From owner-freebsd-stable@FreeBSD.ORG Wed Jun 10 12:33:03 2015 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id B8BD3C9F for ; Wed, 10 Jun 2015 12:33:03 +0000 (UTC) (envelope-from shen.elf@gmail.com) Received: from mail-ie0-x22d.google.com (mail-ie0-x22d.google.com [IPv6:2607:f8b0:4001:c03::22d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 80B581322 for ; Wed, 10 Jun 2015 12:33:03 +0000 (UTC) (envelope-from shen.elf@gmail.com) Received: by iebgx4 with SMTP id gx4so33170172ieb.0 for ; Wed, 10 Jun 2015 05:33:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:cc:content-type; bh=l9ajh13pF+WthHfPAENoF9siUggNzNU49S3N1ux7UXM=; b=BQ0fzIFBARPtMjyueptrL8juKEpDc9RY2DFFGYFr2KClLYgE+W4ZF7W3NCr3QbzyK8 Ykgw2jbZXwYe5QXn9tE/YLZEKt5vJCARGYXrPJq8sadZYm9s52z9zmjGnHNOyaeFr1Cn u8ys/bn3yf/rNC212AqkbnjxrjSAsckuRqlSOtmOo6PMJDPMr55EV7RsPDU+HZkfwrhc 4zbInxulaRbXK1OqjNfVm2r3WWckbKattMlmHKalo0NK075SIqhtJIbS5Knm5cZ+yXA7 mcX2BNM3gZ12DgH41Zs164UthTlpIdoDGpSFdGodGac79jTV5R1F8Ojgyj+Avdg1r6j5 2edg== MIME-Version: 1.0 X-Received: by 10.107.10.151 with SMTP id 23mr3790825iok.89.1433939582802; Wed, 10 Jun 2015 05:33:02 -0700 (PDT) Received: by 10.107.15.157 with HTTP; Wed, 10 Jun 2015 05:33:02 -0700 (PDT) Date: Wed, 10 Jun 2015 20:33:02 +0800 Message-ID: Subject: High Interrupt rate since r279961 on STABLE/10 branch From: Yanhui Shen To: henry.hu.sh@gmail.com Cc: freebsd-stable@freebsd.org Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.20 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 Jun 2015 12:33:03 -0000 Hi, I noticed the interrupt rate of my FreeBSD system is very high (~35%) after upgrade from r279138 to r284205. To find out which revision cause this problem, I used a binary search manner and compiled the kernel 11 times. Finally I located to r279961, the interruption rate is abnormal since this revision. Do you have any idea about this issue? ( I'm temporarily using r279958 kernel with r284205 base system, everything is fine.) -------------------------------- Device: ThinkPad R400 (Product ID: 278225C) CPU: Intel Core 2 Duo processor T6570 (2.1 GHz) GPU: Intel Integrated Graphics 4500MHD Output of "vmstat -i" with r284205 kernel (abnormal): interrupt total rate irq1: atkbd0 1607 1 irq9: acpi0 131958 104 irq12: psm0 4281 3 irq16: uhci3 239899376 189643 irq20: hpet0 uhci0 1426118 1127 irq21: uhci1 40315 31 irq23: ehci0 33 0 irq256: vgapci0 6059 4 irq257: em0 49220 38 irq258: hdac0 62 0 irq260: ahci0:ch0 17217 13 irq261: ahci0:ch1 23 0 Total 241576269 190969 Output of "vmstat -i" with r279958 kernel (normal): interrupt total rate irq1: atkbd0 48155 3 irq9: acpi0 1581468 105 irq12: psm0 209484 13 irq19: ehci1 48099 3 irq20: hpet0 uhci0 17385585 1156 irq21: uhci1 680884 45 irq23: ehci0 31 0 irq256: vgapci0 2611430 173 irq257: em0 1342009 89 irq258: hdac0 602220 40 irq260: ahci0:ch0 236313 15 irq261: ahci0:ch1 27 0 Total 24745705 1646 The revision: https://svnweb.freebsd.org/base?view=revision&revision=279961 -------------------------------- Best regards, Yanhui Shen