From owner-freebsd-current@FreeBSD.ORG Fri Aug 31 15:28:50 2007 Return-Path: Delivered-To: current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id A20EE16A41A for ; Fri, 31 Aug 2007 15:28:50 +0000 (UTC) (envelope-from bruce@cran.org.uk) Received: from muon.bluestop.org (muon.bluestop.org [80.68.94.188]) by mx1.freebsd.org (Postfix) with ESMTP id 69A8013C459 for ; Fri, 31 Aug 2007 15:28:50 +0000 (UTC) (envelope-from bruce@cran.org.uk) Received: from [10.0.10.13] (dyn-62-56-116-79.dslaccess.co.uk [62.56.116.79]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by muon.bluestop.org (Postfix) with ESMTP id 0C7B73000D for ; Fri, 31 Aug 2007 16:24:29 +0100 (BST) Message-ID: <46D83351.9000407@cran.org.uk> Date: Fri, 31 Aug 2007 16:27:13 +0100 From: Bruce Cran User-Agent: Thunderbird 2.0.0.6 (Windows/20070728) MIME-Version: 1.0 To: current@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Subject: High interrupt load on VIA C3 machine X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 31 Aug 2007 15:28:50 -0000 I recently upgraded to 7-CURRENT on my VIA EPIA router, and have found that there's a constant interrupt load of around 15%. My dmesg reports the CPU as: CPU: VIA C3 Nehemiah+RNG+AES (533.36-MHz 686-class CPU) Origin = "CentaurHauls" Id = 0x698 Stepping = 8 Features=0x381b93f real memory = 132055040 (125 MB) avail memory = 119701504 (114 MB) uname -a: FreeBSD router.draftnet 7.0-CURRENT FreeBSD 7.0-CURRENT #4: Fri Aug 31 07:04:22 BST 2007 brucec@router.draftnet:/usr/obj/usr/src/sys/ROUTER i386 The first few lines of top -S are: last pid: 1394; load averages: 0.08, 0.12, 0.21 up 0+01:59:10 16:13:59 57 processes: 3 running, 39 sleeping, 15 waiting CPU states: 3.1% user, 0.0% nice, 4.8% system, 17.0% interrupt, 75.1% idle Mem: 7360K Active, 6116K Inact, 12M Wired, 48K Cache, 9504K Buf, 90M Free Swap: 2048M Total, 2048M Free PID USERNAME THR PRI NICE SIZE RES STATE TIME WCPU COMMAND 11 root 1 171 ki31 0K 8K RUN 100:01 81.98% idle 12 root 1 -32 - 0K 8K WAIT 12:31 7.96% swi4: clock sio 1394 brucec 1 46 0 3512K 1744K RUN 0:01 4.98% top 586 root 1 44 0 5016K 2516K RUN 2:39 0.00% ppp 1044 root 1 44 0 3176K 980K select 0:51 0.00% powerd 28 root 1 -68 - 0K 8K WAIT 0:45 0.00% irq11: vr0 dc3 30 root 1 -68 - 0K 8K WAIT 0:32 0.00% irq12: dc1 While there's a high interrupt load, vmstat -i doesn't show anything wrong: interrupt total rate irq0: clk 718003 99 irq4: sio0 897 0 irq5: dc0 31 0 irq8: rtc 919064 127 irq10: dc2 uhci0+ 31 0 irq11: vr0 dc3 63548 8 irq12: dc1 62120 8 irq14: ata0 1555 0 irq15: ata1 581 0 Total 1765830 245 I had thought of using hwpmc to find out what was happening, but unfortunately VIA CPUs aren't supported yet. Is there another way I can find out what's going on? -- Bruce Cran