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D3DQUERYTYPE_TIMESTAMPFREQ Always GetData equal to 0.1GHz

Graphics and GPU Programming Programming

Started by iGrfx October 20, 2016 11:40 AM

0 comments, last by Hodgman 7 years, 6 months ago

iGrfx

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October 20, 2016 11:40 AM

I Use D3DQUERYTYPE_TIMESTAMPFREQ to query GPU Frequency. On my GTX960 PC, the data I got is 100000000. I have test it on other PC which belong to my mates, the Data Still 100000000. I have try the QuerySample from NV and the result is same. What's the right way to use D3DQUERYTYPE_TIMESTAMPFREQ ? Thanks!

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52,717

October 20, 2016 01:04 PM

That's not necessarily the GPU clock frequency... it's just the frequency of some abstracted clock that D3D9 has decided to use.

10 nanosecond resolution is good enough to implement coarse-grained profiler with, which is all the D3D9 timer events are good for anyway.

. 22 Racing Series .

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