From owner-freebsd-bugs@FreeBSD.ORG Tue Jul 14 16:10:01 2009 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 2D7CD106566B for ; Tue, 14 Jul 2009 16:10:01 +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 E24438FC16 for ; Tue, 14 Jul 2009 16:10:00 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.14.3/8.14.3) with ESMTP id n6EGA0TJ040232 for ; Tue, 14 Jul 2009 16:10:00 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.3/8.14.3/Submit) id n6EGA0TV040231; Tue, 14 Jul 2009 16:10:00 GMT (envelope-from gnats) Resent-Date: Tue, 14 Jul 2009 16:10:00 GMT Resent-Message-Id: <200907141610.n6EGA0TV040231@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, Vladimir Krasovsky Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id AFC771065676 for ; Tue, 14 Jul 2009 16:08:09 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from www.freebsd.org (www.freebsd.org [IPv6:2001:4f8:fff6::21]) by mx1.freebsd.org (Postfix) with ESMTP id 9DC1A8FC0C for ; Tue, 14 Jul 2009 16:08:09 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from www.freebsd.org (localhost [127.0.0.1]) by www.freebsd.org (8.14.3/8.14.3) with ESMTP id n6EG89O9006250 for ; Tue, 14 Jul 2009 16:08:09 GMT (envelope-from nobody@www.freebsd.org) Received: (from nobody@localhost) by www.freebsd.org (8.14.3/8.14.3/Submit) id n6EG89l8006249; Tue, 14 Jul 2009 16:08:09 GMT (envelope-from nobody) Message-Id: <200907141608.n6EG89l8006249@www.freebsd.org> Date: Tue, 14 Jul 2009 16:08:09 GMT From: Vladimir Krasovsky To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Cc: Subject: misc/136759: iostat displays wrong I/O statistics with -c 1 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, 14 Jul 2009 16:10:01 -0000 >Number: 136759 >Category: misc >Synopsis: iostat displays wrong I/O statistics with -c 1 >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 Jul 14 16:10:00 UTC 2009 >Closed-Date: >Last-Modified: >Originator: Vladimir Krasovsky >Release: 7.0 >Organization: yandex.ru >Environment: FreeBSD host 7.0-STABLE FreeBSD 7.0-STABLE #1: Fri Feb 29 14:05:58 MSK 2008 root@host:/opt/obj/opt/src/sys/W5L_AMD64_ULE amd64 >Description: First line of iostat output always displays arbitrary (and wrong) numbers. user@host:~$ for i in 1 2 3 4; do iostat -c $i -d da2; done da2 KB/t tps MB/s 6.31 64 0.40 da2 KB/t tps MB/s 6.31 64 0.40 12.64 53 0.65 da2 KB/t tps MB/s 6.31 64 0.40 6.67 27 0.18 2.00 23 0.04 da2 KB/t tps MB/s 6.31 64 0.40 2.00 23 0.04 3.27 11 0.04 7.25 16 0.11 As you can see the first line is always the same. Though on different machines at different loads it may differ. >How-To-Repeat: for i in 1 2 3 4; do iostat -c $i -d da2; done >Fix: Use -c 2 or more. >Release-Note: >Audit-Trail: >Unformatted: