Date: Wed, 8 Jun 2005 18:51:41 -0400 From: Kris Kennaway <kris@obsecurity.org> To: Matthias Buelow <mkb@incubus.de> Cc: freebsd-stable@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: Performance of 4.x vs 5.x (Re: Lifetime of FreeBSD branches) Message-ID: <20050608225141.GA77978@xor.obsecurity.org> In-Reply-To: <4295153A.9010605@incubus.de> References: <4294054C.9080207@incubus.de> <20050525050943.GA64320@xor.obsecurity.org> <42940A81.1030801@incubus.de> <20050525052214.GA76339@xor.obsecurity.org> <42940C87.5000705@incubus.de> <20050525053054.GA76491@xor.obsecurity.org> <4294AB75.9080908@incubus.de> <20050525185427.GB92006@xor.obsecurity.org> <4294CC9A.1000200@incubus.de> <4295153A.9010605@incubus.de>
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--k+w/mQv8wyuph6w0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, May 26, 2005 at 02:15:54AM +0200, Matthias Buelow wrote: >=20 > >>Others don't see this though, and in other cases it was *definitively > >>proven* to be caused by the issue I mentioned. I'll have to think > >>more about what to try next..thanks for running the tests. > > > >Perhaps it's something SATA-related? >=20 > Before restoring my 5.4 dumps after testing -current, I installed=20 > fedora3 linux just to verify it isn't somehow the hardware itself. Ok,= =20 > plain installation from CDs, kernel "2.6.9-1.667smp" (default=20 > installation kernel). There was absolutely zero noticable lag or any=20 > effect on response time on X11 while untarring the same firefox source.= =20 > So there really seems to be something foul in FreeBSD in that regard.=20 > And now for the dumps.. *sigh*. In case you didn't see it, Jeff identified the probable cause of this and developed the followng patch: http://www.chesapeake.net/~jroberson/flushbuf.diff Does it work for you on 5.4? Kris --k+w/mQv8wyuph6w0 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQFCp3Z8Wry0BWjoQKURAnr/AKDt+wtPFaK9VxuIgMwKirQcajAwEACgvwEF T2EfTwjYODvVRfIiHGLvrgA= =Tq36 -----END PGP SIGNATURE----- --k+w/mQv8wyuph6w0--
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