Summary: | <dev-util/nvidia-cuda-toolkit-6.5.19 masked, but required with older GPUs | ||
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Product: | Gentoo Linux | Reporter: | Navid Zamani <navid.zamani> |
Component: | Current packages | Assignee: | Gentoo Science Related Packages <sci> |
Status: | RESOLVED CANTFIX | ||
Severity: | normal | CC: | marius.brehler+gentoo |
Priority: | Normal | ||
Version: | unspecified | ||
Hardware: | All | ||
OS: | Linux | ||
Whiteboard: | |||
Package list: | Runtime testing required: | --- |
Description
Navid Zamani
2017-11-22 20:16:07 UTC
Enabling the cuda useflag in the openmpi package just enables CUDA-aware MPI. There is no automatic acceleration! With a GTX 295 you won't be able to use CUDA-aware MPI and furthermore, the MPI code needs to make explicit use of CUDA. CUDA-aware MPI requires a GPU with compute capability 2.0 or later, thus a GPU of the Fermi generation or newer [1]. [1] https://devblogs.nvidia.com/parallelforall/introduction-cuda-aware-mpi/ (In reply to Marius Brehler from comment #1) Aah, alright. MPI… whatever it is… I don’t care about that anyway. :) Thanks. This information was impossible to know or find, apparently. |