Dear Ali, Ali Punjani <[email protected]> writes: > We develop scientific software for molecular biology applications using > pyCUDA. A user is having a very strange issue where the same code works > perfectly fine on the same machine (with CUDA 10.1) with GTX 1060 cards, > but not with Titan XP cards. The error message is > > *LogicError: cuMemHostAlloc failed: OS call failed or operation not > supported on this OS* > > Is there any explanation of what this could mean? Initial googling does not > return many reports of anything similar. > > A more detailed report of the issue is here: > https://discuss.cryosparc.com/t/logicerror-cumemhostalloc-failed-os-call-failed-or-operation-not-supported-on-this-os/3278
I'm sorry to say that I've never seen or heard of this error message. One thing that comes to mind is that this might be an issue of PCIe versioning. The 1060 might be PCIe3, while the XP might be PCIe2 (guessing, might be better to check), and driver support might differ. Is this on a Windows or Linux machine? Andreas
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