From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51764) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gSWqH-0004iy-Dp for qemu-devel@nongnu.org; Thu, 29 Nov 2018 19:39:38 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gSWqB-0002Ff-Co for qemu-devel@nongnu.org; Thu, 29 Nov 2018 19:39:36 -0500 Received: from out4-smtp.messagingengine.com ([66.111.4.28]:52887) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gSWq7-0001UK-Qx for qemu-devel@nongnu.org; Thu, 29 Nov 2018 19:39:29 -0500 Date: Thu, 29 Nov 2018 19:39:15 -0500 From: "Emilio G. Cota" Message-ID: <20181130003915.GA3323@flamenco> References: <20181128053834.10861-1-richard.henderson@linaro.org> <20181128221530.GA32160@flamenco> <9d890088-8dd6-517d-52a7-a6166f0cd8a6@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9d890088-8dd6-517d-52a7-a6166f0cd8a6@linaro.org> Subject: Re: [Qemu-devel] [PATCH 00/12] tcg: Improve register allocation for calls List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Richard Henderson Cc: qemu-devel@nongnu.org On Thu, Nov 29, 2018 at 11:23:09 -0800, Richard Henderson wrote: > On 11/28/18 2:15 PM, Emilio G. Cota wrote: > > Unfortunately, it doesn't seem to help, performance-wise. > > That is really disappointing, considering the size gains are huge -- even more > dramatically for non-x86 hosts. I will see about some more benchmarking on > this for other host/guest combinations. A64 and POWER9 host numbers: https://imgur.com/a/m6Pss99 There's quite a bit of noise in the P9 measurements, but it's a shared machine so I can't do much about that. I'll update the A64 results with error bars later tonight, when I get further results. E.