Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752238AbaBJRCJ (ORCPT ); Mon, 10 Feb 2014 12:02:09 -0500 Received: from merlin.infradead.org ([205.233.59.134]:53119 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751770AbaBJRCG (ORCPT ); Mon, 10 Feb 2014 12:02:06 -0500 Date: Mon, 10 Feb 2014 18:01:44 +0100 From: Peter Zijlstra To: "Norton, Scott J" Cc: "Long, Wai Man" , "Low, Jason" , "mingo@redhat.com" , "paulmck@linux.vnet.ibm.com" , "torvalds@linux-foundation.org" , "tglx@linutronix.de" , "linux-kernel@vger.kernel.org" , "riel@redhat.com" , "akpm@linux-foundation.org" , "Bueso, Davidlohr" , "hpa@zytor.com" , "andi@firstfloor.org" , "Chandramouleeswaran, Aswin" , "Vinod, Chegu" Subject: Re: [RFC][PATCH v2 5/5] mutex: Give spinners a chance to spin_on_owner if need_resched() triggered while queued Message-ID: <20140210170144.GO9987@twins.programming.kicks-ass.net> References: <1390936396-3962-1-git-send-email-jason.low2@hp.com> <1390936396-3962-6-git-send-email-jason.low2@hp.com> <20140128210753.GJ11314@laptop.programming.kicks-ass.net> <1390949495.2807.52.camel@j-VirtualBox> <20140129115142.GE9636@twins.programming.kicks-ass.net> <52F2B0C2.8040408@hp.com> <20140206140435.GU8874@twins.programming.kicks-ass.net> <52F3D84D.5060309@hp.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Feb 06, 2014 at 08:10:02PM +0000, Norton, Scott J wrote: > > How do people run this AIM7 piece of shit? I let it run for over an hour > > and it generated exactly 0 numbers, it just sits there eating cpu-time > > and creating a racket from my pantry. > > ./reaim -s100 -e2000 -t -j100 -i100 -f workfile.high_systime > > The reaim.config file contains: > > FILESIZE 10k > POOLSIZE 1m > DISKDIR /t0 > DISKDIR /t1 > DISKDIR /t2 > DISKDIR /t3 > DISKDIR /t4 > DISKDIR /t5 > DISKDIR /t6 > DISKDIR /t7 > DISKDIR /t8 > DISKDIR /t9 > DISKDIR /t10 > DISKDIR /t11 > DISKDIR /t12 > DISKDIR /t13 > DISKDIR /t14 > DISKDIR /t15 > > The way Longman uses this is to create 16 ramdisk filesystems through > /dev/ram* and then mount those filesystems to the /t* directories. > Although you could run it through a regular filesystem also. It will use > whatever you place in the reaim.config file as DISKDIR. You can specify > one or more DISKDIR directories. OK, and we're back to creating a racket but not producing useful numbers; how long is that crap supposed to run before it gives a number? Surely it can produce a useful number after a few minutes of runtime.. Letting it run for hours is just a waste of time and money. Note that I'm running this on a WSM-EP with (2*6*2) 24 CPUs and 24G of ram. -- 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/