unable to run tensorflow on multiple GPUs
The problem disappeared after I installed an older version (352.55) of nvidia driver.
I am running the cifar10 multi-GPU example from the tensorflow repository. I am able to utilize more than one GPUs. My ubuntu PC has two Titan X's, I see memory are fully occupied by the process on both GPUs. However, only one GPU is actually computing. I obtain no speedup. I have tried tensorflow 0.5.0 and 0.6.0 pip binaries. I have also tried compiled from source.
EDIT:
The problem disappeared after I installed an older version of nvidia driver.