From owner-freebsd-questions Tue Jan 30 12:36:24 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id MAA27138 for questions-outgoing; Tue, 30 Jan 1996 12:36:24 -0800 (PST) Received: from Sysiphos (Sysiphos.MI.Uni-Koeln.DE [134.95.212.10]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id MAA27130 for ; Tue, 30 Jan 1996 12:36:17 -0800 (PST) Received: by Sysiphos id AA04371 (5.67b/IDA-1.5 for questions@FreeBSD.ORG); Tue, 30 Jan 1996 21:35:54 +0100 Message-Id: <199601302035.AA04371@Sysiphos> From: se@zpr.uni-koeln.de (Stefan Esser) Date: Tue, 30 Jan 1996 21:35:53 +0100 In-Reply-To: "Jonathan M. Bresler" "make world timess" (Jan 30, 11:46) X-Mailer: Mail User's Shell (7.2.6 alpha(2) 7/9/95) To: "Jonathan M. Bresler" Subject: Re: make world timess Cc: questions@freebsd.org Sender: owner-questions@freebsd.org Precedence: bulk On Jan 30, 11:46, "Jonathan M. Bresler" wrote: } Subject: make world timess } > } write-through: } > } 30638.79 real 16447.05 user 3895.20 sys } > } write-back: } > } 25740.88 real 15898.30 user 3779.36 sys } AMD486-66DX2, ASUS SP3G, 8MB (swap swap swap swap) DEC } scsi-ii disk (1/2 gig sold by rod grimes about a year ago, } whole system from him) Ok. You've got (relatively) little DRAM. This explains the variance in real time observed ... } conditions were very similar each time: no one logged in, } xdm and xserver running, quiet but for the 'make world 2>&1 } | tee make.out' } } i have to try it again now that i have 16MB ;) O well, which luxury ;-) But it is very interesting to see how much useful work can be done with such a system. Pentiums are only good for playing 3D games, what else needs that much CPU power :-) } cost of an AMD 5x86 ? I've paid some $107 (*1.45DM/$ * 1.15 VAT). The Cyrix 5x86-100 seems to be sold for the same price, but I've heard it is no faster in the SP3G, since it needs special chip set support. (I could buy the AMD in a local shop, and I'm a little conservative and it seemed a smaller step than the Cyrix :) The Cyrix got a branch target cache and other "Pentium class" features. It is said to beat a P100 (with asynch. cache), though I really doubt it, given the limited memory performance (4 byte vs. 8 byte memory interface of the 486 resp. Pentium.). Regards, Stefan -- Stefan Esser, Zentrum fuer Paralleles Rechnen Tel: +49 221 4706021 Universitaet zu Koeln, Weyertal 80, 50931 Koeln FAX: +49 221 4705160 ============================================================================== http://www.zpr.uni-koeln.de/~se