Hi,
after installing CUDA on a CentOS 7.2 server with GTX 1080 Ti GPU the performance is very poor, significantly slower than the GTX 1080 GPUs on another server.
The bandwidth test shows following (1080 Ti GPU):
sudo /usr/local/cuda-8.0/samples/1_Utilities/bandwidthTest/bandwidthTest
[CUDA Bandwidth Test] - Starting…
Running on…
Device 0: Graphics Device
Quick Mode
Host to Device Bandwidth, 1 Device(s)
PINNED Memory Transfers
Transfer Size (Bytes) Bandwidth(MB/s)
33554432 3906.3
Device to Host Bandwidth, 1 Device(s)
PINNED Memory Transfers
Transfer Size (Bytes) Bandwidth(MB/s)
33554432 2650.9
Device to Device Bandwidth, 1 Device(s)
PINNED Memory Transfers
Transfer Size (Bytes) Bandwidth(MB/s)
33554432 343047.4
Result = PASS
1080 GPU on an other server shows following:
sudo ./bandwidthTest
[CUDA Bandwidth Test] - Starting…
Running on…
Device 0: GeForce GTX 1080
Quick Mode
Host to Device Bandwidth, 1 Device(s)
PINNED Memory Transfers
Transfer Size (Bytes) Bandwidth(MB/s)
33554432 12439.3
Device to Host Bandwidth, 1 Device(s)
PINNED Memory Transfers
Transfer Size (Bytes) Bandwidth(MB/s)
33554432 12879.3
Device to Device Bandwidth, 1 Device(s)
PINNED Memory Transfers
Transfer Size (Bytes) Bandwidth(MB/s)
33554432 231598.8
Result = PASS
Device to host and host to device values are significantly lower for the Ti card.
Any idea for the reason?