Issues

• one_to_all and all_to_one memcpy measurement operations are launched before "warmup" iterations are finished

  NVIDIA/nvbandwidth#70 · Filter by author matthewpopescu opened on Aug 7, 2026
  1

• Build failure with CUDA 13.3: CU_DEVICE_ATTRIBUTE_MULTICAST_SUPPORTED not declared

  NVIDIA/nvbandwidth#68 · Filter by author cscrosati98 opened on Jul 1, 2026
  1

• Query : Difference between D2H BIDIR vs H2D BIDIR

  NVIDIA/nvbandwidth#67 · Filter by author alokprasad opened on Jun 30, 2026
  1

• "GPU Device list" is null object (regardless of GPU count) when json flag is used.

  NVIDIA/nvbandwidth#66 · Filter by author matthewpopescu opened on Apr 21, 2026
  1

• simpleCopyKernel fails to advance the pointers.

  NVIDIA/nvbandwidth#64 · Filter by author Artem-B opened on Apr 9, 2026
  2

  

• Asymmetric bandwidth in bidirectional Host-Device transfers: H2D drops to ~11 GB/s while D2H maintains ~25 GB/s

  NVIDIA/nvbandwidth#53 · Filter by author chanpapa opened on Nov 21, 2025
  7

• Could you please provide reference results?

  NVIDIA/nvbandwidth#50 · Filter by author rsdmse opened on Nov 3, 2025
  1

• multinode benchmarks fail to start with error - [CUDA_ERROR_INVALID_VALUE] invalid argument in expression cuMemSetAccess

  NVIDIA/nvbandwidth#44 · Filter by author chtcvl opened on Jul 29, 2025
  19

• Performance drop in host_to_device_memcpy_sm with large buffers

  NVIDIA/nvbandwidth#42 · Filter by author yuyuankang opened on Jul 5, 2025

• SM memcpy performance concerns on GH200

  NVIDIA/nvbandwidth#41 · Filter by author rajesh-s opened on May 19, 2025
  1

• why is no all-to-one with bidirectional test

  NVIDIA/nvbandwidth#38 · Filter by author houqi opened on Apr 21, 2025

• which metric is spec bandwidth for a gpu

  NVIDIA/nvbandwidth#36 · Filter by author ltm920716 opened on Apr 3, 2025

• ./nvbandwidth -t device_to_device_memcpy_read_ce failed due to unknown issue

  NVIDIA/nvbandwidth#34 · Filter by author plorrrrrrr opened on Feb 17, 2025
  4

• Support for Jetson GPUs (Jetpack 6.0+, Orin)

  NVIDIA/nvbandwidth#28 · Filter by author dicta opened on Dec 16, 2024
  2

• host_to_device_memcpy_sm low than device_to_host_memcpy_sm

  NVIDIA/nvbandwidth#24 · Filter by author ywxc1997 opened on Sep 11, 2024
  3

• failed to run sm read cases on l40s platform

  NVIDIA/nvbandwidth#19 · Filter by author gongysh2004 opened on Feb 29, 2024
  9