Solved: Re: Advisor roofline analysis on AMD Epyc CPU

Towie__Ewan · ‎10-12-2023

Hi there,

I'm able to run a roofline analysis using Advisor on AMD cpu's, however the roofline plot doesn't show the L1/2/3 cache bandwidth limits, only the DRAM bandwidth.

Is there a way to get Advisor to show the CPU cache bandwidths, or is this a limitation of running on an AMD cpu?

Ruslan_M_Intel · ‎10-13-2023

I'd recommend to use custom roofs for such cases (if you have memory bandwidth values). You can find them in 'Roof Settings' (number 5)

See full description here https://www.intel.com/content/www/us/en/docs/advisor/user-guide/2023-2/intel-advisor-gpu-roofline-chart.html

View solution in original post

JaideepK_Intel · ‎10-13-2023

Hi,

Thank you for posting in Intel communities. We can only offer direct support for Intel hardware platforms that the Intel® oneAPI product supports. Intel provides instructions on how to compile oneAPI code for both CPU and a wide range of GPU accelerators.

https://intel.github.io/llvm-docs/GetStartedGuide.html

We can see that your processor doesn't meet the Intel Advisor system requirements. We recommend you try using an Intel processor & supported operating system as mentioned in the below system requirements page.

Link: https://www.intel.com/content/www/us/en/developer/articles/system-requirements/intel-oneapi-base-toolkit-system-requirements.html

We tried the same on Intel processors and we were able to view L1/L2/L3 bandwidths.

attaching a screenshot for your reference.

Thanks,

Jaideep

Ruslan_M_Intel · ‎10-13-2023

I'd recommend to use custom roofs for such cases (if you have memory bandwidth values). You can find them in 'Roof Settings' (number 5)

See full description here https://www.intel.com/content/www/us/en/docs/advisor/user-guide/2023-2/intel-advisor-gpu-roofline-chart.html

Towie__Ewan · ‎10-13-2023

Hi,

Thanks for the tip, but do you know how to add new rooflines to the 'Roof Settings'?

I did try this, but I can only modify the existing rooflines and not add new ones..

Ruslan_M_Intel · ‎10-13-2023

I don't think it is supported at the moment. However, you can save each config into separate JSON file then switch between them to get specific roof numbers

JaideepK_Intel · ‎10-16-2023

Hi,

Glad to know that your issue is resolved. If you need any additional information, please post a new question as this thread will no longer be monitored by Intel.

Thanks,

Jaideep