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Date:      Sun, 24 Jul 2011 21:13:31 +0200
From:      Pieter de Goeje <pieter@degoeje.nl>
To:        freebsd-performance@freebsd.org
Cc:        Eduardo Morras <nec556@retena.com>
Subject:   Re: Heavy I/O blocks FreeBSD box for several seconds
Message-ID:  <201107242113.31479.pieter@degoeje.nl>
In-Reply-To: <4D7F86D50198D837@>
References:  <4E1421D9.7080808@zedat.fu-berlin.de> <5C3302CF-8EE7-489E-8D31-624DA1637B73@mac.com> <4D7F86D50198D837@> (added by postmaster@resmaa14.ono.com)

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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



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