From owner-freebsd-bugs Fri Jun 25 10:50: 7 1999 Delivered-To: freebsd-bugs@freebsd.org Received: from freefall.freebsd.org (freefall.FreeBSD.ORG [204.216.27.21]) by hub.freebsd.org (Postfix) with ESMTP id A2FA915011 for ; Fri, 25 Jun 1999 10:50:02 -0700 (PDT) (envelope-from gnats@FreeBSD.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.9.3/8.9.2) id KAA30061; Fri, 25 Jun 1999 10:50:02 -0700 (PDT) (envelope-from gnats@FreeBSD.org) Date: Fri, 25 Jun 1999 10:50:02 -0700 (PDT) Message-Id: <199906251750.KAA30061@freefall.freebsd.org> To: freebsd-bugs@FreeBSD.org Cc: From: "Jose M. Alcaide" Subject: Re: kern/12381: Bad scheduling in FreeBSD Reply-To: "Jose M. Alcaide" Sender: owner-freebsd-bugs@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org The following reply was made to PR kern/12381; it has been noted by GNATS. From: "Jose M. Alcaide" To: Thomas Schuerger Cc: sheldonh@FreeBSD.ORG, schuerge@cs.uni-sb.de, freebsd-bugs@FreeBSD.ORG Subject: Re: kern/12381: Bad scheduling in FreeBSD Date: Fri, 25 Jun 1999 18:06:17 +0200 Thomas Schuerger wrote: >=20 > > Here we are using several FreeBSD systems for running CPU-intensive > > processes (now including some "setiathome's" ;-) ). All these process= es > > run with nice 20, and their impact in general system performance is > > very low. In other words, we are not experiencing that performance > > degradation. Of course, a process which is CPU-bound and also a memor= y > > hog has a noticeable impact on performance (due to paging and swappin= g). >=20 > Well, please do a test that transfers heavily over the network or > that does a lot of disk I/O, once when setathome is running and once > when it's not. Heavy disk I/O will also be slower, try updating your > ports or your source tree via cvsup and measure times to do so. >=20 I tried a ftp (1.7 MB): With system idle: 1755377 bytes received in 1.97 seconds (872.12 KB/s) With setiathome running with nice 20: 1755377 bytes received in 1.84 seconds (930.99 KB/s) (Obviously the difference comes from the network load). And also a "tar xzf ports.tar.gz": With system idle: real 5m31.084s user 0m3.413s sys 0m21.317s With setiathome running with nice 20: real 5m59.629s user 0m4.163s sys 0m24.460s I did the tests using FreeBSD 3.2-RELEASE, running on a PentiumII-350, with an UltraDMA disk (using 0xa0ff flags and softupdates), and an Intel Etherexpress Pro/100 network card. -- JMA ----------------------------------------------------------------------- Jos=E9 M=AA Alcaide | mailto:jose@we.lc.ehu.es Universidad del Pa=EDs Vasco | mailto:jmas@es.FreeBSD.ORG Dpto. de Electricidad y Electr=F3nica | http://www.we.lc.ehu.es/~jose Facultad de Ciencias - Campus de Lejona | Tel.: +34-946012479 48940 Lejona (Vizcaya) - SPAIN | Fax: +34-946013071 ----------------------------------------------------------------------- "Go ahead... make my day." - H. Callahan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message