How to measure time spent in context switch
From: Mulyadi Santosa <hidden>
Date: 2012-07-17 04:43:57
Hi... On Tue, Jul 17, 2012 at 2:28 AM, Manavendra Nath Manav [off-list ref] wrote:
How to measure time spent in context switch in Linux i.e. the time the application stays suspended while the kernel is doing something else. I don't want to use any profiling tools. What approach should I take to write my own C code, which can also run as kernel module if required, to measure time spent accurately. Will it also require to modify the scheduler code? Does /proc gives any statistics in this regard?
IMHO, you need to mimic how lmbench does it. And AFAIK too, what you are going to do is very much what lmbench does. But please check their code for better understanding. -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com