Date: Thu, 01 Apr 2004 15:21:16 +0300 From: Claudiu Dragalina-Paraipan <clau@reversedhell.net> To: freebsd-hackers@freebsd.org Subject: Re: implications of SMP kernel on UP Message-ID: <406C093C.5050204@reversedhell.net> In-Reply-To: <6.0.1.1.1.20040401115446.0378a8f8@imap.sfu.ca> References: <Pine.BSF.4.53.0404010704010.15681@e0-0.zab2.int.zabbadoz.net> <6.0.1.1.1.20040401115446.0378a8f8@imap.sfu.ca>
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig9AEE5FB1F4F062CE714444CD Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit hello, what about SMP enabled kernel on Intel P4 with HT technology ? I have one but I didn't had the chance to test it yet. Colin Percival wrote: > At 08:10 01/04/2004, Bjoern A. Zeeb wrote: > >>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 ?) > > > At least in 5.2-RELEASE, there is a significant performance > delta; buildworld takes about 5% longer on an SMP kernel (and > the time spent in the kernel is 20% longer). > I know some optimizations were done shortly after 5.2, so I > wouldn't be surprised if this situation has improved. > > Colin Percival > With respect, -- Claudiu Dragalina-Paraipan Reversed Hell Networks / reversedhell.net e-mail: clau@reversedhell.net --------------enig9AEE5FB1F4F062CE714444CD Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (MingW32) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFAbAlCm0FWxb+swkQRAgw6AJ4xJP6mujVTgBMpqNrv7e0Qj7V6cACgqlgb eN6Y9HhYDC4lydReH6wqhf4= =dozW -----END PGP SIGNATURE----- --------------enig9AEE5FB1F4F062CE714444CD--
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