From owner-freebsd-net@FreeBSD.ORG Mon Mar 11 16:38:13 2013 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 6A6D31C2; Mon, 11 Mar 2013 16:38:13 +0000 (UTC) (envelope-from jfvogel@gmail.com) Received: from mail-vb0-x230.google.com (mail-vb0-x230.google.com [IPv6:2607:f8b0:400c:c02::230]) by mx1.freebsd.org (Postfix) with ESMTP id 1B690ED4; Mon, 11 Mar 2013 16:38:13 +0000 (UTC) Received: by mail-vb0-f48.google.com with SMTP id fc21so1716058vbb.7 for ; Mon, 11 Mar 2013 09:38:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:x-received:in-reply-to:references:date:message-id :subject:from:to:cc:content-type; bh=z0J2x4ZETnmxWUX3NiOEpEHzEGLJFLx2qjig+GFlnZA=; b=Bq3a3Lm+dG9/COGiRiCbr9a0sEv+aPiRpxnatFgpDoQ0ZEwCURoNdxPMvLOiSlgIZ6 PQNONncsl17pG5VuZUfe6s7unN2VYaEwwurhrbjYtFb3lfUWxwe6yh2Rxm3tNbivJFdV PTfAKoeeezZ0yzrjXTQ9NKLODCMf1CkfFxxDBWiXs1xg533wUjWpDZAXlg/RhFrL58j7 a/hhIaWm37Gni7ZYVd7sdSosYXwAjbzRq8Tw70XjFRs5VGn27/IvEXeWmBovWLYxm8iu YEcDLKYU4X7Lp5l7Lri3JBR4Kaxwg4+AMlr2TW7SasQBKlfKCeeTQ7Zc+OKDV0ENCcPz OaHA== MIME-Version: 1.0 X-Received: by 10.52.30.48 with SMTP id p16mr4566607vdh.118.1363019892571; Mon, 11 Mar 2013 09:38:12 -0700 (PDT) Received: by 10.220.191.132 with HTTP; Mon, 11 Mar 2013 09:38:12 -0700 (PDT) In-Reply-To: <201303111605.r2BG5I6v073052@hergotha.csail.mit.edu> References: <1154859394.3748712.1362959165419.JavaMail.root@erie.cs.uoguelph.ca> <513DB550.5010004@freebsd.org> <201303111605.r2BG5I6v073052@hergotha.csail.mit.edu> Date: Mon, 11 Mar 2013 09:38:12 -0700 Message-ID: Subject: Re: Limits on jumbo mbuf cluster allocation From: Jack Vogel To: Garrett Wollman Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.14 Cc: freebsd-net@freebsd.org, rmacklem@uoguelph.ca, andre@freebsd.org X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 11 Mar 2013 16:38:13 -0000 How large are you configuring your rings Garrett? Maybe if you tried reducing them? Jack On Mon, Mar 11, 2013 at 9:05 AM, Garrett Wollman < wollman@hergotha.csail.mit.edu> wrote: > In article <513DB550.5010004@freebsd.org>, andre@freebsd.org writes: > > >Garrett's problem is receive side specific and NFS can't do much about it. > >Unless, of course, NFS is holding on to received mbufs for a longer time. > > Well, I have two problems: one is running out of mbufs (caused, we > think, by ixgbe requiring 9k clusters when it doesn't actually need > them), and one is livelock. Allowing potentially hundreds of clients > to queue 2 MB of requests before TCP pushes back on them helps to > sustain the livelock once it gets started, and of course those packets > will be of the 9k jumbo variety, which makes the first problem worse > as well. > > -GAWollman > > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" >