When multiple ranks are used, each rank's first logical device always
has GPU ID 0, regardless of which physical device is selected with
CUDA_VISIBLE_DEVICES. Because of this, when merging trace files from
multiple ranks, GPU IDs from different processes may overlap.
The long term solution is to use the KFD's gpu_id which is stable
across APIs and processes. Unfortunately the gpu_id is not yet exposed
by the ROCr, so for now use the driver's node id.
Change-Id: I2f5af8d2a7e8a89efeb5e0a1b86bdfa547b25fc8
[ROCm/roctracer commit: 799f0323cd]
Laurent Morichetti
644e3b5253