From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1KCy2N-0004lg-2f for qemu-devel@nongnu.org; Sun, 29 Jun 2008 10:37:55 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1KCy2K-0004ks-KK for qemu-devel@nongnu.org; Sun, 29 Jun 2008 10:37:53 -0400 Received: from [199.232.76.173] (port=42881 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1KCy2K-0004kl-H5 for qemu-devel@nongnu.org; Sun, 29 Jun 2008 10:37:52 -0400 Received: from fmmailgate02.web.de ([217.72.192.227]:43203) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1KCy2K-0006uf-0q for qemu-devel@nongnu.org; Sun, 29 Jun 2008 10:37:52 -0400 Received: from smtp08.web.de (fmsmtp08.dlan.cinetic.de [172.20.5.216]) by fmmailgate02.web.de (Postfix) with ESMTP id 827EFE39E372 for ; Sun, 29 Jun 2008 16:37:51 +0200 (CEST) Received: from [88.64.4.12] (helo=[192.168.1.198]) by smtp08.web.de with asmtp (TLSv1:AES256-SHA:256) (WEB.DE 4.109 #226) id 1KCy2J-00006T-00 for qemu-devel@nongnu.org; Sun, 29 Jun 2008 16:37:51 +0200 Message-ID: <48679E35.5090100@web.de> Date: Sun, 29 Jun 2008 16:37:41 +0200 From: Jan Kiszka MIME-Version: 1.0 References: <20080629140120.5626.1590.stgit@gleb-debian.qumranet.com.qumranet.com> In-Reply-To: <20080629140120.5626.1590.stgit@gleb-debian.qumranet.com.qumranet.com> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig7C99BDDF096CCC92B8B616EE" Sender: jan.kiszka@web.de Subject: [Qemu-devel] Re: [PATCH 0/3] Fix guest time drift under heavy load. Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig7C99BDDF096CCC92B8B616EE Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Gleb Natapov wrote: > Resending one more time. There was no response last time I've sent it. >=20 > Qemu device emulation for timers might be inaccurate and > causes coalescing of several IRQs into one. It happens when the > load on the host is high and the guest did not manage to ack the > previous IRQ. The first patch in the series fixes this by changing > qemu_irq subsystem to return IRQ delivery status information. > If device is notified that IRQs where lost it can regenerate them > as needed. The following two patches add IRQ regeneration to PIC and RT= C > devices. s/PIC/PIT. :) I must have overslept the first posting. In fact, we are currently discussing such measures for our scenario as well - we are also suffering from lost PIT IRQs. So I will definitely give your series a try next week! Jan --------------enig7C99BDDF096CCC92B8B616EE Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iEYEARECAAYFAkhnnj4ACgkQniDOoMHTA+k1GACfTix3SzKXG1Ccw4+VRGqpn82s GqcAn3QTPpn9XLl+ztvYg90MpZ3PZNMl =+BfC -----END PGP SIGNATURE----- --------------enig7C99BDDF096CCC92B8B616EE--