From mboxrd@z Thu Jan 1 00:00:00 1970 From: Loic Dachary Subject: arm64 qemu odd behavior Date: Sun, 3 Apr 2016 23:18:45 +0200 Message-ID: <570188B5.3090102@dachary.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from relay2-d.mail.gandi.net ([217.70.183.194]:43059 "EHLO relay2-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751347AbcDCVSu (ORCPT ); Sun, 3 Apr 2016 17:18:50 -0400 Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Martin Palma Cc: Ceph Development Hi Martin, In your quest to understand why the arm64 qemu sometimes hangs when usi= ng as many processors as the host, maybe this will help.=20 Today while watching an installation on an arm64 qemu machine, I notice= d it was stuck in setting up fontconfig. So I logged in the machine, CP= U was not busy, no IOwait either, a lot of free RAM. The host was also = mostly idle. I straced the process and saw it moving. Unfortunately ( o= r maybe I was the cause of things starting to move on again ?) the font= regeneration finished while I was observing and things seem to be goin= g at a normal speed now.=20 Note that there is almost a 2 hours gap between Setting up fontconfig a= nd Regenerating fonts cache. Maybe the pattern we're sometime seeing (i.e. all blocked, not even pos= sible to ssh) is another case of the same issue ? I'm starting to think we should bring this discussion to some arm64 mai= ling list or IRC channel but I don't know any. 2016-04-03 19:17:34,858.858 DEBUG:teuthology.misc:Setting up libgdk-pix= buf2.0-0:arm64 (2.30.7-0ubuntu1.2) ... 2016-04-03 19:17:35,057.057 DEBUG:teuthology.misc:Setting up libthai-da= ta (0.1.20-3) ... 2016-04-03 19:17:35,183.183 DEBUG:teuthology.misc:Setting up libdatrie1= :arm64 (0.2.8-1) ... 2016-04-03 19:17:35,350.350 DEBUG:teuthology.misc:Setting up libthai0:a= rm64 (0.1.20-3) ... 2016-04-03 19:17:35,546.546 DEBUG:teuthology.misc:Setting up fontconfig= (2.11.0-0ubuntu4.1) ... 2016-04-03 21:09:52,094.094 DEBUG:teuthology.misc:Regenerating fonts ca= che... done. 2016-04-03 21:09:52,136.136 DEBUG:teuthology.misc:Setting up libpango-1= =2E0-0:arm64 (1.36.3-1ubuntu1.1) ... 2016-04-03 21:09:52,303.303 DEBUG:teuthology.misc:Setting up libgraphit= e2-3:arm64 (1.3.6-1ubuntu0.14.04.1) ... 2016-04-03 21:09:52,465.465 DEBUG:teuthology.misc:Setting up libharfbuz= z0b:arm64 (0.9.27-1ubuntu1) ... 2016-04-03 21:09:52,641.641 DEBUG:teuthology.misc:Setting up libpangoft= 2-1.0-0:arm64 (1.36.3-1ubuntu1.1) ... 2016-04-03 21:09:52,806.806 DEBUG:teuthology.misc:Setting up libpangoca= iro-1.0-0:arm64 (1.36.3-1ubuntu1.1) ... 2016-04-03 21:09:52,971.971 DEBUG:teuthology.misc:Setting up libxcompos= ite1:arm64 (1:0.4.4-1) ... Cheers --=20 Lo=C3=AFc Dachary, Artisan Logiciel Libre -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html