Date: Mon, 17 Mar 2003 09:56:32 -0800 From: Brooks Davis <brooks@one-eyed-alien.net> To: Artur Enaliev <artur@nt-hosting.ru> Cc: Brooks Davis <brooks@one-eyed-alien.net>, freebsd-smp@FreeBSD.ORG Subject: Re: SMP on SE7500WV2 boards Message-ID: <20030317095632.C21173@Odin.AC.HMC.Edu> In-Reply-To: <016e01c2ecab$cf6aa230$6901010a@labs.cybiko.com>; from artur@nt-hosting.ru on Mon, Mar 17, 2003 at 08:36:49PM %2B0300 References: <006701c2ec6e$ed4f4c70$6901010a@labs.cybiko.com> <20030317083844.B21173@Odin.AC.HMC.Edu> <016e01c2ecab$cf6aa230$6901010a@labs.cybiko.com>
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--ALfTUftag+2gvp1h Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Mar 17, 2003 at 08:36:49PM +0300, Artur Enaliev wrote: > Thanks a lot .. I'm not sure i should install '-current' on the production > server.. > btw.. does it increase system performance when use SMP kernel on the syst= em > with single Intel P-4 Xeon CPU with hyperthreading? I haven't tried it, but I suspect the answer is "it depends". The logical CPUs share resources (particularly cache) so they contend with each other which can result in worse performance. On the other hand, one logical CPU can do work while the other is stalled so you may see an improvement in some applictions. -- Brooks --=20 Any statement of the form "X is the one, true Y" is FALSE. PGP fingerprint 655D 519C 26A7 82E7 2529 9BF0 5D8E 8BE9 F238 1AD4 --ALfTUftag+2gvp1h Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQE+dgxPXY6L6fI4GtQRAmcCAKDQk5wPTv4e7BExzIR+F8dMaGpV0ACgis36 c+TFPyUKiX3MHVa2PCokw2U= =YLp4 -----END PGP SIGNATURE----- --ALfTUftag+2gvp1h-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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