Ncu profiling metrics about L2 compression are always 0

My GPU: GPU 0: NVIDIA GeForce RTX 3080;
My system: Ubuntu 18.04;
test code is the nvidia’s github cuda-samples cudaCompressibleMemory;
mu command is :
sudo ncu --metrics lts__gcomp_input_sectors,lts__gcomp_output_sectors,lts__average_gcomp_input_sector_compression_rate,lts__average_gcomp_input_sector_success_rate,lts__average_gcomp_output_sector_compression_achieved_rate ./cudaCompressibleMemory
then i get result:

  saxpy(float, const float4 *, const float4 *, float4 *, unsigned long), 2022-Mar-04 01:16:54, Context 1, Stream 7
    Section: Command line profiler metrics
    ---------------------------------------------------------------------- --------------- ------------------------------
    lts__average_gcomp_input_sector_compression_rate.pct                                 %                              0
    lts__average_gcomp_input_sector_compression_rate.ratio                                                              0
    lts__average_gcomp_input_sector_success_rate.pct                                     %                              0
    lts__average_gcomp_input_sector_success_rate.ratio                                                                  0
    lts__average_gcomp_output_sector_compression_achieved_rate.pct                       %                              0
    lts__average_gcomp_output_sector_compression_achieved_rate.ratio                                                    0
    lts__gcomp_input_sectors.avg                                                    sector                              0
    lts__gcomp_input_sectors.max                                                    sector                              0
    lts__gcomp_input_sectors.min                                                    sector                              0
    lts__gcomp_input_sectors.sum                                                    sector                              0
    lts__gcomp_output_sectors.avg                                                   sector                              0
    lts__gcomp_output_sectors.max                                                   sector                              0
    lts__gcomp_output_sectors.min                                                   sector                              0
    lts__gcomp_output_sectors.sum                                                   sector                              0
    ---------------------------------------------------------------------- --------------- ------------------------------

  saxpy(float, const float4 *, const float4 *, float4 *, unsigned long), 2022-Mar-04 01:16:55, Context 1, Stream 7
    Section: Command line profiler metrics
    ---------------------------------------------------------------------- --------------- ------------------------------
    lts__average_gcomp_input_sector_compression_rate.pct                                 %                              0
    lts__average_gcomp_input_sector_compression_rate.ratio                                                              0
    lts__average_gcomp_input_sector_success_rate.pct                                     %                              0
    lts__average_gcomp_input_sector_success_rate.ratio                                                                  0
    lts__average_gcomp_output_sector_compression_achieved_rate.pct                       %                              0
    lts__average_gcomp_output_sector_compression_achieved_rate.ratio                                                    0
    lts__gcomp_input_sectors.avg                                                    sector                              0
    lts__gcomp_input_sectors.max                                                    sector                              0
    lts__gcomp_input_sectors.min                                                    sector                              0
    lts__gcomp_input_sectors.sum                                                    sector                              0
    lts__gcomp_output_sectors.avg                                                   sector                              0
    lts__gcomp_output_sectors.max                                                   sector                              0
    lts__gcomp_output_sectors.min                                                   sector                              0
    lts__gcomp_output_sectors.sum                                                   sector                              0
    ---------------------------------------------------------------------- --------------- ------------------------------

is this sample right? or what should i do to get non zero result of metrics above?

Thanks for reaching out. We are seeing the same values internally. We are looking into this behavior and will reply back once we have more info to share.

thanks for reply,looking forward to the fix