From owner-svn-src-head@FreeBSD.ORG Tue Nov 15 21:21:34 2011 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 9263E106566B; Tue, 15 Nov 2011 21:21:34 +0000 (UTC) (envelope-from mdf356@gmail.com) Received: from mail-ey0-f182.google.com (mail-ey0-f182.google.com [209.85.215.182]) by mx1.freebsd.org (Postfix) with ESMTP id 9CFB28FC20; Tue, 15 Nov 2011 21:21:33 +0000 (UTC) Received: by eyd10 with SMTP id 10so8176119eyd.13 for ; Tue, 15 Nov 2011 13:21:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=k3v1b0S3XUGl9F8z8T8A5A3zplNW3f5cBGnwfUVHmx0=; b=UI7F6lDM2voZSKxJ0ONLqZPERcDC5Kc1dOf8YYqcsBqcCwoWqTybLWHnE1t0kaL6j+ tRAsIaLv5YNpccR22R0kEPz3EGKUyW0M+VYp6exXcyqSXEp1t3tSh9nGfqucr51PicMT Bz/RrO0HC431issK9uT/YC3kD56Lv0bN7oB4w= MIME-Version: 1.0 Received: by 10.68.33.134 with SMTP id r6mr45342986pbi.76.1321392091653; Tue, 15 Nov 2011 13:21:31 -0800 (PST) Sender: mdf356@gmail.com Received: by 10.68.56.97 with HTTP; Tue, 15 Nov 2011 13:21:31 -0800 (PST) In-Reply-To: References: <201111152048.pAFKmvNC016452@svn.freebsd.org> <201111152202.24093.hselasky@c2i.net> Date: Tue, 15 Nov 2011 13:21:31 -0800 X-Google-Sender-Auth: Y69BSkjEKvMMiGZo0V1APJoH6R8 Message-ID: From: mdf@FreeBSD.org To: Hans Petter Selasky Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: "svn-src-head@freebsd.org" , "svn-src-all@freebsd.org" , "src-committers@freebsd.org" Subject: Re: svn commit: r227541 - head/sys/dev/usb/controller X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Nov 2011 21:21:34 -0000 On Tue, Nov 15, 2011 at 1:20 PM, wrote: > On Tue, Nov 15, 2011 at 1:02 PM, Hans Petter Selasky w= rote: >> For USB compliant operation, the USB stack requires hz to be greater or = equal >> to 250 hz, to put it like that. Mostly a requirement in USB gadget/devic= e >> mode. > > Really? =A0That's news to me. =A0Is that documented somewhere? =A0I know = we > still use hz=3D100 internally, but we're on stable/7 still so not using > the new USB stack yet. ... and I also just remembered that I have seen recommendations that, when FreeBSD is used as a virtual machine, hz should be set to 100 so that the virtual interrupt overhead is reduced. Those two recommendations are at odds with each other. Thanks, matthew