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[209.51.188.17]) by mx.google.com with ESMTPS id d19si627177qkk.358.2020.02.26.01.17.58 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 26 Feb 2020 01:17:58 -0800 (PST) Received-SPF: pass (google.com: domain of qemu-devel-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; Authentication-Results: mx.google.com; dkim=fail header.i=@redhat.com header.s=mimecast20190719 header.b=iblg1E6y; spf=pass (google.com: domain of qemu-devel-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+alex.bennee=linaro.org@nongnu.org"; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from localhost ([::1]:40710 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j6spJ-0008EX-Js for alex.bennee@linaro.org; Wed, 26 Feb 2020 04:17:57 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:34500) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j6sje-0006YS-Mv for qemu-devel@nongnu.org; Wed, 26 Feb 2020 04:12:07 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1j6sjd-0001iT-MB for qemu-devel@nongnu.org; Wed, 26 Feb 2020 04:12:06 -0500 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:42373 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1j6sjd-0001gZ-9P for qemu-devel@nongnu.org; Wed, 26 Feb 2020 04:12:05 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1582708324; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=5a1j0mSl+M/pIz+M919dsVJFe539qaboygWtsmycrPg=; b=iblg1E6yeStP6YInPbo7ki0LhCb3qqZptK8dU7ssm336ySAPO9yU1zuC0mYZAHVEfztSSx NcgKxOuJc/lUJ/o0D/D2cQ99+Nr6p0TcN2RsoVcjg/pyLN+Vrh5WqiYk3NBi60KJlUI/A9 HdTF1DiMCeBjnHnRjBfhJzn9nVTh3J4= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-133-fH5xlxwPNkmUOmyDk2hpCA-1; Wed, 26 Feb 2020 04:11:58 -0500 X-MC-Unique: fH5xlxwPNkmUOmyDk2hpCA-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id ED14E1007276; Wed, 26 Feb 2020 09:11:56 +0000 (UTC) Received: from localhost (unknown [10.43.2.114]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6FE815C54A; Wed, 26 Feb 2020 09:11:55 +0000 (UTC) Date: Wed, 26 Feb 2020 10:11:53 +0100 From: Igor Mammedov To: Howard Spoelstra Subject: Re: Sudden slowdown of ARM emulation in master Message-ID: <20200226101153.2fd3f7f8@redhat.com> In-Reply-To: References: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.81 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Richard Henderson , QEMU Developers , Niek Linnenbank , qemu-arm , Paolo Bonzini , Philippe =?UTF-8?B?TWF0aGlldS1EYXVkw6k=?= Errors-To: qemu-devel-bounces+alex.bennee=linaro.org@nongnu.org Sender: "Qemu-devel" X-TUID: UBUb56ju4OsV On Wed, 26 Feb 2020 09:45:48 +0100 Howard Spoelstra wrote: > On Wed, Feb 26, 2020 at 9:42 AM Peter Maydell > wrote: > > > On Tue, 25 Feb 2020 at 23:08, Niek Linnenbank > > wrote: > > > > > Just now I was working on some small fixes for the cubieboard machine > > and rebasing my Allwinner H3 branches. > > > While doing some testing, I noticed that suddenly the machines were much > > slower than before. > > > I only see this happening when I rebase to this commit: > > > ca6155c0f2bd39b4b4162533be401c98bd960820 ("Merge tag 'patchew/ > > 20200219160953.13771-1-imammedo@redhat.com' of > > https://github.com/patchew-project/qemu into HEAD") > > > > Yeah, I noticed a slowdown yesterday as well, but haven't tracked it down > > as yet. The first thing would be to do a git bisect to try to narrow > > down what commit caused it. > > > > thanks > > -- PMM > > > > > Perhaps related? I noticed a slow down on qemu-system-ppc and tracked it > down here: > https://lists.nongnu.org/archive/html/qemu-devel/2020-02/msg07262.html There might be some implicit dependency in TCG that depends on ram_size. I'm looking for what it could be > Best, > Howard