From owner-freebsd-net@FreeBSD.ORG Sun Apr 5 13:35:11 2009 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 36170106564A for ; Sun, 5 Apr 2009 13:35:11 +0000 (UTC) (envelope-from freebsd-net@m.gmane.org) Received: from ciao.gmane.org (main.gmane.org [80.91.229.2]) by mx1.freebsd.org (Postfix) with ESMTP id D913A8FC13 for ; Sun, 5 Apr 2009 13:35:10 +0000 (UTC) (envelope-from freebsd-net@m.gmane.org) Received: from list by ciao.gmane.org with local (Exim 4.43) id 1LqSV5-0007C9-Ij for freebsd-net@freebsd.org; Sun, 05 Apr 2009 13:35:03 +0000 Received: from 93-141-3-137.adsl.net.t-com.hr ([93.141.3.137]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 05 Apr 2009 13:35:03 +0000 Received: from ivoras by 93-141-3-137.adsl.net.t-com.hr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 05 Apr 2009 13:35:03 +0000 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-net@freebsd.org From: Ivan Voras Date: Sun, 05 Apr 2009 15:34:26 +0200 Lines: 38 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigE100CC5D7B9CFB0A0C63756C" X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: 93-141-3-137.adsl.net.t-com.hr User-Agent: Thunderbird 2.0.0.21 (Windows/20090302) In-Reply-To: X-Enigmail-Version: 0.95.7 Sender: news Subject: Re: Advice on a multithreaded netisr patch? X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 05 Apr 2009 13:35:11 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigE100CC5D7B9CFB0A0C63756C Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Robert Watson wrote: >=20 > On Sun, 5 Apr 2009, Ivan Voras wrote: >=20 >> I thought this has something to deal with NIC moderation (em) but >> can't really explain it. The bad performance part (not the jump) is >> also visible over the loopback interface. >=20 > FYI, if you want high performance, you really want a card supporting > multiple input queues -- igb, cxgb, mxge, etc. if_em-only cards are > fundamentally less scalable in an SMP environment because they require > input or output to occur only from one CPU at a time. Makes sense, but on the other hand - I see people are routing at least 250,000 packets per seconds per direction with these cards, so they probably aren't the bottleneck (pro/1000 pt on pci-e). --------------enigE100CC5D7B9CFB0A0C63756C Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAknYs2sACgkQldnAQVacBcgOzACguAsTzdt9DZStuslyOHAti/9J 9noAoPDt1v9OHmV2gx/eYD7cRClVnDMJ =UEzZ -----END PGP SIGNATURE----- --------------enigE100CC5D7B9CFB0A0C63756C--