From owner-freebsd-hackers Fri Oct 25 13:23:15 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id NAA12326 for hackers-outgoing; Fri, 25 Oct 1996 13:23:15 -0700 (PDT) Received: from who.cdrom.com (who.cdrom.com [204.216.27.3]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id NAA12309 for ; Fri, 25 Oct 1996 13:23:11 -0700 (PDT) Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by who.cdrom.com (8.7.5/8.6.11) with SMTP id NAA17002 for ; Fri, 25 Oct 1996 13:23:03 -0700 (PDT) Received: from sax.sax.de (sax.sax.de [193.175.26.33]) by irz301.inf.tu-dresden.de (8.6.12/8.6.12-s1) with ESMTP id WAA20946; Fri, 25 Oct 1996 22:21:12 +0200 Received: (from uucp@localhost) by sax.sax.de (8.6.12/8.6.12-s1) with UUCP id WAA21262; Fri, 25 Oct 1996 22:21:11 +0200 Received: (from j@localhost) by uriah.heep.sax.de (8.7.6/8.6.9) id VAA09631; Fri, 25 Oct 1996 21:54:51 +0200 (MET DST) From: J Wunsch Message-Id: <199610251954.VAA09631@uriah.heep.sax.de> Subject: Re: Priorities? To: freebsd-hackers@freebsd.org (FreeBSD hackers) Date: Fri, 25 Oct 1996 21:54:51 +0200 (MET DST) Cc: csubl@csv.warwick.ac.uk Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) In-Reply-To: <199610251533.KAA02790@dyson.iquest.net> from "John S. Dyson" at "Oct 25, 96 10:33:58 am" X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E X-Mailer: ELM [version 2.4ME+ PL17 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk As John S. Dyson wrote: > The rtprio priorities are "hard" and processes running at rtprio > are not swapped and always run before normal processes. "Nice" > priorities only bias the scheduler. Addendum (since the original question included this): `idleprio' processes are being scheduled only if absolutely no other processes are runnable, and the system would otherwise enter the idle loop. Thus, they are good e.g. for X11 screen savers. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)