From mboxrd@z Thu Jan 1 00:00:00 1970 From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=) Subject: Re: Speed of qemu VM sharing the store Date: Sat, 11 Nov 2017 14:45:05 +0100 Message-ID: <87a7zthqu6.fsf@gnu.org> References: <87po8phx0d.fsf@gnu.org> <7724320c-51c8-94d5-e676-1f749b87ff04@crazy-compilers.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Return-path: Received: from eggs.gnu.org ([2001:4830:134:3::10]:56643) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eDW5v-0000vi-Le for guix-devel@gnu.org; Sat, 11 Nov 2017 08:45:12 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eDW5u-0003tI-N3 for guix-devel@gnu.org; Sat, 11 Nov 2017 08:45:11 -0500 Received: from hera.aquilenet.fr ([2a01:474::1]:43158) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eDW5u-0003qj-Fq for guix-devel@gnu.org; Sat, 11 Nov 2017 08:45:10 -0500 In-Reply-To: <7724320c-51c8-94d5-e676-1f749b87ff04@crazy-compilers.com> (Hartmut Goebel's message of "Sat, 11 Nov 2017 14:05:11 +0100") List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org Sender: "Guix-devel" To: Hartmut Goebel Cc: guix-devel Hartmut Goebel skribis: > Am 11.11.2017 um 12:31 schrieb Ludovic Court=C3=A8s: >>> Since a vm (sharing the host store) is unacceptable sloooooow, >> Could you be more specific? I understand from Chris Baines=E2=80=99 mea= surement >> some time ago that it=E2=80=99s definitely slower than a bare-metal syst= em, but >> I don=E2=80=99t find it =E2=80=9Cunacceptably slow=E2=80=9D when it come= s to testing stuff like >> this (it=E2=80=99s definitely faster than building a standalone image wi= th =E2=80=98guix >> system vm-image=E2=80=99 anyway!). >> > See my posting at > : > > When sharing the host's store ("guix system vm =E2=80=A6"), Plasma takes = 80 > seconds (minimum) to start up after log-in to X11, when clicking the > menu-button, it takes 36 sec. for the menu to appear. This plain renders > such a VM unusable even for testing. OK, that=E2=80=99s terrible indeed. So that=E2=80=99s with =E2=80=98-enabl= e-kvm=E2=80=99 on the qemu command line, right? > YMMV, but I call this in-acceptable and this is why I'm using a vm-image > ("guix system vm-image =E2=80=A6", which is much faster: Plase start-up 2= 5 sec., > Menu appears immediately. 25 seconds to start up is still a lot (in =E2=80=98guix system vm=E2=80=99 = GNOME is usable and much faster to start). It would be nice to see if that comes from I/O or something else. Is there something we=E2=80=99re doing wrong (independently of the VM) or is it expected for Plasma startup to be this slow? Ludo=E2=80=99.