Force the flush through the GetData call in Renderer11::finish.

NVIDIA drivers sometimes go into infinite loops in this code, jbauman@ speculated that these drivers may need to do the flush in the GetData call. BUG=626849 Change-Id: I85408fbe7176242240862225e968f557bd7818cf Reviewed-on: https://chromium-review.googlesource.com/360130Reviewed-by: John Bauman <jbauman@chromium.org> Commit-Queue: Geoff Lang <geofflang@chromium.org>

Force the flush through the GetData call in Renderer11::finish.
2be29497 · Geoff Lang · Commit Bot · fed6d0e2 · 2be29497
Commit 2be29497 authored Jul 12, 2016 by Geoff Lang Committed by Commit Bot Jul 19, 2016
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Renderer11.cpp src/libANGLE/renderer/d3d/d3d11/Renderer11.cpp +6 -2

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--- a/src/libANGLE/renderer/d3d/d3d11/Renderer11.cpp
+++ b/src/libANGLE/renderer/d3d/d3d11/Renderer11.cpp
@@ -1102,11 +1102,15 @@ gl::Error Renderer11::finish()
    }
    mDeviceContext->End(mSyncQuery);
-    mDeviceContext->Flush();
+    unsigned int attempt = 0;
    do
    {
-        result = mDeviceContext->GetData(mSyncQuery, NULL, 0, D3D11_ASYNC_GETDATA_DONOTFLUSH);
+        unsigned int flushFrequency = 100;
+        UINT flags = (attempt % flushFrequency == 0) ? 0 : D3D11_ASYNC_GETDATA_DONOTFLUSH;
+        attempt++;
+        result = mDeviceContext->GetData(mSyncQuery, NULL, 0, flags);
        if (FAILED(result))
        {
            return gl::Error(GL_OUT_OF_MEMORY, "Failed to get event query data, result: 0x%X.", result);