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Received: by minnie.vk1xwt.ampr.org with NNTP id AA450 ; Sun, 31 Jan 93 14:08:45 EST Path: sserve!manuel.anu.edu.au!munnari.oz.au!spool.mu.edu!howland.reston.ans.net!paladin.american.edu!news.univie.ac.at!hp4at!mcsun!sun4nl!tuegate.tue.nl!svin09!wzv.win.tue.nl!gvr.win.tue.nl!guido From: guido@gvr.win.tue.nl (Guido van Rooij) Newsgroups: comp.unix.bsd Subject: Re: [386BSD] processor caching effect on kernel build Message-ID: <1kk5q6INNm90@wzv.win.tue.nl> Date: 1 Feb 93 21:47:50 GMT References: <1993Jan27.205537.18117@zip.eecs.umich.edu> Organization: Eindhoven University of Technology, The Netherlands Lines: 53 NNTP-Posting-Host: gvr.win.tue.nl dmuntz@quip.eecs.umich.edu (Dan Muntz) writes: >People have been wondering about how the internal and external caches >affect performance under 386bsd. Here are some numbers I got doing kernel >builds. >System: >486DX50 (8k internal cache) EISA >16mb 80ns (4 4Mx9 simms) >Adaptec 1542B (ISA) scsi >Micropolis 1528 scsi disk >256k 20ns external cache >64mb swap (whatever portion of 64mb 386bsd is capable of using) >gcc version 1.39 >both caches disabled: > make depend: 05:38.13 > make: 28:51.15 >external cache enabled, internal disabled: > make depend: 05:37.53 > make: 28:49.88 >internal cache enabled, external disabled: > make depend: 01:35.66 > make: 07:49.75 >both caches enabled: > make depend: 01:25.28 > make: 06:10.84 >Kernel being built is 0.1 + patchkit0.2 + julian's scsi + pcfs + minor patches >Running kernel is the same (and contains NONOP patch recently posted). >You've just got to love 7:36 for building a kernel from scratch :) Hmmm...then my system isn't very bad: System: 486DX33 (8k internal cache) ISA 12mb 70ns (4 4Mx9 simms) Noname ide Seagate st3144a Quantum 120at 128k 20ns external cache 20mb swap gcc version 1.39 Both caches enabled: make depend: 02:09 make: 09:45 Same kernel, no scsi, lots of patches, codrv, no NONOP patch -Guido