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[dxvk] Limit vkCmdUpdateBuffer size to 4kB

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This should help prevent issues with command buffers becoming
too big. Larger uploads will use a staging buffer instead.
This commit is contained in:
Philip Rebohle 2018-01-13 23:41:36 +01:00
parent 198c9389af
commit e05c961b9e
1 changed files with 3 additions and 1 deletions
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4
src/dxvk/dxvk_context.cpp
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@ -636,7 +636,9 @@ namespace dxvk {
// Vulkan specifies that small amounts of data (up to 64kB) can // Vulkan specifies that small amounts of data (up to 64kB) can
// be copied to a buffer directly if the size is a multiple of // be copied to a buffer directly if the size is a multiple of
// four. Anything else must be copied through a staging buffer. // four. Anything else must be copied through a staging buffer.
if ((size <= 65536) && ((size & 0x3) == 0) && ((offset & 0x3) == 0)) { // We'll limit the size to 4kB in order to keep command buffers
// reasonably small, we do not know how much data apps may upload.
if ((size <= 4096) && ((size & 0x3) == 0) && ((offset & 0x3) == 0)) {
m_cmd->cmdUpdateBuffer( m_cmd->cmdUpdateBuffer(
buffer->handle(), buffer->handle(),
offset, size, data); offset, size, data);