Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753157AbbH3AVQ (ORCPT ); Sat, 29 Aug 2015 20:21:16 -0400 Received: from blu004-omc1s4.hotmail.com ([65.55.116.15]:53180 "EHLO BLU004-OMC1S4.hotmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752909AbbH3AVP (ORCPT ); Sat, 29 Aug 2015 20:21:15 -0400 X-TMN: [GRJ9Ks5G//3Ws5NBF6AiuoBaaRYoJlfG] X-Originating-Email: [wanpeng.li@hotmail.com] Message-ID: Subject: Re: [PATCH v4 0/3] KVM: Dynamic Halt-Polling To: Peter Kieser References: <55E221B2.3000702@kieser.ca> <55E23183.3050806@kieser.ca> <55E24A93.3070606@kieser.ca> CC: Paolo Bonzini , David Matlack , kvm , "linux-kernel@vger.kernel.org" From: Wanpeng Li Date: Sun, 30 Aug 2015 08:21:06 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 In-Reply-To: <55E24A93.3070606@kieser.ca> Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 30 Aug 2015 00:21:13.0213 (UTC) FILETIME=[C72C22D0:01D0E2B9] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1262 Lines: 38 On 8/30/15 8:13 AM, Peter Kieser wrote: > On 2015-08-29 4:55 PM, Wanpeng Li wrote: >> On 8/30/15 6:26 AM, Peter Kieser wrote: >>> Thanks, Wanpeng. Applied this to Linux 3.18 and seeing much higher >>> CPU usage (200%) for qemu 2.4.0 process on a Windows 10 x64 guest. >>> qemu parameters: >> >> Thanks for the report. If Paolo's patch "kvm: add halt_poll_ns module >> parameter" is applied on your 3.18? Btw, do you test the linux guest? > > No high CPU usage on Linux guests. What's the difference w/ and w/o the patchset? > Following patch series are applied (in order): > > * kvm: add halt_poll_ns module parameter > * KVM: make halt_poll_ns static > * KVM: Dynamic Halt-Polling v4 > I will find a windows 10 x64 guest to figure out what happens tomorrow. Do you test other windows guest(like win7)? Btw, could you test v3 dynamic halt-polling(against windows 10 guest) which David gives the shrink/grow logic different with v4. Many thanks for your time, Peter! ;-) Regards, Wanepng Li > -Peter > > -- 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/