The GPU architecture is not supported for SASS analysis. Most source information will not be available

Developer Tools Nsight Compute
1

I am new to Nsight Compute. I’m opening my first .ncu-rep file and am seeing this warning/error. The version of nsight compute is 2025.3.1.0. Running on a mac (ARM64). Note that my co-worker with a similar setup is able to view the same .ncu-rep with no error.

Error Message:

The GPU architecture is not supported for SASS analysis. Most source information will not be available.

Please let me know if you have any ideas!

2

Hi, @matthew.kahane

Sorry for the issue you met.

  1. Can you please upload the report for us to check ?
  2. How is the report generated ? What is the GPU ?
  3. Are you generating it on another machine and then copy to Mac or using Mac to do remote profile ?
3

Hi Veraj, I cannot attach the report, but a colleague using 2.1.0 was able to view it without issue. the report is generated on another machine and then copied to mac

4

So you still can open the report, just with warning/error for source info.
Without further info, I am not sure how to help.

6

test_full_128_16.ncu-rep.zip (478.4 KB)

Here is the file. I can open it, but it shows that warning and gives almost no other information that is useful.

7

For instance, here is a screenshot of the speed of light throughput… note that it is expanded (arrow down) and no information is viewable.

Screenshot 2025-11-18 at 10.55.35 PM
Screenshot 2025-11-18 at 10.55.35 PM1968×206 42.6 KB

8

Hi, @matthew.kahane

Thanks for providing the report. I opened it and see the same behavior as you on both linux x64 and mac arm64. And I see related metrics already collected successfully in raw page.

So I though the report may be corrupted but you said the same report can be opened successfully on other machine. I am not sure why.

Can you regenerate a report again to check ?

9

This report is for a Thor chip. The compute capability of this chip was changed between CUDA 12.9 and CUDA 13.0, and the respective ncu versions only understand the matching compute capabilities.

  • If you profile with an ncu from CUDA 12.9 or earlier (ncu 2025.2.1), you need to open the report with the ncu CLI or UI from 12.9 or earlier.
  • Likewise, if you profile with ncu from CUDA 13.0+ (ncu 2025.3.0), you need a CUDA 13.0+ UI.
1 Like
10

Thank you @felix_dt this was the solution. And thank you to @veraj for jumping in and supporting.