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Drop size restruction bypass for frequently synced buffers

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In cases where large buffers are updated every draw this could seriously increase memory usage beyond 3GB in the megabuffer.
This commit is contained in:
Billy Laws 2022-10-30 16:06:44 +00:00
parent 1088ed514c
commit 1d83dadefb
2 changed files with 4 additions and 2 deletions
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5
app/src/main/cpp/skyline/gpu/buffer.cpp
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@ -354,8 +354,10 @@ namespace skyline::gpu {
return BufferBinding{unifiedMegaBuffer.buffer, unifiedMegaBuffer.offset + offset, size};
}
if (size > MegaBufferingDisableThreshold && sequenceNumber < FrequentlySyncedThresholdHigh)
if (size > MegaBufferingDisableThreshold) {
megaBufferViewAccumulatedSize += size;
return {};
}
size_t entryIdx{offset >> megaBufferTableShift};
size_t bufferEntryOffset{entryIdx << megaBufferTableShift};
@ -409,6 +411,7 @@ namespace skyline::gpu {
void Buffer::unlock() {
tag = ContextTag{};
AllowAllBackingWrites();
lastExecutionNumber = 0;
mutex.unlock();
}

1
app/src/main/cpp/skyline/gpu/buffer.h
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@ -69,7 +69,6 @@ namespace skyline::gpu {
static constexpr u32 InitialSequenceNumber{1}; //!< Sequence number that all buffers start off with
static constexpr u32 FrequentlySyncedThreshold{6}; //!< Threshold for the sequence number after which the buffer is considered elegible for megabuffering
static constexpr u32 FrequentlySyncedThresholdHigh{16}; //!< Threshold for the sequence number after which the buffer is considered elegible for megabuffering irrespective of view size
u32 sequenceNumber{InitialSequenceNumber}; //!< Sequence number that is incremented after all modifications to the host side `backing` buffer, used to prevent redundant copies of the buffer being stored in the megabuffer by views
constexpr static vk::DeviceSize MegaBufferingDisableThreshold{1024 * 256}; //!< The threshold at which a view is considered to be too large to be megabuffered (256KiB)