Dram__bytes_read.sum is !(n/a)

[sirishgam001]

Hi all,

I am trying to profile using nsight compute cli (ncu). However, the ncu profiler outputs n/a for dram__bytes_read.sum and dram__bytes_write.sum metrics. I am able to see output values for other metrics such as L2 Cache Throughput, L1/TEX Cache Throughput.

Here’s a screenshot from the profiler output:

Setup:

I am using jetson orin board and am running ncu profiler inside jetson-container jetson-containers/docs/build.md at master · dusty-nv/jetson-containers · GitHub. I have provided elevated access to the container by using the command sudo docker run --cap-add=SYS_ADMIN --security-opt seccomp=unconfined --privileged --rm --runtime=nvidia. I have also tried creating a .conf file as mentioned here: NVIDIA Development Tools Solutions - ERR_NVGPUCTRPERM: Permission issue with Performance Counters | NVIDIA Developer.

Any help from the community is highly appreciated!

[felix_dt]

Dram metrics are simply not available on mobile devices, since there is no dedicated dram memory. Instead, the memory is shared between the GPU and the CPU on the SoC. In our section files shipping with the tool, they are therefore disabled on SM versions mapping to mobile chips.