From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Maloney Subject: Re: 4.1.2 very slow without upstream patches, but fast with them, also 4.2 very slow Date: Tue, 07 Aug 2012 09:25:18 +0200 Message-ID: <5020C2DE.304@brockmann-consult.de> References: <501F98A1.4070806@brockmann-consult.de> <501FB9060200007800092D4E@nat28.tlf.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <501FB9060200007800092D4E@nat28.tlf.novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org > That still won't tell us which patches you did apply. I applied no patches and tested, and the result was slow. And then applied all patches, and it was fast. I didn't try figuring out which one it was. So I guess I'll try: - the latest unstable 4.2 - the 4.1.3-rc (Which includes the patch Malcolm suggested) - and my rpm source with half patches, 3/4 of them, etc. binary search style to see which patch(es) changed the performance. But this means I won't be able to narrow it down to a single patch, but only the point in the long list where the most dramatic change happens, possibly depending on many previous patches. Thanks so far, guys. On 08/06/2012 12:31 PM, Jan Beulich wrote: >>>> On 06.08.12 at 12:12, Peter Maloney wrote: >> my AMD FX-8150 system with vanilla source code is super slow, both the >> dom0 and domUs. However, after I merge the upstream patches I found in >> the openSUSE rpm, it runs normally. > I'd be very surprised if you really just took the upstream patches, > and the result was better than 4.2-rc1. After all, what upstream > means is that they were taken from -unstable. > >> I tried 4.2-unstable and it was the same. There was no rc1 when I tested >> it about 1.5 weeks ago. And 4.2 has the same horrible performance, and >> obviously those patches won't work any more since the 4.2 code looks >> completely reorganized, so I'm stuck with 4.1.2 > Obviously the upstream patches can't be applied to something > that already has all those changes. Other patches, of which we > unfortunately have quite a few, would be a different story. > >> Here is the rpm I was using at the time: >> http://download.opensuse.org/update/12.1/src/xen-4.1.2_16-1.7.1.src.rpm >> >> To see the list of the patches and what order to apply them, see the >> spec file. > That still won't tell us which patches you did apply. > >> Please make sure this performance issue is fixed for the 4.2 release. >> And I would be happy to test whatever files you send me. > The sort of report you're doing isn't that helpful. What would > help is if you could narrow down which patch(es) it is that > make things so much better. Giving 4.1.3-rc a try might also > be worthwhile, albeit I would hope we don't have a regression > in 4.2.0-rc compared to 4.1.3-rc... > > Jan > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xen.org > http://lists.xen.org/xen-devel -- -------------------------------------------- Peter Maloney Brockmann Consult Max-Planck-Str. 2 21502 Geesthacht Germany Tel: +49 4152 889 300 Fax: +49 4152 889 333 E-mail: peter.maloney@brockmann-consult.de Internet: http://www.brockmann-consult.de --------------------------------------------