Date: Thu, 10 Mar 2005 21:40:04 +0000 (GMT) From: Robert Watson <rwatson@FreeBSD.org> To: ISP Informatique <mlh@ispinfo.fr> Cc: freebsd-performance@freebsd.org Subject: Re: FreeBSD 5.3 et multiprocessor Message-ID: <Pine.NEB.3.96L.1050310213838.68432a-100000@fledge.watson.org> In-Reply-To: <422ECAF7.4050407@ispinfo.fr>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, 9 Mar 2005, ISP Informatique wrote: > Hello, I recently have just passed a server of FreeBSD 4.2 to FreeBSD > 5.3. The nasty surprise being which I note a notable reduction in the > performances. The machine is a HP LT6000r, quadri Xeon 700 with 2Go of > RAM. >=20 > The results are appreciably the same ones with a kernel including or not > "options SMP". Could you tell us a bit more about what kind of performance difference you're seeing? Specifically, what sort of workload? There are a lot of changes between 4.x and 5.x -- SMP model changes, threading changes, file system changes, device driver changes, etc. Trying to figure out what's going on will require narrowing down a bit what the variables are. Thanks, Robert N M Watson >=20 > Did I miss some thing? or perhaps did this already arrive at others?=20 > In particular, I has just crossed this in > http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-co= nfig.html=20 >=20 >=20 > > > > options SCHED_4BSD # 4BSD scheduler > > =20 > > > > The traditional scheduler for FreeBSD. Depending on your system's=20 > > workload, you may gain performance by using the new ULE scheduler for= =20 > > FreeBSD that has been designed specially for SMP, but works just fine= =20 > > on UP systems too. If you wish to try it out, replace SCHED_4BSD with= =20 > > SCHED_ULE in your configuration file. >=20 > Did you already test?=20 >=20 > By advance, thank you, >=20 > --=20 > Hubert Adgi=E9 >=20 > ISP Informatique > www.ispinfo.fr > 0890 710 147 >=20 >=20 > _______________________________________________ > freebsd-performance@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-performance > To unsubscribe, send any mail to "freebsd-performance-unsubscribe@freebsd= =2Eorg" >=20
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.NEB.3.96L.1050310213838.68432a-100000>