From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mario Smarduch Subject: Re: [RFT - PATCH v2 0/2] KVM/arm64: add fp/simd lazy switch support Date: Mon, 05 Oct 2015 09:14:57 -0700 Message-ID: <5612A201.6030500@samsung.com> References: <1442964843-11953-1-git-send-email-m.smarduch@samsung.com> <20151005154540.GJ9011@cbox> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Cc: kvmarm@lists.cs.columbia.edu, marc.zyngier@arm.com, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org To: Christoffer Dall Return-path: Received: from mailout1.w2.samsung.com ([211.189.100.11]:17150 "EHLO usmailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751512AbbJEQPA (ORCPT ); Mon, 5 Oct 2015 12:15:00 -0400 Received: from uscpsbgex4.samsung.com (u125.gpu85.samsung.co.kr [203.254.195.125]) by mailout1.w2.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTP id <0NVR005TW94Y8X40@mailout1.w2.samsung.com> for kvm@vger.kernel.org; Mon, 05 Oct 2015 12:14:58 -0400 (EDT) In-reply-to: <20151005154540.GJ9011@cbox> Sender: kvm-owner@vger.kernel.org List-ID: Hi Christoffer, I just managed to boot qemu arm32 up on arm64 (last Fri - thanks for the tip - there were few other issue to clean up), so let me retest it again. Also I noticed some refactoring would help both 32 and 64 bit patches. Yes I could provide a the user space tests as well. Thanks- - Mario On 10/5/2015 8:45 AM, Christoffer Dall wrote: > On Tue, Sep 22, 2015 at 04:34:01PM -0700, Mario Smarduch wrote: >> This is a 2nd itteration for arm64, v1 patches were posted by mistake from an >> older branch which included several bugs. Hopefully didn't waste too much of >> anyones time. >> >> This patch series is a followup to the armv7 fp/simd lazy switch >> implementation, uses similar approach and depends on the series - see >> https://lists.cs.columbia.edu/pipermail/kvmarm/2015-September/016516.html >> >> It's based on earlier arm64 fp/simd optimization work - see >> https://lists.cs.columbia.edu/pipermail/kvmarm/2015-July/015748.html >> >> And subsequent fixes by Marc and Christoffer at KVM Forum hackathon to handle >> 32-bit guest on 64 bit host (and may require more here) - see >> https://lists.cs.columbia.edu/pipermail/kvmarm/2015-August/016128.html >> >> This series has be tested with arm64 on arm64 with several FP applications >> running on host and guest, with substantial decrease on number of >> fp/simd context switches. From about 30% down to 2% with one guest running. >> >> At this time I don't have arm32/arm64 working and hoping Christoffer and/or >> Marc (or anyone) can test 32-bit guest/64-bit host. >> > Did you already have some test infrastructure/applications that I can > reuse for this purpose or do I have to write userspace software? > > -Christoffer >