Date: Thu, 1 Apr 2004 18:29:04 +0200 From: Thierry Herbelot <thierry@herbelot.com> To: freebsd-hackers@freebsd.org Cc: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> Subject: Re: implications of SMP kernel on UP Message-ID: <200404011829.04221.thierry@herbelot.com> In-Reply-To: <Pine.BSF.4.53.0404010704010.15681@e0-0.zab2.int.zabbadoz.net> References: <Pine.BSF.4.53.0404010704010.15681@e0-0.zab2.int.zabbadoz.net>
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Le Thursday 01 April 2004 09:10, Bjoern A. Zeeb a écrit : > Hi, > > what are the implications on running an SMP enabled kernel on a UP > machine ? > > I first thought of things like: > - performence (most likely not worth the discussion ?) I got an improvement with a factor of ten between an SMP and a UP kernel on a HTT-enabled P4/2,6GHz/800MHz FSB on network transfers (with gigabit Ethernet boards : SMP gives about 6MB/s for FTP transfer rate, and UP gives up to 75MB/s) So : as long as the network stack is not fully locked (this is coming - perhaps for 5.3), a server should definitely run a UP kernel. TfH
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