From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56168) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d8nKq-0005JK-NC for qemu-devel@nongnu.org; Thu, 11 May 2017 08:36:49 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d8nKn-0007sF-Li for qemu-devel@nongnu.org; Thu, 11 May 2017 08:36:48 -0400 Received: from mx1.redhat.com ([209.132.183.28]:48366) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d8nKn-0007ru-Fn for qemu-devel@nongnu.org; Thu, 11 May 2017 08:36:45 -0400 Date: Thu, 11 May 2017 13:36:40 +0100 From: "Dr. David Alan Gilbert" Message-ID: <20170511123639.GE2078@work-vm> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Subject: [Qemu-devel] e1000e migration List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: dmitry@daynix.com Cc: qemu-devel@nongnu.org Hi Dmitry, Have you seen any problems with e1000e migration under windows? I've got a repeatable case where after migration with e1000e windows hangs/almost hangs. I'm seeing the e1000e generate interrupts at a very very high rate (maybe ~1000 second ish?) after migration. Some versions of qemu do it and some dont, but my attempts at bisection lead me to code that should be irrelevant. Prior to migration I see: 36461@1494504466.711929:e1000e_irq_pending_interrupts ICR PENDING: 0x100000 (ICR: 0x80100082, IMS: 0x1f00004) 36461@1494504466.711992:e1000e_irq_pending_interrupts ICR PENDING: 0x0 (ICR: 0x80000082, IMS: 0x1a00004) 36461@1494504466.712076:e1000e_irq_pending_interrupts ICR PENDING: 0x0 (ICR: 0x80000082, IMS: 0x1f00004) 36461@1494504466.712245:e1000e_irq_pending_interrupts ICR PENDING: 0x0 (ICR: 0x80000082, IMS: 0x1a00004) 36461@1494504466.712332:e1000e_irq_pending_interrupts ICR PENDING: 0x0 (ICR: 0x80000082, IMS: 0x1f00004) which I think the ICR means: 31 - int asserted 20 - RxQ0 - receive queue 0 interrupt 7 - RXT0 - receiver timer interrupt 1 - TXQE - Transmit Queue empty after migration it varies more, I'm seeing mostly: 21977@1494504516.320707:e1000e_irq_pending_interrupts ICR PENDING: 0x1000000 (ICR: 0x815000c2, IMS: 0x1a00004) 31 - int asserted 24 - 'Other' 22 - TxQ0 interrupt 20 - RxQ0 interrupt 07 - RXT0 Receiver timer interrupt 06 - RX0 - Receiver overrun 01 - TXQE - Transmit queue empty For reference this is https://bugzilla.redhat.com/show_bug.cgi?id=1447935 Dave -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK