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If you have two or more GPUs, some application can enhance their performance by exploiting P2P high speed connection among the GPUs.

clone cuda-sample repository and build simpleP2P and p2pBandwidthLatencyTest tests:

[root@cld-dfa-gpu-04]# git clone https://github.com/NVIDIA/cuda-samples.git
[root@cld-dfa-gpu-04]# yum -y group install "Development Tools"
[root@cld-dfa-gpu-04]# cd cuda-samples/Samples/0_Introduction/simpleP2P; make; cd
[root@cld-dfa-gpu-04]# cd cuda-samples/Samples/5_Domain_Specific/p2pBandwidthLatencyTest; make; cd