From owner-freebsd-hackers Sat Jun 19 12:57:10 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from dhcp9545042.columbus.rr.com (dhcp9545042.columbus.rr.com [24.95.45.42]) by hub.freebsd.org (Postfix) with ESMTP id 1C6381534A for ; Sat, 19 Jun 1999 12:57:07 -0700 (PDT) (envelope-from rowland@dhcp9545042.columbus.rr.com) Received: (from rowland@localhost) by dhcp9545042.columbus.rr.com (8.9.3/8.9.3) id PAA88654; Sat, 19 Jun 1999 15:55:36 -0400 (EDT) (envelope-from rowland) To: Warner Losh Cc: Marc Nicholas , Pat Lynch , hackers@FreeBSD.ORG Subject: Re: SMP and Celerons... References: <199906191707.LAA86070@harmony.village.org> X-Face: "<|%>c@Vfv/8}+Av1z:R5sDzf!3QVer!n\,.&+&h\k1,BHAoyw8Gp10<-SqZ<*"|!U!a#xg6ls?1,Vj$m@r?uHcfB,'i:LLgtyb;~}O8v7zZThuB`X~#IE{v*"PhI]cl/>&ys(MGa%y:6~TuHFw&~|V?!9HZ_R"<}dC5D:%igP2Q6ZJex,P0M From: Shaun Rowland Date: 19 Jun 1999 15:55:36 -0400 In-Reply-To: Warner Losh's message of "Sat, 19 Jun 1999 11:07:36 -0600" Message-ID: <87hfo4c6dj.fsf@dhcp9545042.columbus.rr.com> Lines: 22 X-Mailer: Gnus v5.6.45/XEmacs 21.1 - "20 Minutes to Nikko" Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Warner Losh writes: > In message Marc Nicholas writes: > : Hmmm...I always thought there was something "broke" inside Celerons to > : prevent SMP...maybe I'm wrong? Sure would be neat if you could run them > : SMP... > > What is "broke" about the Celerons is their cache. Without a good > cache sharing, you can't get good SMP performance. While you can run > a SMP Celeron machine, it won't scale as well as the PII version of > the chip. > > Warner Do you mean the ones that don't have cache or the ones that have 128Kb cache on the chip? Is there that big of a hit of the cache is on the chip? I have seen some benchmarks and the system I have seemed to keep up well with a dual PII 400. I don't know how well it would scale though. -- Shaun Rowland rowland@cis.ohio-state.edu http://www.cis.ohio-state.edu/~rowland/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message