From owner-freebsd-usb@FreeBSD.ORG Fri Jan 28 08:53:38 2011 Return-Path: Delivered-To: freebsd-usb@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 9A375106564A for ; Fri, 28 Jan 2011 08:53:38 +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 1EB9E8FC0A for ; Fri, 28 Jan 2011 08:53:37 +0000 (UTC) Received: from ur.dons.net.au (ppp203-122-198-244.lns6.adl6.internode.on.net [203.122.198.244]) (authenticated bits=0) by cain.gsoft.com.au (8.14.4/8.14.3) with ESMTP id p0S8rRB9031293 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NO); Fri, 28 Jan 2011 19:23:28 +1030 (CST) (envelope-from doconnor@gsoft.com.au) Mime-Version: 1.0 (Apple Message framework v1082) Content-Type: text/plain; charset=us-ascii From: "Daniel O'Connor" In-Reply-To: <201101280948.27511.hselasky@c2i.net> Date: Fri, 28 Jan 2011 19:23:27 +1030 Content-Transfer-Encoding: quoted-printable Message-Id: References: <9CF6C32F-E230-446B-94FC-C57F0F02B0E4@gsoft.com.au> <201101280858.05077.hselasky@c2i.net> <2E5206C4-9327-4270-8948-FD44C62C645D@gsoft.com.au> <201101280948.27511.hselasky@c2i.net> To: Hans Petter Selasky X-Mailer: Apple Mail (2.1082) X-Spam-Score: 0.163 () BAYES_00,RDNS_DYNAMIC X-Scanned-By: MIMEDefang 2.67 on 203.31.81.10 Cc: freebsd-usb@freebsd.org Subject: Re: libusb performance on 8.1 X-BeenThere: freebsd-usb@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: FreeBSD support for USB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 28 Jan 2011 08:53:38 -0000 On 28/01/2011, at 19:18, Hans Petter Selasky wrote: > There are some hard limits in the libusb source code. Just search for = 16K in=20 > decimal. In the kernel the limit is bigger and I guess you don't need = to=20 > change anything there. Ahh OK thanks, I was looking in the kernel. >=20 >> Is it possible to change the amount that is buffered? This is a = specialised >> application so a custom kernel is no problem. Even a hint in the = right >> direction would be greatly appreciated :) >=20 >>=20 >>> You could also try an XHCI controller, because the BULK buffering is = done >>> differently there. >>=20 >> OK thanks, I'll try that too. >=20 > --HPS >=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