Date: Thu, 16 Sep 2004 22:39:25 +0200 From: "Jorn Argelo" <jorn@wcborstel.nl> To: "adp" <dap99@i-55.com> Cc: questions@freebsd.org Subject: Re: SMP on SMP-capable system with one processor Message-ID: <20040916203724.M79821@wcborstel.nl> In-Reply-To: <060501c49c18$ad4c3f60$6401a8c0@THEBOX> References: <060501c49c18$ad4c3f60$6401a8c0@THEBOX>
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On Thu, 16 Sep 2004 13:09:22 -0500, adp wrote > We have several Dell-based systems that are dual-processor capable, > but have only one processor. The FreeBSD 4.9 kernels for each > system is compiled with SMP support, even though there is only one > processor on each system right now. > > Would this actually reduce performance on a single processor system? > I know that SMP kernels have to worry about special locking, and may > be doing unnecessary work. > I don't think so. There are probably quite a few machines out there that run the GENERIC kernel, which includes SMP support. Remember it's just support; it's not required for the machine to function. Correct me if I'm wrong though. Cheers, Jorn
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