From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 470B7C43219 for ; Tue, 22 Feb 2022 17:07:42 +0000 (UTC) Received: from localhost ([::1]:53368 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nMYdZ-0002Ph-2r for qemu-devel@archiver.kernel.org; Tue, 22 Feb 2022 12:07:41 -0500 Received: from eggs.gnu.org ([209.51.188.92]:47234) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nMYBa-000625-Rw for qemu-devel@nongnu.org; Tue, 22 Feb 2022 11:38:46 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:46878) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nMYBZ-0000v8-3D for qemu-devel@nongnu.org; Tue, 22 Feb 2022 11:38:46 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1645547924; h=from:from:reply-to: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=LYa4rHDhYe14xmC6555n1VmRCeOY76oa4WNCVke9MWk=; b=ffauRHi48s4E06LIgugjg/LTT95gFvP3LPtbhRxW3/OvnmuXaFsFgFXR8QcdX+4/LZobBt jqum/onCTju/9PhxLal4oiyjp8DKD0ROUZKvuC5oS8nxqLQsWttVVGvd1xeNNPRTi1hBTS /mb7Xqlk8ospjeUKtWS0q6c2PZ030cc= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-146-n-nHbnUDOoC3-ZeOPZv5AQ-1; Tue, 22 Feb 2022 11:38:31 -0500 X-MC-Unique: n-nHbnUDOoC3-ZeOPZv5AQ-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 3624D100CC84; Tue, 22 Feb 2022 16:38:29 +0000 (UTC) Received: from redhat.com (unknown [10.39.195.93]) by smtp.corp.redhat.com (Postfix) with ESMTPS id CD182348B8; Tue, 22 Feb 2022 16:38:25 +0000 (UTC) Date: Tue, 22 Feb 2022 16:38:22 +0000 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Alex =?utf-8?Q?Benn=C3=A9e?= Subject: Re: Analysis of slow distro boots in check-avocado (BootLinuxAarch64.test_virt_tcg*) Message-ID: References: <874k4xbqvp.fsf@linaro.org> <878ru2nacq.fsf@linaro.org> MIME-Version: 1.0 In-Reply-To: <878ru2nacq.fsf@linaro.org> User-Agent: Mutt/2.1.5 (2021-12-30) X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=berrange@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Cc: Peter Maydell , Oleg Vasilev , Idan Horowitz , Cleber Rosa , Richard Henderson , qemu-devel , Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= , Emilio Cota , Gerd Hoffmann , qemu-arm , Paolo Bonzini , Laszlo Ersek Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Tue, Feb 22, 2022 at 04:17:23PM +0000, Alex Bennée wrote: > > Alex Bennée writes: > > > Hi, > > > > TL;DR: > > > > - pc-bios/edk2-aarch64-code.fd should be rebuilt without debug > > Laszlo, > > Would it be possible to do a less debug enabled version of EDK2 on the > next update to pc-bios/edk2-*? NB, Laszlo is no longer maintaining EDK2 in QEMU, it was handed over to Philippe. I'm CC'ing Gerd too since he's a reviewer and an EDK2 contributor taking over from Lazslo in EDK2 community > > > > > So my working theory is: > > > > - booting with EFI leaves a number stale code pages > > - as the kernel boots it clears these pages triggering lots of > > slow-path writes > > - result very slow boot > > > > I think the only real solution is to improve our TB invalidation code > > but perhaps another approach would be to detect a high TB invalidation > > churn and just tb_flush the whole thing and start again? > > > > Any thoughts or ideas? > > > -- > Alex Bennée > Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|