Date: Fri, 22 Mar 2002 11:14:37 +1030 From: Greg 'groggy' Lehey <grog@FreeBSD.org> To: John Kozubik <john@kozubik.com> Cc: Patrick Thomas <root@utility.clubscholarship.com>, questions@FreeBSD.ORG Subject: Re: is there overhead in SMP machines related to SMP ? Message-ID: <20020322111437.A463@wantadilla.lemis.com> In-Reply-To: <Pine.BSF.4.21.0203201847050.9183-100000@www> References: <20020321130710.B49090@wantadilla.lemis.com> <Pine.BSF.4.21.0203201847050.9183-100000@www>
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On Wednesday, 20 March 2002 at 18:48:58 -0800, John Kozubik wrote: >> >> Probably something else is going on. You can't really tell just from >> vmstat. Note also that it's not very interesting to optimize the idle >> state. 4.5 has a number of inefficiencies in SMP; we're addressing >> some of them in 5.0. >> > > thanks. if you don't mind I have some miscellaneous questions: > > 1. these inefficiences aren't such that it will keep me from using 4.5 SMP > for production environments, are they ? In general, no. If it didn't work, we wouldn't have released it. But it seems to hit database systems particularly hard. > 2. is 5.0 SMP slated to do 8 processors (or more?) We're not aiming for a specific number of processors. > 3. do you know how many processors sparc64 FreeBSD SMP supports ? Or will > it always be the same number of procs that x86 supports ? No. No. The SPARC64 port is still under development. I'd be surprised if the end result wouldn't run with as many processors as the system has. Greg -- See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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