Performance Evaluation of Linux Scheduler

Question

Hi

I have done some simple changes to the scheduler in the Linux Kernel. Now, I would like to see how those changes affect the response time of the system; in other words, I would like to know how long a context switch takes with my modifications compared to the original scheduler. A straightforward approach would be to use the time stamp counter, and use then the printk to output the time it took for the context switch; obviously, in this case a lot of information is printed out. So I wonder if there is any other, better approach to measure the Linux scheduler response time?

Thanks

Answer 1

Does this scheduler benchmark help perhaps? It's from 1998, but perhaps the C source code can be used as a base.

Answer 2

There are several kernel-level trace frameworks, which might help you. See the Kernel Trace Systems page on eLinux.org for a nice overview of the available options.