You might want to give LTT a test drive. I has the ability to report
statistics often impossible to get otherwise. There might be other
tools that give you statistics based on samples, but LTT doesn't
rely on sampling, it gives the exact usage of each system component
and enables you to isolate a problem or another to a given task
or system component.
Here's the project's web page: http://www.opersys.com/LTT
If decide to use it, tell me what it provides you with and what
you would like it to provide that it doesn't already do.
Best Regards.
Karim
P.S.: You can run this on a live system and the performance
impact is below 2.5% (from testing I've done 'til now).
sampsa@staff.netsonic.fi wrote:
>
> Hello,
>
> I've got linux boxes working as firewalls (netfilter) and router (policy
> routing, QoS, etc) on my core network, for some time they have been doing
> just fine. But now that the traffic is quite high already, and I'm
> upgrading the main link to internet, I would like to get some statistics
> on how the machines are doing. Is there any way to tell when a machine is
> starting to reach it's limits and run out of CPU time. As far as I've
> understund, the packet filtering, routing and queuing code, etc is run by
> no spesific task and so by is counted to the CPU usage of idle task.
>
> So, if there is no way to log this now, would it be possible solve this,
> start using own thread for this kind of kernel activities, move the
> network code as own kernel thread or count the time used by interrupts,
> or something. CPU time of idle task makes little sense if the main service
> is counted as idle. It would be possible to estimate the CPU usage of
> this functionality, because knowing when you're running out of resources
> if vital.
>
> If there is a way to account this, please, let me know!
>
> - Sampsa Ranta
> sampsa@netsonic.fi
>
> -
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--
===================================================
Karim Yaghmour
karym@opersys.com
Operating System Consultant
(Linux kernel, real-time and distributed systems)
===================================================
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This archive was generated by hypermail 2b29 : Thu Jun 15 2000 - 21:00:23 EST