From owner-freebsd-chat Mon Sep 22 12:50:45 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id MAA13546 for chat-outgoing; Mon, 22 Sep 1997 12:50:45 -0700 (PDT) Received: from sax.sax.de (sax.sax.de [193.175.26.33]) by hub.freebsd.org (8.8.7/8.8.7) with SMTP id MAA13541 for ; Mon, 22 Sep 1997 12:50:40 -0700 (PDT) Received: (from uucp@localhost) by sax.sax.de (8.6.12/8.6.12-s1) with UUCP id VAA12338; Mon, 22 Sep 1997 21:50:38 +0200 Received: (from j@localhost) by uriah.heep.sax.de (8.8.7/8.8.5) id VAA15355; Mon, 22 Sep 1997 21:39:09 +0200 (MET DST) Message-ID: <19970922213908.GA27029@uriah.heep.sax.de> Date: Mon, 22 Sep 1997 21:39:08 +0200 From: j@uriah.heep.sax.de (J Wunsch) To: freebsd-chat@FreeBSD.ORG Cc: paulg@interlog.com (Paul Griffith) Subject: Re: Linux faster thasn FreeBSD References: <3426A034.76B7@asme.org> X-Mailer: Mutt 0.60_p2-3,5,8-9 Mime-Version: 1.0 X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) Sender: owner-freebsd-chat@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk As Paul Griffith wrote: > > Additionally, it seems like you chose the slowest disk for a swap > > partition and you probably didn't fine tune the kernel ;-). > > > > Pedro. > > So I should use the SCSI HD as my swap space ? Not really. Not after reading your hardware inventory again... With a decent SCSI controller, i would have immediately answered this question with `yes', however. > What basic fine tuning > would you suggest ? Oh well... You've got FreeBSD about at the worst supported hardware at all. ;-) FreeBSD's aic6[23]60 support plain sucks. We consider this driver unsupported (since nobody feels compelled enough to support it), and even with a better driver, the chip remains PIO or motherboard DMA, so it will either bind too much CPU, or rather slow. My tuning advice: try to pick up an old AHA-1540 (even 1540A will do), and then use the SCSI disk for pagiing space. I would be surprised if the machine doesn't feel faster after such a change. There's probably no other well-supported _and_ cheap SCSI controller for this class of hardware; my old scratchbox (386/40) also uses an AHA-1540A. For a PCI machine, the recommendation would be immediately to use a NCR 53c810 part, since they have about the best bang per buck ratio. j@uriah 201% dd if=/dev/rsd0 bs=1m count=20 of=/dev/null &\ dd if=/dev/rsd1 bs=1m count=20 of=/dev/null & [1] 15350 [2] 15351 j@uriah 202% 20+0 records in 20+0 records out 20971520 bytes transferred in 4.486693 secs (4674160 bytes/sec) 20+0 records in 20+0 records out 20971520 bytes transferred in 4.459271 secs (4702903 bytes/sec) 9.3 MB/s over a 10 MHz 8-bit SCSI bus doesn't seem to be very bad. :) (Yeah, i know, i should take sd1 off to the second bus, since this disk can shuffle > 8 MB/s sustained rate alone.) -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)