T::PrintParameters(class VmaJsonWriter& json) const
json.WriteString("CreationFrameIndex");
json.WriteNumber(m_CreationFrameIndex);
json.WriteString("LastUseFrameIndex");
json.WriteNumber(GetLastUseFrameIndex());
if(m_BufferImageUsage != 0)
{
json.WriteString("Usage");
@ -8251,6 +8263,26 @@ void VmaAllocator_T::GetAllocationInfo(VmaAllocation hAllocation, VmaAllocationI
}
else
{
#if VMA_STATS_STRING_ENABLED
uint32_t localCurrFrameIndex = m_CurrentFrameIndex.load();
uint32_t localLastUseFrameIndex = hAllocation->GetLastUseFrameIndex();
for(;;)
{
VMA_ASSERT(localLastUseFrameIndex != VMA_FRAME_INDEX_LOST);
if(localLastUseFrameIndex == localCurrFrameIndex)
{
break;
}
else // Last use time earlier than current time.
{
if(hAllocation->CompareExchangeLastUseFrameIndex(localLastUseFrameIndex, localCurrFrameIndex))
{
localLastUseFrameIndex = localCurrFrameIndex;
}
}
}
#endif
pAllocationInfo->memoryType = hAllocation->GetMemoryTypeIndex();
pAllocationInfo->deviceMemory = hAllocation->GetMemory();
pAllocationInfo->offset = hAllocation->GetOffset();
@ -8288,6 +8320,26 @@ bool VmaAllocator_T::TouchAllocation(VmaAllocation hAllocation)
}
else
{
#if VMA_STATS_STRING_ENABLED
uint32_t localCurrFrameIndex = m_CurrentFrameIndex.load();
uint32_t localLastUseFrameIndex = hAllocation->GetLastUseFrameIndex();
for(;;)
{
VMA_ASSERT(localLastUseFrameIndex != VMA_FRAME_INDEX_LOST);
if(localLastUseFrameIndex == localCurrFrameIndex)
{
break;
}
else // Last use time earlier than current time.
{
if(hAllocation->CompareExchangeLastUseFrameIndex(localLastUseFrameIndex, localCurrFrameIndex))
{
localLastUseFrameIndex = localCurrFrameIndex;
}
}
}
#endif
return true;
}
}