Re: SMP CPU Statistics

[Hiten Pandya <hmp@xxxxxxxxxxxxx>]

I am on it.  Expect progress report in three days.

	-Hiten

Matthew Dillon wrote:
> :I'm trying to write a simple CPU load monitor program that can measure load
> :on multiple CPUs. I have been looking at top and ps sourcecode and have
> :come across the kinfo_get_sched_cputime function which is basically a
> :measure of the overall system load. Is there any way to measure load on a
> :per-cpu basis?
> :
> : John
>
>     We have been slowly moving various statistics from globals to
>     per-cpu.  The scheduling stats would be very easy to do but
>     they have not yet been moved.
>
>     Would someone like a go at doing the scheduling stats?  Basically
>     it means:
>
>     (1) moving the struct cp_time in kern/kern_clock.c into the
>         globaldata structure.
>
>     (2) changing the code that updates it in kern/kern_clock.c to update 
> 	the per-cpu version instead.
>
>     (3) Changing the sysctl to return the cp_time for all cpus in an array.
>
>     (4) Changing libkinfo and libkcore to retrieve and aggregate the
> 	cp_time info from all the cpus (and to also give an API to allow
> 	the info from a single cpu to be extracted).
>
> 					-Matt
> 					Matthew Dillon 
> 					<dillon@xxxxxxxxxxxxx>