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Vulkan: Fix incorrect logic in readback preemption

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This could have been causing a large number of command buffer
submissions per frame, depending on when the readbacks occured.
This commit is contained in:
Stenzek
2016-11-20 02:51:53 +10:00
parent 58978c1440
commit a475792163
2 changed files with 10 additions and 0 deletions
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7
Source/Core/VideoBackends/Vulkan/StateTracker.cpp
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@ -792,7 +792,12 @@ void StateTracker::OnEndFrame()
u32 interval = static_cast<u32>(g_ActiveConfig.iCommandBufferExecuteInterval);
for (u32 draw_counter : m_cpu_accesses_this_frame)
{
// We don't want to waste executing command buffers for only a few draws, so set a minimum.
// Leave last_draw_counter as-is, so we get the correct number of draws between submissions.
u32 draw_count = draw_counter - last_draw_counter;
if (draw_count < MINIMUM_DRAW_CALLS_PER_COMMAND_BUFFER_FOR_READBACK)
continue;
if (draw_count <= interval)
{
u32 mid_point = draw_count / 2;
@ -807,6 +812,8 @@ void StateTracker::OnEndFrame()
counter += interval;
}
}
last_draw_counter = draw_counter;
}
}