From owner-freebsd-bugs@FreeBSD.ORG Tue Jan 4 12:50:12 2011 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 1F2EE10656AE for ; Tue, 4 Jan 2011 12:50:12 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 73E138FC26 for ; Tue, 4 Jan 2011 12:50:09 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.4/8.14.4) with ESMTP id p04Co9Es048230 for ; Tue, 4 Jan 2011 12:50:09 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.4/8.14.4/Submit) id p04Co98n048229; Tue, 4 Jan 2011 12:50:09 GMT (envelope-from gnats) Resent-Date: Tue, 4 Jan 2011 12:50:09 GMT Resent-Message-Id: <201101041250.p04Co98n048229@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Florian Smeets Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E32AE1065673 for ; Tue, 4 Jan 2011 12:40:59 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from red.freebsd.org (unknown [IPv6:2001:4f8:fff6::22]) by mx1.freebsd.org (Postfix) with ESMTP id D34638FC0C for ; Tue, 4 Jan 2011 12:40:59 +0000 (UTC) Received: from red.freebsd.org (localhost [127.0.0.1]) by red.freebsd.org (8.14.4/8.14.4) with ESMTP id p04Cexf7047290 for ; Tue, 4 Jan 2011 12:40:59 GMT (envelope-from nobody@red.freebsd.org) Received: (from nobody@localhost) by red.freebsd.org (8.14.4/8.14.4/Submit) id p04Cexbd047289; Tue, 4 Jan 2011 12:40:59 GMT (envelope-from nobody) Message-Id: <201101041240.p04Cexbd047289@red.freebsd.org> Date: Tue, 4 Jan 2011 12:40:59 GMT From: Florian Smeets To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Cc: Subject: kern/153674: i386/XEN idle thread shows wrong percentages X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 04 Jan 2011 12:50:12 -0000 >Number: 153674 >Category: kern >Synopsis: i386/XEN idle thread shows wrong percentages >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Tue Jan 04 12:50:09 UTC 2011 >Closed-Date: >Last-Modified: >Originator: Florian Smeets >Release: FreeBSD 9.0-CURRENT >Organization: >Environment: FreeBSD ec2 9.0-CURRENT FreeBSD 9.0-CURRENT #111: Sat Jan 1 09:45:23 UTC 2011 root@chch.daemonology.net:/usr/obj/i386.i386/usr/src/sys/XEN i386 >Description: >From time to time the idle thread does not seem to get accounted correctly, it goes through the roof and then comes down slowly, but only in top's process list. The header seems correct. CPU: 0.0% user, 0.0% nice, 0.0% system, 0.0% interrupt, 100% idle PID USERNAME THR PRI NICE SIZE RES STATE TIME WCPU COMMAND 11 root 1 171 ki31 0K 8K RUN 19.1H 24566.89% idle 12 root 11 -64 - 0K 88K WAIT 1:28 2.00% intr >How-To-Repeat: I've seen this on an EC2 instance running ami-5b82b72f. This seems to happen when the instance has been idle for a while and suddenly has do to some work. >Fix: >Release-Note: >Audit-Trail: >Unformatted: