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From: Eduardo Morras <nec556@retena.com>
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Subject: Re: Heavy I/O blocks FreeBSD box for several seconds
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At 01:15 08/07/2011, you wrote:
>On Jul 7, 2011, at 3:51 PM, Hartmann, O. wrote:
> > This is quibbling. On heavy loads on networ, disk et cetera, 
> isn't there always and also a CPU bound load?
>
>No.  Properly written software blocks when waiting on network or 
>disk I/O, and doesn't sit there spinning in a busy-wait consuming 
>CPU until it actually gets more work to do.
>
>See select(2), kqueue(2), and friends.
>
>Regards,

Excuse me, but where (which maillist) and when did this mail thread 
started? I have searched this maillist archive and freebsd-hackers 
but no success.

TIA

>--
>-Chuck



From owner-freebsd-performance@FreeBSD.ORG  Sun Jul 24 19:46:47 2011
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From: Pieter de Goeje <pieter@degoeje.nl>
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Cc: Eduardo Morras <nec556@retena.com>
Subject: Re: Heavy I/O blocks FreeBSD box for several seconds
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On Sunday 24 July 2011 20:50:14 Eduardo Morras wrote:
> At 01:15 08/07/2011, you wrote:
> >On Jul 7, 2011, at 3:51 PM, Hartmann, O. wrote:
> > > This is quibbling. On heavy loads on networ, disk et cetera,
> >
> > isn't there always and also a CPU bound load?
> >
> >No.  Properly written software blocks when waiting on network or
> >disk I/O, and doesn't sit there spinning in a busy-wait consuming
> >CPU until it actually gets more work to do.
> >
> >See select(2), kqueue(2), and friends.
> >
> >Regards,
>
> Excuse me, but where (which maillist) and when did this mail thread
> started? I have searched this maillist archive and freebsd-hackers
> but no success.
>
> TIA

See http://lists.freebsd.org/pipermail/freebsd-current/2011-July/025740.html

Regards,
Pieter