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sebbbi / perftest

GPU texture/buffer performance tester
MIT License
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Zero results on NVIDIA Fermi #4

Open ash3D opened 7 years ago

ash3D commented 7 years ago

Benchmark show zero result on NVIDIA Fermi (GeForce GRX 460). Maybe it is bug in driver. I inserted Flush() between dispatch and End for timestamp query and this fixed issue. It does not affected results on other GPUs.

sebbbi commented 7 years ago

Sounds like a driver bug. Adding flush between the dispatch and End would likely put the dispatch and profiling end timestamp recording to different command lists, which could add penalty to timing. But since DX11 is a black box, anything really might happen. Porting this tester to DX12 would simplify some things.