Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750842AbWB0JKr (ORCPT ); Mon, 27 Feb 2006 04:10:47 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751706AbWB0JKr (ORCPT ); Mon, 27 Feb 2006 04:10:47 -0500 Received: from smtp102.mail.mud.yahoo.com ([209.191.85.212]:19060 "HELO smtp102.mail.mud.yahoo.com") by vger.kernel.org with SMTP id S1750867AbWB0JKq (ORCPT ); Mon, 27 Feb 2006 04:10:46 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com.au; h=Received:Message-ID:Date:From:User-Agent:X-Accept-Language:MIME-Version:To:CC:Subject:References:In-Reply-To:Content-Type:Content-Transfer-Encoding; b=fHt5djqvTLEADFEfCwWPCRUOUmLCw2nPP7VxF6y/ZdgS2AUONLiCvBfR7U6UEtIo4T7covB5BTuT8X43UpaooKOddzKlBeqsSjNJKdOa/zeF6QNu/6SspnOv/VwYkGoKzWs5WwK+h3JuhjIh9WHM1YwductOl9LNcQ+mpPobJ6A= ; Message-ID: <4402C217.3070401@yahoo.com.au> Date: Mon, 27 Feb 2006 20:10:47 +1100 From: Nick Piggin User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.12) Gecko/20051007 Debian/1.7.12-1 X-Accept-Language: en MIME-Version: 1.0 To: nagar@watson.ibm.com CC: linux-kernel , lse-tech Subject: Re: [Patch 0/7] Per-task delay accounting References: <1141026996.5785.38.camel@elinux04.optonline.net> In-Reply-To: <1141026996.5785.38.camel@elinux04.optonline.net> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1115 Lines: 25 Shailabh Nagar wrote: > The following patches add accounting for the delays seen by tasks in > a) waiting for a CPU (while being runnable) > b) completion of synchronous block I/O initiated by the task > c) swapping in pages (i.e. capacity misses). > > Such delays provide feedback for a task's cpu priority, io priority and > rss limit values. Long delays, especially relative to other tasks, can > be a trigger for changing a task's cpu/io priorities and modifying its > rss usage (either directly through sys_getprlimit() that was proposed > earlier on lkml or by throttling cpu consumption or process calling > sys_setrlimit etc.) > Can we get an idea about the actual userspace programs and algorithms that use this feedback? Links, performance numbers, etc. -- SUSE Labs, Novell Inc. Send instant messages to your online friends http://au.messenger.yahoo.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/