Date: Tue, 24 May 2005 09:20:35 -0700 From: Kris Kennaway <kris@obsecurity.org> To: Krzysztof Kowalik <kkowalik@uci.agh.edu.pl> 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: <20050524162034.GA59728@xor.obsecurity.org> In-Reply-To: <20050524143726.GA29642@uci.agh.edu.pl> References: <3248.172.16.0.199.1116876092.squirrel@172.16.0.1> <20050523195123.GA13810@xor.obsecurity.org> <3482.172.16.0.199.1116882013.squirrel@172.16.0.1> <20050523211307.GA36552@xor.obsecurity.org> <42924949.1070902@incubus.de> <20050523213155.GA46718@xor.obsecurity.org> <20050524143726.GA29642@uci.agh.edu.pl>
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--yrj/dFKFPuw6o+aM Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, May 24, 2005 at 04:37:26PM +0200, Krzysztof Kowalik wrote: > Kris Kennaway [kris@obsecurity.org] wrote: > > [...] One obvious guess is that it's due to VFS being under Giant, > > which causes lots of contention with other subsystems that also > > require Giant, and therefore introduces latency. If so, you'd see a > > substantial performance improvement on 6.0 with debug.mpsafevfs=3D1. >=20 > I didn't see any visible difference, in the given scenario of > uncompressing firefox's sources, when tried mpsafevfs's patches when > they got announced on current@. There have been a *lot* of changes in this area since the initial patches (i.e. continued removal of Giant), so you'd really need to re-test on a recent version of 6.0 to be definitive. Kris --yrj/dFKFPuw6o+aM Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQFCk1RSWry0BWjoQKURAsz8AKCTTpQ+UwZTWNT2u97SqnVI2jFIiwCgkJKz vmDl/iHG06pZ49+m4Bt+fgc= =eIKH -----END PGP SIGNATURE----- --yrj/dFKFPuw6o+aM--
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