CUDA component support for (1) various Compute Capabilities and (2) multiple GPU configurations

[jagode]

Expected behaviors for PAPI CUDA component for:

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1. Systems with single GPU configurations:

• 1.1 - A100 (CC 8.0) requires Perfworks API; does not work with legacy Event API.

• 1.2 - P100 (CC 6.0) does not work with Perfworks API; requires legacy Event API.

• 1.3 - V100 (CC 7.0) works with either Perfworks API or Event API.

  • In PAPI, for CC 7.0 Perfworks API should be used by default;
  • However, if user sets PAPI_CUDA_ROOT to CUPTI version with legacy Event API then that should also work.

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2. Systems with multiple GPU configurations:

• 2.1 - Monitoring events for both A100 and V100 should work fine in PAPI if Perfworks API is used.

  • If Legacy Event API is enabled, then PAPI CUDA should support monitoring for V100 but not A100.
  • In that case, the papi_component_avail output could say something like:
    Name: cuda CUDA profiling via NVIDIA CuPTI interfaces
\-> Partially disabled: System includes multiple compute capabilities: <7.0, =7.0, >7.0.
Only support for CC <=7.0 enabled.

• 2.2 - Monitoring events for both P100 and V100 should work fine in PAPI if Legacy Event API is used.

  • If Perfworks API is enabled, then PAPI CUDA should support monitoring for V100 but not P100.
  • In that case, the papi_component_avail output could say something like:
    Name: cuda CUDA profiling via NVIDIA CuPTI interfaces
\-> Partially disabled: System includes multiple compute capabilities: <7.0, =7.0, >7.0.
Only support for CC >=7.0 enabled.

• 2.3 - Monitoring events for both A100 and P100 is not expected to work.

  • If Legacy Event API is enabled, then PAPI CUDA should support monitoring for P100 (and V100) but not A100.

  • In that case, the papi_component_avail output could say something like:
    Name: cuda CUDA profiling via NVIDIA CuPTI interfaces
\-> Partially disabled: System includes multiple compute capabilities: <7.0, =7.0, >7.0.
Only support for CC <=7.0 enabled.

  • If Perfworks API is enabled, then PAPI CUDA should support monitoring for A100 (and V100) but not P100.

  • In that case, the papi_component_avail output could say something like:
    Name: cuda CUDA profiling via NVIDIA CuPTI interfaces
\-> Partially disabled: System includes multiple compute capabilities: <7.0, =7.0, >7.0.
Only support for CC >=7.0 enabled.