From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lists.gentoo.org ([140.105.134.102] helo=robin.gentoo.org) by nuthatch.gentoo.org with esmtp (Exim 4.62) (envelope-from ) id 1HzryY-0007pP-Ns for garchives@archives.gentoo.org; Sun, 17 Jun 2007 10:27:19 +0000 Received: from robin.gentoo.org (localhost [127.0.0.1]) by robin.gentoo.org (8.14.0/8.14.0) with SMTP id l5HAPXsG005300; Sun, 17 Jun 2007 10:25:33 GMT Received: from smtp.nildram.co.uk (smtp.nildram.co.uk [195.149.33.74]) by robin.gentoo.org (8.14.0/8.14.0) with ESMTP id l5HAPW3t005295 for ; Sun, 17 Jun 2007 10:25:33 GMT Received: from wstn.prhnet (prh.gotadsl.co.uk [81.6.251.123]) by smtp.nildram.co.uk (Postfix) with ESMTP id 0C0BC55F23 for ; Sun, 17 Jun 2007 11:25:31 +0100 (BST) From: Peter Humphrey Organization: at home To: gentoo-amd64@lists.gentoo.org Subject: Re: [gentoo-amd64] PORTAGE_NICENESS Date: Sun, 17 Jun 2007 10:41:29 +0100 User-Agent: KMail/1.9.7 References: <5bdc1c8b0706141044p41426bd9p761bc3148f9aee93@mail.gmail.com> <200706141957.13345.volker.armin.hemmann@tu-clausthal.de> In-Reply-To: <200706141957.13345.volker.armin.hemmann@tu-clausthal.de> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-amd64@gentoo.org Reply-to: gentoo-amd64@lists.gentoo.org MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200706171041.29404.prh@gotadsl.co.uk> X-Archives-Salt: 83326808-96a3-42d6-abb0-b284e5b2275e X-Archives-Hash: 64ec500577d91f85405498ab3737991e On Thursday 14 June 2007 18:57:13 Hemmann, Volker Armin wrote: > read /usr/src/linux/Documentation/sched-desing.txt "design", not "desing" :-) > quote: > - batch scheduling. A significant proportion of computing-intensive tasks > benefit from batch-scheduling, where timeslices are long and processes > are roundrobin scheduled. The new scheduler does such batch-scheduling > of the lowest priority tasks - so nice +19 jobs will get > 'batch-scheduled' automatically. With this scheduler, nice +19 jobs > are in essence SCHED_IDLE, from an interactiveness point of view. That's an interesting description - thanks for the pointer. The kernel includes three schedulers: anticipatory, deadline and (the default) CFQ, whereas the author refers only to "old" and "new" schedulers. I wonder which of the features he describes are common to all three. I also wonder which kernel version introduced the "new" scheduler. I have a reason for this interest, which I intend to describe in a separate thread. -- Rgds Peter Humphrey Linux Counter 5290, Aug 93 -- gentoo-amd64@gentoo.org mailing list