Date: Mon, 25 Apr 2005 08:21:06 +0200 From: Kirill Ponomarew <krion@voodoo.oberon.net> To: Kris Kennaway <kris@obsecurity.org> Cc: Mike Tancsa <mike@sentex.net> Subject: Re: FreeBSD 6 is coming too fast Message-ID: <20050425062106.GB91852@voodoo.oberon.net> In-Reply-To: <20050425061459.GA33247@xor.obsecurity.org> References: <20050424175543.71041.qmail@web51805.mail.yahoo.com> <20050424151517.O68772@lexi.siliconlandmark.com> <3822.216.177.243.38.1114385370.localmail@webmail.dnswatch.com> <20050425000459.GA28667@xor.obsecurity.org> <6.2.1.2.0.20050424204611.072105a0@64.7.153.2> <20050425010242.GA44110@xor.obsecurity.org> <6.2.1.2.0.20050424210422.03d22990@64.7.153.2> <20050425014453.GA59981@xor.obsecurity.org> <426C6B1D.3040704@elischer.org> <20050425061459.GA33247@xor.obsecurity.org>
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On Sun, Apr 24, 2005 at 11:14:59PM -0700, Kris Kennaway wrote: > > >Measuring disk device performance (i.e. running a benchmark against > > >the bare device) and filesystem performance (writing to a filesystem > > >on the device) are very different things. > > > > I wish people would stop trying to deny that we have serious work in front > > of us to get the VFS and disk IO figures back to where they were before. > > > > there ARE slowdowns and I have seen it both with tests on teh basic > > hardware and throug the filesystems. I don't know why this surproses > > people because we have still a lot of work to do in teh interrupt latency > > field for example, and I doubt that even PHK would say that there is no > > work left to do in geom. > > Where we are now is closing in on "feature complete". Now we need to > > profile and optimise. > > OK, but note that I didn't deny anything, I only questioned whether > the OP was observing a real problem (he didn't mention disk I/O, or in > fact any specific claim) or whether it was a coloured perception based > on the (incorrect) assumption that gcc compilation speed was measuring > a performance loss in FreeBSD. According to gcc-4.0 release notes, compilation speed for C++ was dramatically increased, up to 25% IIRC. I think 4.0 is good candidate for merging into HEAD. -Kirill
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