Date: Wed, 18 Aug 2004 11:07:39 +0200 From: =?iso-8859-2?q?S=B3awek_=AFak?= <zaks@prioris.mini.pw.edu.pl> To: Julian Elischer <julian@elischer.org> Cc: freebsd-current@freebsd.org Subject: Re: Deadlocks with recent SMP current Message-ID: <863c2kolus.fsf@thirst.unx.era.pl> In-Reply-To: <41223C15.7050305@elischer.org> (Julian Elischer's message of "Tue, 17 Aug 2004 10:10:45 -0700") References: <20040813121208.M31181@cvs.imp.ch> <86y8kfqcp8.fsf@thirst.unx.era.pl> <41223C15.7050305@elischer.org>
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Julian Elischer <julian@elischer.org> writes:
> Sławek Żak wrote:
[...]
>> MySQLd is running with libpthread and can go up to 400% without
>> significantly afecting the idle percentage shown by top. I don't see how I
>> could fit 400% into 20% on those two suckers, therefore I ask :)
>
> Cpu percentage use is broken for pthread applications..
> it's almost impossible to work out the right way of doing it
> due to the nature of M:N threading where there is no fixed rule as
> to which user thread is run by which kernel thread.
>
> I have ideas but it will probably have to be an aggreagate cpu% for the thread
> group, divided by the number of kernel threads in the group.
Well. Better this than the current sorry, saying nothing number :)
/S
--
Sławek Żak : UNIX Systems Administrator : PTC Sp. zoo
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