From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33296) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b4pQX-0002Vi-SP for qemu-devel@nongnu.org; Mon, 23 May 2016 08:57:47 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1b4pQT-0005xW-P5 for qemu-devel@nongnu.org; Mon, 23 May 2016 08:57:44 -0400 Received: from lhrrgout.huawei.com ([194.213.3.17]:2434) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b4pQT-0005xL-Fj for qemu-devel@nongnu.org; Mon, 23 May 2016 08:57:41 -0400 References: <87a8jhdotl.fsf@linaro.org> <878tz1djph.fsf@linaro.org> From: Claudio Fontana Message-ID: <5742FE28.3020601@huawei.com> Date: Mon, 23 May 2016 14:57:12 +0200 MIME-Version: 1.0 In-Reply-To: <878tz1djph.fsf@linaro.org> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Subject: Re: [Qemu-devel] Any topics for today's MTTCG sync-up call? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: =?UTF-8?Q?Alex_Benn=c3=a9e?= , alvise rigo Cc: MTTCG Devel , Mark Burton , QEMU Developers , "Emilio G. Cota" , Paolo Bonzini , Sergey Fedorov , Pranith Kumar , =?UTF-8?B?S09OUkFEIEZyw6lkw6lyaWM=?= On 23.05.2016 14:47, Alex Bennée wrote: > > alvise rigo writes: > >> Hi Alex, >> >> I finally solved the issue I had, the branch is working well as far as I >> can say. >> The work I will share, in addition to making the LL/SC work mttcg-aware, >> extends the various TLB flushes calls with the query-based mechanism: the >> requesting CPU queries the flushes to the target CPUs and wait them for >> completion. >> >> Sorry for the delay, I have been quite busy. I just need to polish some >> commits, than (this week) I will share the branch. > > Thanks for the update. It sounds like we don't need to add to that on > the call. > > Anyone else have something they want to discuss? Hi, at some point in the past there was a set of performance benchmarks which were showing the improvements using mttcg, is there some update on that? Thanks, Claudio > >> >> Best regards, >> alvise >> >> On Mon, May 23, 2016 at 12:57 PM, Alex Bennée >> wrote: >> >>> Hi, >>> >>> It's been a while since the last sync-up call. Have we got any topics to >>> discuss today? >>> >>> Sergey and I (with a little Paolo) have spent some of last week delving >>> into the locking hierarchy w.r.t to tb_lock vs mmap_lock to see if there >>> is any simplification to be had. I'm not sure if this is a topic >>> conducive to a phone call instead of the mailing list but if others want >>> to discuss it we can add it as an agenda item. >>> >>> We also have a new member of the team. Pranith has joined as a GSoC >>> student. He'll be looking at memory ordering with his first pass at the >>> problem looking to solve the store-after-load issues which do show up on >>> ARM-on-x86 (see my testcase). >>> >>> Alvise, is there any help you need with the LL/SC stuff? The MTTCG aware >>> version has been taking some time so would it be worth sharing the >>> issues you have hit with the group? >>> >>> Emilio, is there anything you want to add? I've been following the QHT >>> stuff which is a really positive addition which my v3 base patches is >>> based upon (making the hot-path non lock contended). Do you have >>> anything in the works above that? >>> >>> Cheers, >>> >>> -- >>> Alex Bennée >>> > > > -- > Alex Bennée >