From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751409AbZHZPGW (ORCPT ); Wed, 26 Aug 2009 11:06:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751243AbZHZPGW (ORCPT ); Wed, 26 Aug 2009 11:06:22 -0400 Received: from mail-fx0-f217.google.com ([209.85.220.217]:49368 "EHLO mail-fx0-f217.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751161AbZHZPGV (ORCPT ); Wed, 26 Aug 2009 11:06:21 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=OcAEgQkKOEp1mCrQySpOUlefDFeD8ZuEfNp8a2NXKkYmyAUODfez9D7ZTHMPi2zTqO /SF88HKtNtkFO/v+cM6ORuZpn5Za819iqvr8JTBU/y61xCGc9EEBZizHaiRy8aiESEth awUymY3kf8h1GsiytEEho9tlvZdeULkex4uWY= MIME-Version: 1.0 In-Reply-To: <1251298443.4791.7.camel@raz> References: <1250983671.5688.21.camel@raz> <1251222993.7023.53.camel@marge.simson.net> <1251227322.7538.1172.camel@twins> <4A943A00.9080609@nortel.com> <1251264700.7538.1178.camel@twins> <1251282598.3514.20.camel@raz> <1251297910.1791.22.camel@maxim-laptop> <1251298443.4791.7.camel@raz> Date: Wed, 26 Aug 2009 18:06:21 +0300 X-Google-Sender-Auth: 4a4bac8d4668a8d1 Message-ID: <84144f020908260806pb85ee72r7b7e32a07b921b59@mail.gmail.com> Subject: Re: RFC: THE OFFLINE SCHEDULER From: Pekka Enberg To: raz ben yehuda Cc: Maxim Levitsky , Christoph Lameter , Peter Zijlstra , Chris Friesen , Mike Galbraith , riel@redhat.com, mingo@elte.hu, andrew motron , wiseman@macs.biu.ac.il, lkml , linux-rt-users@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Aug 26, 2009 at 5:54 PM, raz ben yehuda wrote: >> I have always been fascinated by the idea of controlling another cpu >> from the main CPU. >> >> Usually these cpus are custom, run proprietary software, and have no >> datasheet on their I/O interfaces. >> >> But, being able to turn an ordinary CPU into something like that seems >> to be very nice. >> >> For example, It might help with profiling. Think about a program that >> can run uninterrupted how much it wants. >> >> I might even be better, if the dedicated CPU would use a predefined >> reserved memory range (I wish there was a way to actually lock it to >> that range) >> >> On the other hand, I could see this as a jump platform for more >> proprietary code, something like that: we use linux in out server >> platform, but out "insert buzzword here" network stack pro+ can handle >> 100% more load that linux does, and it runs on a dedicated core.... >> >> In the other words, we might see 'firmwares' that take an entire cpu for >> their usage. > > This is exactly what offsched (sos) is. you got it. SOS was partly inspired by the notion of a GPU. So where are the patches? The URL in the original post returns 404...