From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from list by lists.gnu.org with archive (Exim 4.71) id 1a3WRu-0006ww-QE for mharc-grub-devel@gnu.org; Mon, 30 Nov 2015 16:57:30 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37501) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a3RM5-00021L-58 for grub-devel@gnu.org; Mon, 30 Nov 2015 11:31:09 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1a3RM0-0002pv-6Z for grub-devel@gnu.org; Mon, 30 Nov 2015 11:31:09 -0500 Received: from mx1.redhat.com ([209.132.183.28]:51774) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a3RM0-0002pr-2H for grub-devel@gnu.org; Mon, 30 Nov 2015 11:31:04 -0500 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) by mx1.redhat.com (Postfix) with ESMTPS id 6743468E1B; Mon, 30 Nov 2015 16:31:03 +0000 (UTC) Received: from vitty.brq.redhat.com.smtpmail-local-domain (vitty.brq.redhat.com [10.34.26.3]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id tAUGV0oS009292 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 30 Nov 2015 11:31:01 -0500 From: Vitaly Kuznetsov To: Andrei Borzenkov Subject: Re: [PATCH] calibrate_tsc(): use the Stall() EFI boot service on GRUB_MACHINE_EFI References: <1416992361-4167-1-git-send-email-lersek@redhat.com> <56589925.20207@gmail.com> Date: Mon, 30 Nov 2015 17:31:00 +0100 In-Reply-To: <56589925.20207@gmail.com> (Andrei Borzenkov's message of "Fri, 27 Nov 2015 20:55:49 +0300") Message-ID: <87h9k3jvp7.fsf@vitty.brq.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 X-Mailman-Approved-At: Mon, 30 Nov 2015 16:57:28 -0500 Cc: The development of GNU GRUB , decui@microsoft.com, lersek@redhat.com X-BeenThere: grub-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list Reply-To: The development of GNU GRUB List-Id: The development of GNU GRUB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 30 Nov 2015 16:31:10 -0000 Andrei Borzenkov writes: > 26.11.2014 11:59, Laszlo Ersek =D0=BF=D0=B8=D1=88=D0=B5=D1=82: >> HyperV Gen2 virtual machines have no PIT; guest code should rely on UE= FI >> services instead. >>=20 > > Could you retest with current master? It now supports multiple methods > to calibrate TSC and should avoid PIT on UEFI systems. Unfortunately, current master (grub-2.02-beta2-561-g346a494) still doesn't work for me, timer keeps running like crazy on Gen2 Hyper-V VMs. --=20 Vitaly