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Date:      Fri, 20 Jan 2006 11:16:33 -0800
From:      Julian Elischer <julian@elischer.org>
To:        Kris Kennaway <kris@obsecurity.org>
Cc:        Gleb Smirnoff <glebius@freebsd.org>, current@freebsd.org
Subject:   Re: kernel thread as real threads..
Message-ID:  <43D13711.9000509@elischer.org>
In-Reply-To: <20060120095214.GA11088@xor.obsecurity.org>
References:  <43D05151.5070409@elischer.org>	<20060120030105.GA5286@xor.obsecurity.org>	<43D0715A.7020302@elischer.org>	<20060120061955.GA8687@xor.obsecurity.org>	<20060120085226.GQ83922@FreeBSD.org> <43D0AB26.5070407@samsco.org> <20060120095214.GA11088@xor.obsecurity.org>

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Kris Kennaway wrote:

>
>Correct me if I'm wrong, but the stats aren't accounted to the parent
>process either.  I'm pretty sure I've seen situations where a thread
>was using a lot of CPU, but if you believe top(1) then every process
>in the system is idle (except for the fact that the system is 0%
>idle).  In this situation there's no way to tell which threaded
>process is using resources.
>  
>

you may be right.. I plan to examine stats over the next week as part of 
the kernel threads work.
I may be able to improve the situation.

my aim is that for threads that are doing M:N work the stats will 
accumulate on the thread
for a short while and then be collected to the KSEG when ther eis reason 
to think that
the kernel thread has changed purpose or exits (both of which happen a 
lot in KSE).

for 1:1 threads, they will continue to accumulate on the thread, since 
no "KSE events" will
occur.

The KSEGRPs stats will be collected to the process when asked for.
I will probably also change the way that 'ps' shows these (and threads). 
I'm not sure what to do about top yet. we really need to be able to show a
process name AND a thread name when the threads are shown and have names.

>Kris
>



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