From owner-freebsd-current@FreeBSD.ORG Sat Jul 17 19:21:33 2010 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 42135106564A; Sat, 17 Jul 2010 19:21:33 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from mail.zoral.com.ua (mx0.zoral.com.ua [91.193.166.200]) by mx1.freebsd.org (Postfix) with ESMTP id AA2558FC0A; Sat, 17 Jul 2010 19:21:32 +0000 (UTC) Received: from deviant.kiev.zoral.com.ua (root@deviant.kiev.zoral.com.ua [10.1.1.148]) by mail.zoral.com.ua (8.14.2/8.14.2) with ESMTP id o6HJLSbG054127 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sat, 17 Jul 2010 22:21:28 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: from deviant.kiev.zoral.com.ua (kostik@localhost [127.0.0.1]) by deviant.kiev.zoral.com.ua (8.14.4/8.14.4) with ESMTP id o6HJLSnq005169; Sat, 17 Jul 2010 22:21:28 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: (from kostik@localhost) by deviant.kiev.zoral.com.ua (8.14.4/8.14.4/Submit) id o6HJLSUY005168; Sat, 17 Jul 2010 22:21:28 +0300 (EEST) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: deviant.kiev.zoral.com.ua: kostik set sender to kostikbel@gmail.com using -f Date: Sat, 17 Jul 2010 22:21:28 +0300 From: Kostik Belousov To: Doug Barton Message-ID: <20100717192128.GM2381@deviant.kiev.zoral.com.ua> References: Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Jaerp9zHWz52Eeko" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.3i X-Virus-Scanned: clamav-milter 0.95.2 at skuns.kiev.zoral.com.ua X-Virus-Status: Clean X-Spam-Status: No, score=-2.2 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_50, DNS_FROM_OPENWHOIS autolearn=no version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on skuns.kiev.zoral.com.ua Cc: freebsd-current@freebsd.org, Rui Paulo Subject: Re: Why is intr taking up so much cpu? 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: Sat, 17 Jul 2010 19:21:33 -0000 --Jaerp9zHWz52Eeko Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Jul 17, 2010 at 12:10:26PM -0700, Doug Barton wrote: > On Sat, 17 Jul 2010, Rui Paulo wrote: >=20 > >This doesn't indicate any problem. I suggest you try to figure out what= =20 > >interrupt is causing this by adding printfs or disabling drivers one by= =20 > >one. >=20 > I've no idea where to even begin on something like that. Given that=20 > there are other -current users who are also having problems=20 > (particularly with the nvidia drivers) I'm wondering if some sort of=20 > systemic debugging isn't in order here? >=20 Note that intr time most likely come from the interrupt threads chewing the CPU, not from the real interrupt handlers doing something, and definite= ly not due to the high interrupt rate, as your vmstat -i output already shown. Run top in the mode where all system threads are shown separately (e.g. top -HS seems to do it), then watch what thread eats the processor. --Jaerp9zHWz52Eeko Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (FreeBSD) iEYEARECAAYFAkxCArgACgkQC3+MBN1Mb4i/6wCfQ1RzUrMRGCNqHJrzYjD+cdu9 hMUAoJPUz/3Y17X8GDufNYEMJSBmEAQL =GvvQ -----END PGP SIGNATURE----- --Jaerp9zHWz52Eeko--