vtune '-collect hotspots' does not work

pg83yandex_ru · ‎03-02-2012

Hi.

I have strange profile results for my program:

# amplxe-cl -duration=20 -collect hotspots ./nehtest 20000

Warning: Failed to stop the sampling timer for the thread 7655.

Warning: Failed to stop the sampling timer for the thread 7653.

Using result path `./r002hs'

Executing actions 16 % Loading data files

Warning: Cannot load data file `./r002hs/data.0/7633-7637.0.log' ().

Executing actions 75 % Generating a report

Summary

-------

Elapsed Time: 3.315

CPU Time: 3.247

Executing actions 100 % done

amplxe-cl -duration=20 -collect hotspots ./nehtest 20000Warning: Failed to stop the sampling timer for the thread 7655.Warning: Failed to stop the sampling timer for the thread 7653.Using result path `./r002hs'Executing actions 16 % Loading data files Warning: Cannot load data file `./r002hs/data.0/7633-7637.0.log' ().Executing actions 75 % Generating a report Summary-------
Elapsed Time: 3.315CPU Time: 3.247Executing actions 100 % done

Instead of 20 seconds, it works 3 seconds, without producing good results.

Simple 'amplxe-cl -duration=20 -collect hotspots ls -la' works fine.

uname -a

Linux laptop 3.2.0-17-generic #27-Ubuntu SMP Fri Feb 24 22:03:50 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

Rob5 · ‎03-02-2012

There have been several instances where similar behavior was resolved by installing the latest version Update 7. Are you running Update 7? If not can you install the latest version?

- Rob

pg83yandex_ru · ‎03-03-2012

Already have it:

# amplxe-cl --version

Intel VTune Amplifier XE 2011 Update 7 (build 206420) Command Line Tool

Rob5 · ‎03-05-2012

For hotspots analysis, the -duration only specifies the time limit in seconds for the analysis. If your application runs for a shorter time than what duration is set to, the analysis will stop. Can you let me know how long your application runs outside of Intel VTune Amplifier XE? If it does run for only 3 or so seconds, can you significantly increase the number of seconds your application runs to see if the behavior changes? Can you let me know more about the nature of your application ./nehtest? What libraries are being called? Are you able to provide a sample application that reproduces the behavior?

Thanks
Rob