From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sog-mx-2.v43.ch3.sourceforge.com ([172.29.43.192] helo=mx.sourceforge.net) by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1Zrge2-0007fa-HI for user-mode-linux-devel@lists.sourceforge.net; Thu, 29 Oct 2015 06:25:06 +0000 Received: from ivanoab4.miniserver.com ([78.31.104.92]) by sog-mx-2.v43.ch3.sourceforge.com with esmtps (TLSv1:AES128-SHA:128) (Exim 4.76) id 1Zrge1-0003DL-7S for user-mode-linux-devel@lists.sourceforge.net; Thu, 29 Oct 2015 06:25:06 +0000 Message-ID: <5631BB4E.4010301@kot-begemot.co.uk> Date: Thu, 29 Oct 2015 06:23:10 +0000 From: Anton Ivanov MIME-Version: 1.0 References: <1445416947-824802-1-git-send-email-aivanov@brocade.com> <562D236E.7020108@kot-begemot.co.uk> <562DFC90.9030308@nod.at> In-Reply-To: <562DFC90.9030308@nod.at> List-Id: The user-mode Linux development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: user-mode-linux-devel-bounces@lists.sourceforge.net Subject: Re: [uml-devel] [PATCH v3] um: Switch clocksource to hrtimers To: Richard Weinberger , user-mode-linux-devel@lists.sourceforge.net I got the first patchset to build, it works very well on a single core host or with CPU pinning of the UML - the performance gain is > 25%. However, I introduced a race somewhere along the way - it crashes UML reliably if you do not pin CPUs. I will debug it, fix it and submit. I am guessing a week or so. IMHO 25% is worth it :) A. On 26/10/15 10:12, Richard Weinberger wrote: > Hi! > > Am 25.10.2015 um 19:46 schrieb Anton Ivanov: >> Hi List, hi Richard, >> >> I am going to sort out the UBD patchset next as that has no dependencies on timer and the other stuff which is waiting in the queue behind the timers. >> >> That should give UML a significant boost. It is nothing particularly revolutionary (qemu has been using some of that for ages). >> >> I should be able to get these out of the door early on this week. > Nice! > >> A. >> >> P.S. If there is anything to fix on the timer one, please shout. > Looks good so far. Unless it breaks a lot it will be part of the 4.4 merge window. :) > > Thanks, > //richard > ------------------------------------------------------------------------------ _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel