Date: Fri, 29 Apr 2005 12:40:53 +0300 From: Petri Helenius <pete@he.iki.fi> To: "Arne \"WXrner\"" <arne_woerner@yahoo.com> Cc: freebsd-performance@freebsd.org Subject: Re: Very low disk performance Highpoint 1820a Message-ID: <42720125.3090201@he.iki.fi> In-Reply-To: <20050429081227.11495.qmail@web41207.mail.yahoo.com> References: <20050429081227.11495.qmail@web41207.mail.yahoo.com>
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Arne WXrner wrote: >--- Petri Helenius <pete@he.iki.fi> wrote: > > >>Eric Anderson wrote: >>I'm seeing similar sequential performance on RELENG_5_3 and >>RELENG_5_4 >>on dual-Xeons using 3ware controllers so it does not seem to be >>a driver issue [...] >> >> >> >Why? > >I can remember, that some people said some months before, that >FreeBSD's R4 was much faster (maybe something in the kernel >changed due to SMPng, so that the disc subsystem behaves funny?). > > I mean the issue does not seem to be specific to a controller, but generic in the way how kernel schedules requests. Pete
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