From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760190Ab3BHPm1 (ORCPT ); Fri, 8 Feb 2013 10:42:27 -0500 Received: from caramon.arm.linux.org.uk ([78.32.30.218]:38404 "EHLO caramon.arm.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760132Ab3BHPm0 (ORCPT ); Fri, 8 Feb 2013 10:42:26 -0500 Date: Fri, 8 Feb 2013 15:41:13 +0000 From: Russell King - ARM Linux To: "Srivatsa S. Bhat" Cc: Rusty Russell , tglx@linutronix.de, peterz@infradead.org, tj@kernel.org, oleg@redhat.com, paulmck@linux.vnet.ibm.com, mingo@kernel.org, linux-arch@vger.kernel.org, nikunj@linux.vnet.ibm.com, linux-pm@vger.kernel.org, fweisbec@gmail.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, rostedt@goodmis.org, xiaoguangrong@linux.vnet.ibm.com, rjw@sisk.pl, sbw@mit.edu, wangyun@linux.vnet.ibm.com, netdev@vger.kernel.org, namhyung@kernel.org, akpm@linux-foundation.org, walken@google.com, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug Message-ID: <20130208154113.GV17833@n2100.arm.linux.org.uk> References: <20130122073210.13822.50434.stgit@srivatsabhat.in.ibm.com> <510FBC01.2030405@linux.vnet.ibm.com> <87haloiwv0.fsf@rustcorp.com.au> <51134596.4080106@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <51134596.4080106@linux.vnet.ibm.com> User-Agent: Mutt/1.5.19 (2009-01-05) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Feb 07, 2013 at 11:41:34AM +0530, Srivatsa S. Bhat wrote: > On 02/07/2013 09:44 AM, Rusty Russell wrote: > > "Srivatsa S. Bhat" writes: > >> On 01/22/2013 01:03 PM, Srivatsa S. Bhat wrote: > >> Avg. latency of 1 CPU offline (ms) [stop-cpu/stop-m/c latency] > >> > >> # online CPUs Mainline (with stop-m/c) This patchset (no stop-m/c) > >> > >> 8 17.04 7.73 > >> > >> 16 18.05 6.44 > >> > >> 32 17.31 7.39 > >> > >> 64 32.40 9.28 > >> > >> 128 98.23 7.35 > > > > Nice! > > Thank you :-) > > > I wonder how the ARM guys feel with their quad-cpu systems... > > > > That would be definitely interesting to know :-) That depends what exactly you'd like tested (and how) and whether you'd like it to be a test-chip based quad core, or an OMAP dual-core SoC. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from caramon.arm.linux.org.uk (caramon.arm.linux.org.uk [IPv6:2002:4e20:1eda::1]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 1CDAD2C0085 for ; Sat, 9 Feb 2013 02:42:53 +1100 (EST) Date: Fri, 8 Feb 2013 15:41:13 +0000 From: Russell King - ARM Linux To: "Srivatsa S. Bhat" Subject: Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug Message-ID: <20130208154113.GV17833@n2100.arm.linux.org.uk> References: <20130122073210.13822.50434.stgit@srivatsabhat.in.ibm.com> <510FBC01.2030405@linux.vnet.ibm.com> <87haloiwv0.fsf@rustcorp.com.au> <51134596.4080106@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <51134596.4080106@linux.vnet.ibm.com> Sender: Russell King - ARM Linux Cc: linux-doc@vger.kernel.org, peterz@infradead.org, fweisbec@gmail.com, linux-kernel@vger.kernel.org, walken@google.com, mingo@kernel.org, linux-arch@vger.kernel.org, xiaoguangrong@linux.vnet.ibm.com, wangyun@linux.vnet.ibm.com, paulmck@linux.vnet.ibm.com, nikunj@linux.vnet.ibm.com, linux-pm@vger.kernel.org, Rusty Russell , rostedt@goodmis.org, rjw@sisk.pl, namhyung@kernel.org, tglx@linutronix.de, linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org, oleg@redhat.com, sbw@mit.edu, tj@kernel.org, akpm@linux-foundation.org, linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Thu, Feb 07, 2013 at 11:41:34AM +0530, Srivatsa S. Bhat wrote: > On 02/07/2013 09:44 AM, Rusty Russell wrote: > > "Srivatsa S. Bhat" writes: > >> On 01/22/2013 01:03 PM, Srivatsa S. Bhat wrote: > >> Avg. latency of 1 CPU offline (ms) [stop-cpu/stop-m/c latency] > >> > >> # online CPUs Mainline (with stop-m/c) This patchset (no stop-m/c) > >> > >> 8 17.04 7.73 > >> > >> 16 18.05 6.44 > >> > >> 32 17.31 7.39 > >> > >> 64 32.40 9.28 > >> > >> 128 98.23 7.35 > > > > Nice! > > Thank you :-) > > > I wonder how the ARM guys feel with their quad-cpu systems... > > > > That would be definitely interesting to know :-) That depends what exactly you'd like tested (and how) and whether you'd like it to be a test-chip based quad core, or an OMAP dual-core SoC. From mboxrd@z Thu Jan 1 00:00:00 1970 From: linux@arm.linux.org.uk (Russell King - ARM Linux) Date: Fri, 8 Feb 2013 15:41:13 +0000 Subject: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug In-Reply-To: <51134596.4080106@linux.vnet.ibm.com> References: <20130122073210.13822.50434.stgit@srivatsabhat.in.ibm.com> <510FBC01.2030405@linux.vnet.ibm.com> <87haloiwv0.fsf@rustcorp.com.au> <51134596.4080106@linux.vnet.ibm.com> Message-ID: <20130208154113.GV17833@n2100.arm.linux.org.uk> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu, Feb 07, 2013 at 11:41:34AM +0530, Srivatsa S. Bhat wrote: > On 02/07/2013 09:44 AM, Rusty Russell wrote: > > "Srivatsa S. Bhat" writes: > >> On 01/22/2013 01:03 PM, Srivatsa S. Bhat wrote: > >> Avg. latency of 1 CPU offline (ms) [stop-cpu/stop-m/c latency] > >> > >> # online CPUs Mainline (with stop-m/c) This patchset (no stop-m/c) > >> > >> 8 17.04 7.73 > >> > >> 16 18.05 6.44 > >> > >> 32 17.31 7.39 > >> > >> 64 32.40 9.28 > >> > >> 128 98.23 7.35 > > > > Nice! > > Thank you :-) > > > I wonder how the ARM guys feel with their quad-cpu systems... > > > > That would be definitely interesting to know :-) That depends what exactly you'd like tested (and how) and whether you'd like it to be a test-chip based quad core, or an OMAP dual-core SoC.