VTune CPU time for performance-snapshot vs hotspot analysis

[bruceh]

I am trying to use VTune to measure CPU time for our tests on Windows so that we can store it in a database and detect any significant increases with code changes.

Given one test, I ran it from the command line and it returns within a couple seconds.  When I run a performance-snapshot analysis on the same test, it also reports an "Elapsed Time" of 1.333s.  But when I run a hotspots analysis, the "Elapsed Time" jumps to 69.441s and the "CPU Time" is reported as 67.015s.

What could cause this huge difference?

Thanks

[JananiC_Intel]

Hi,

Thanks for posting in Intel forums.

Could you share the sample reproducer so that we can try from our end?

Regards,

Janani Chandran

[bruceh]

I'm afraid I cannot provide the test itself because it has proprietary information.  I can provide the vtune output files for the two runs if that helps?

Thanks

Bruce

[JananiC_Intel]

Hi,

Thanks for the update.

We are working on this internally. We will get back to you soon.

Regards,

Janani Chandran

[JaideepK_Intel]

Hi,

I hope you are doing well.

Could you please try the same analysis on the latest version of Intel Vtune and let us know if the issue still persists?

Thanks,

Jaideep

[JaideepK_Intel]

Hi,

I hope you are doing well.

Could you please try the above steps and let us know?

Thanks,

Jaideep

[JaideepK_Intel]

Hi,

We have not heard back from you. This thread will no longer be monitored by Intel. If you need further assistance, please post a new question.

Thanks,

Jaideep