Hi Viresh,
On 06/24/2014 10:23 PM, Viresh Kumar wrote:
On 24 June 2014 21:40, Kevin Hilman khilman@linaro.org wrote:
You probably want to watch the IPIs also listed in /proc/interrupts
Yeah, I would be looking for every possible interrupt mentioned in /proc/interrupts..
I gave it some thought, looks like /proc/interrupts is the only way to figure if a cpu is isolated from any other activity.
A task can continue to run on a given cpu as long as a scheduler tick does not occur, so as to choose another task to run or any other interrupt does not trigger. I would have suggested looking at ftrace buffer just like Vincent did, but you mention a few loop holes there. So the surest way is to look at /proc/interrupts as far as I can see.
Regards Preeti U Murthy