From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58979) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZKSrn-0001Dm-QU for qemu-devel@nongnu.org; Wed, 29 Jul 2015 11:02:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZKSrm-00009n-OD for qemu-devel@nongnu.org; Wed, 29 Jul 2015 11:01:59 -0400 Received: from hall.aurel32.net ([2001:bc8:30d7:100::1]:58591) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZKSrm-00008X-IY for qemu-devel@nongnu.org; Wed, 29 Jul 2015 11:01:58 -0400 Date: Wed, 29 Jul 2015 17:01:47 +0200 From: Aurelien Jarno Message-ID: <20150729150147.GO11361@aurel32.net> References: <55B734A7.8040108@gmx.net> <55B870A9.4090008@gmx.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable In-Reply-To: <55B870A9.4090008@gmx.net> Subject: Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Dennis Luehring Cc: qemu-devel , Artyom Tarasenko On 2015-07-29 08:20, Dennis Luehring wrote: > Am 28.07.2015 um 11:54 schrieb Artyom Tarasenko: > >>>anything i can do to speedup the emulation? > >Maybe try the fresh tcg optimizer improvements from Aurelien: > >https://lists.gnu.org/archive/html/qemu-devel/2015-07/msg05133.html >=20 > it don't seems to target sparc (or isn't ready) many x86/x64 only etc. > comments It has been tested mostly on x86-64, but it contains generic optimizations for all targets. It should bring even more improvements on RISC hosts, as it avoid long sequence of instructions for constant loading. > it seems that not many people are interested in sparc(64) emulation speed > or on vacation :) > or the emulation is just perfect in par with a real sun4u (i don't own one > so i can't test) The point is that emulation has a cost, and it's quite difficult to to lower it and thus improve the emulation speed. For what I have been able to see, the sparc (but also mips and sh4) targets would benefit =66rom MMU emulation improvements. But that's not easy to do either. Aurelien --=20 Aurelien Jarno GPG: 4096R/1DDD8C9B aurelien@aurel32.net http://www.aurel32.net