Date: Wed, 04 Sep 2002 11:31:42 -0400 (EDT) From: John Baldwin <jhb@FreeBSD.org> To: Andrew Gallatin <gallatin@cs.duke.edu> Cc: alpha@FreeBSD.ORG, peter@FreeBSD.ORG Subject: Re: FYI: Buffer cache fix gave major speedup Message-ID: <XFMail.20020904113142.jhb@FreeBSD.org> In-Reply-To: <15734.5236.873517.46531@grasshopper.cs.duke.edu>
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On 04-Sep-2002 Andrew Gallatin wrote: > > John Baldwin writes: > > > > > > > > If this bug exists in 4.x we should really fix it there as well. > > > > > > > > > > Are you talking about btoc()? I think stable is immune. A simple > > > test shows the buffer cache is working just fine there. > > > > Ah, right. > > Maybe not.. The same simple test on a mid-july -current shows the > buffer cache works there too, I assume: > > <10:07am>monet/gallatin:tmp>du -hs zot > 200M zot > <10:07am>monet/gallatin:tmp>dd if=zot of=/dev/null bs=64k > 3200+0 records in > 3200+0 records out > 209715200 bytes transferred in 1.871934 secs (112031304 bytes/sec) > > (and iostat shows no disk activity) > > I guess I'm confused.. Hmm, using top, I have 0 cache during a cvs up. Mem: 17M Active, 10M Inact, 46M Wired, 51M Buf, 929M Free Hmm, maybe that is ok then? stable has vm.iodirenable on so maybe that's why I don't have any 'cache' and a large 'buf' instead. > Drew -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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