为什么GTX 590无法将memHtoD与GPU内核重叠 [英] Why it is not possible to overlap memHtoD with GPU kernel with GTX 590

问题描述

我用cudaSDK"simpleStreams"测试了我的GTX590和GTX680.时间轴结果显示为图片.有人要解释为什么在GTX 590中memC！pyDtoH不能与GTX 680中发生的以前的内核计算重叠吗?

I tested my GTX590 and GTX680 with cudaSDK "simpleStreams". The timeline results are shown as the pictures. Anyone to explain why in GTX 590 memC!pyDtoH cannot overlap with previous kernel computation which happens in GTX 680?

推荐答案

我的GTX 480出现类似的行为.我怀疑费米出了点问题吗? 也许与wddm有关? (此处使用Windows 7 x64)

I get similar behavior with my GTX 480. I suspect something is wrong with Fermi ? maybe related to wddm? (using Windows 7 x64 here)

我尝试了许多不同的驱动程序，并且所有驱动程序都显示出相同的错误行为.您知道已经对GK104进行了正确的测试，而我已经在旧的8800 GTS上进行了测试，并且确实可以使用.似乎费米卡片不起作用:/

I have tried many many different drivers and all of them show the same wrong behavior. You know have tested GK104 proven right and I have already tested it on an old 8800 GTS and it indeed works. It seems the fermi cards doesnt work :/

另请参阅 如何重叠内存传输并在CUDA应用程序中执行内核?

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