How to measure CPU load programmatically?

David Aldrich92784

Genius 3720 points

My embedded linux app needs to report total cpu load to another system.

How can I measure total cpu load programmatically in Linux?

David

over 12 years ago

0 Carlos Hernandez over 12 years ago

TI__Intellectual 1195 points

David,

As one example you can check the st_cpu_load.c file at http://arago-project.org/git/projects/?p=test-automation/ltp-ddt.git;a=tree;f=testcases/ddt/utils/user;h=81ababda745ac2257f551af38e31ae8203d05b31;hb=3fc540789783a9e2dc0de514cf62f78aae1a2f14

This file is part of the ltp-ddt project hosted at http://arago-project.org/git/projects/?p=test-automation/ltp-ddt.git;a=summary

LTP-DDT contains a collection of test cases that we use to validate some of our Linux PSPs.

Regards,

Carlos

0 David Aldrich92784 over 12 years ago in reply to Carlos Hernandez

Genius 3720 points

Hi Carlos

Thanks, that code is useful in that it shows how to read from /proc/stat.

I need to understand what the data from that file really means. The code you pointed to takes differences between successive reads. Not sure what is really going on there.

David

0 David Aldrich92784 over 12 years ago in reply to David Aldrich92784

Genius 3720 points

I think this article ties up the loose ends:

http://www.linuxhowtos.org/System/procstat.htm

Processors

Processors forum

How to measure CPU load programmatically?