3 Replies Latest reply on Sep 27, 2017 9:19 AM by ray_m

    1080ti P2P crash with Threadripper 1950x


      Hi, Guys,


      I've just installed 2 GTX 1080ti on Threadripper 1950x. And hope these two cards can communicate with unified memory. However, if I run the P2P benchmarks provided by Nvidia's sample (such as simpleP2P, p2pBandwidthLatencyTest), they crash.  The cause should be caused by the following function call:

      cudaMemcpy(g1, g0, buf_size, cudaMemcpyDefault)

      where g0 and g1 are defined as:

      float *g0;
      checkCudaErrors(cudaMalloc(&g0, buf_size));
      float *g1;
      checkCudaErrors(cudaMalloc(&g1, buf_size));


      I've also enabled AMD-V and IOMMU in UEFI options. But it still does not work.

      Hope to get your help. Thanks a lot.