From owner-freebsd-hackers@FreeBSD.ORG Wed Aug 19 07:18:37 2009 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 34122106568C for ; Wed, 19 Aug 2009 07:18:37 +0000 (UTC) (envelope-from doconnor@gsoft.com.au) Received: from cain.gsoft.com.au (cain.gsoft.com.au [203.31.81.10]) by mx1.freebsd.org (Postfix) with ESMTP id 9B3F08FC6B for ; Wed, 19 Aug 2009 07:18:36 +0000 (UTC) Received: from inchoate.gsoft.com.au (inchoate.gsoft.com.au [203.31.81.30]) (authenticated bits=0) by cain.gsoft.com.au (8.13.8/8.13.8) with ESMTP id n7J7IXJT077922 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); Wed, 19 Aug 2009 16:48:34 +0930 (CST) (envelope-from doconnor@gsoft.com.au) From: "Daniel O'Connor" To: Zaphod Beeblebrox Date: Wed, 19 Aug 2009 16:48:20 +0930 User-Agent: KMail/1.9.10 References: <200908191253.27951.doconnor@gsoft.com.au> <5f67a8c40908182335y59679131u373e8a3b27856909@mail.gmail.com> In-Reply-To: <5f67a8c40908182335y59679131u373e8a3b27856909@mail.gmail.com> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart1857688.HQhRhjnCY3"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200908191648.28262.doconnor@gsoft.com.au> X-Spam-Score: -3.601 () ALL_TRUSTED,AWL,BAYES_00 X-Scanned-By: MIMEDefang 2.63 on 203.31.81.10 Cc: freebsd-hackers@freebsd.org Subject: Re: PCI IRQ latency X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 19 Aug 2009 07:18:37 -0000 --nextPart1857688.HQhRhjnCY3 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Wed, 19 Aug 2009, Zaphod Beeblebrox wrote: > On Tue, Aug 18, 2009 at 11:23 PM, Daniel O'Connor=20 wrote: > > Unfortunately it seems that _something_ blocks interrupts for >4 > > milliseconds, however I have no real idea how to go about finding > > what it is.. Does anyone have any suggestions? (apart from get a > > new DAQ card, I know this one already :) > > This is a huge shot-in-the-dark, but could this be something like > ACPI or some other motherboard legacy cpu-using evil? Would it be > possible to test on something opposite-ish of what you're using (ie: > amd vs. intel) just to cycle out all the potential goo? It's worth a shot, I'll see if I can dig up some other hardware, thanks. =2D-=20 Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C --nextPart1857688.HQhRhjnCY3 Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (FreeBSD) iD8DBQBKi6dE5ZPcIHs/zowRAqsgAJ9WNdRa3jJDo8kuzmTeYirStXQWjgCgpBBt EFUY0XhqWSdGNv8Quh8p12M= =+wq0 -----END PGP SIGNATURE----- --nextPart1857688.HQhRhjnCY3--