Date: Fri, 25 Jun 1999 18:06:17 +0200 From: "Jose M. Alcaide" <jose@we.lc.ehu.es> To: Thomas Schuerger <schuerge@wjpserver.CS.Uni-SB.DE> Cc: sheldonh@FreeBSD.ORG, schuerge@cs.uni-sb.de, freebsd-bugs@FreeBSD.ORG Subject: Re: kern/12381: Bad scheduling in FreeBSD Message-ID: <3773A8F9.61FD6998@we.lc.ehu.es> References: <199906251520.RAA20043@wjpserver.cs.uni-sb.de>
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Thomas Schuerger wrote: > > > Here we are using several FreeBSD systems for running CPU-intensive > > processes (now including some "setiathome's" ;-) ). All these processes > > 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 memory > > hog has a noticeable impact on performance (due to paging and swapping). > > 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. > 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 ----------------------------------------------------------------------- José Mª Alcaide | mailto:jose@we.lc.ehu.es Universidad del País Vasco | mailto:jmas@es.FreeBSD.ORG Dpto. de Electricidad y Electrónica | 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
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