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Article #20626Re: Different speed SIMMs causing slow down
From: Michael A Meiszl
Date: Sat, 09 Apr 1994 06:36
Date: Sat, 09 Apr 1994 06:36
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2064 bytes
In <boonlow.765828469@sfu.ca> boonlow@kits.sfu.ca (Boon Chong Benjamin Low) writes: >he's running memory intensive compilations under Linux. >His first 16mb is 70ns and the other 16mb is 80ns. >Could that pose a problem ?? Very unlikly. If RAM is too slow, he will experiance problems like parity errors or kernel panics, not slowdown. >Also, he has only 64kb of internal cache on the motherboard, would >upgrading to 256kb helps ? He needs 128kb cache for 32Mb ram. Each 32k bank of cache supports 8Mb of Ram. This is only true for a 486, on a 386 the cache controller only uses 8k banks for 8Mb each. If he has a 486 and does not encrease the cache it is very likely that his system will be slow as a dog. If I got it right, Linux is one of the low- loading operating systems, so the slowdown will not be so noticeable until he loads enough tasks to fill up the first 16Mb. SCO Unix for instance loads high, if your kernel resides within a non cached area of memory, you will get the slowdown immediatly. MaM -- * /\/\ichael /\ndreas /\/\eiszl | Tomsonstr 25 | 59071 Hamm | Tel+492381980131 * * mam@mamunx.garmhausen.de <EUNET X.400 EUNET> mam@werries.de * * \C=US \A=ATTMAIL \P=Garmhausen \O=GuPS \G=Michael \I=A \S=Meiszl *
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: ffec8,a0838dc0f6bcb21c X-Google-Attributes: gidffec8,public X-Google-Thread: f8e37,a0838dc0f6bcb21c X-Google-Attributes: gidf8e37,public X-Google-Thread: 10265e,a0838dc0f6bcb21c X-Google-Attributes: gid10265e,public X-Google-ArrivalTime: 1994-04-08 23:36:50 PST Path: arc1-ca.pugleaf.net!gmd.de!Germany.EU.net!mamunx.werries.de!mamunx!mam From: mam@werries.de (Michael A Meiszl) Newsgroups: comp.sys.ibm.pc.hardware,comp.ibm.pc.hardware,biz.comp.hardware Subject: Re: Different speed SIMMs causing slow down Date: 9 Apr 1994 08:36:50 +0200 Organization: MaM's Unix Kiste Lines: 26 Message-ID: <mam.765873026@mamunx> References: <1994Apr8.124008.476@ittpub.nl> <boonlow.765828469@sfu.ca> NNTP-Posting-Host: mamunx.werries.de