From mboxrd@z Thu Jan 1 00:00:00 1970 From: Russell King - ARM Linux Subject: Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug Date: Fri, 8 Feb 2013 15:41:13 +0000 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 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 To: "Srivatsa S. Bhat" Return-path: Content-Disposition: inline In-Reply-To: <51134596.4080106@linux.vnet.ibm.com> Sender: linux-arch-owner@vger.kernel.org List-Id: netdev.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.