On Tue, Apr 24, 2007 at 05:46:16PM -0700, Inaky Perez-Gonzalez wrote:
>
> Hi All
>
> As part of the work for Wireless USB, I need to introduce in the USB stack
> the concept of unauthorized vs authorized device. The first one is one that
> cannot be really used until we move it to authorized, but
On Sun, Feb 25, 2007 at 08:53:03AM -0800, David Brownell wrote:
>
>
> > So, why do I want a non-blocking aio_read and aio_write file operation?
>
> Without it, how would you achieve I/O overlap, and thus maximize the
> I/O throughput accessible when streaming data to/from userspace? The
> descr
I've been doing some USB benchmarking on a PS3 running 2.6.16
(Fedora Core 5).
I'm measuring bulk throughput to/from the Universal Software Radio
Peripheral (USRP) (http://www.ettus.com) used with the GNU Radio
software radio package.
On pretty much every contemporary machine we are able to susta
On Wed, Jan 25, 2006 at 04:11:23PM -0800, Greg KH wrote:
>
> "appropriated" from whom? Does the USB.org group recognize this 0xfffe
> vendor id?
>
> thanks,
> greg k-h
I doubt they recognize it. However, it's about 60,000 higher than any
others that have been allocated, so it seemed like a rea
On Wed, Jan 25, 2006 at 10:12:38AM +0100, [EMAIL PROTECTED] wrote:
> Hi,
>
> --- Ursprüngliche Nachricht ---
> Datum: 24.01.2006 23:24
> Von: Greg KH <[EMAIL PROTECTED]>
> An: [EMAIL PROTECTED]
> Betreff: Re: [linux-usb-devel] OSDL/GNU vendors id?
>
> > What does OSDL or GNU have to do with this
On Sun, May 01, 2005 at 09:29:41PM +0200, Harald Welte wrote:
> Hi!
>
> I've been playing quite a bit with the gnuradio[1] project's USRP[2]
> recently. One of the key issues with the USRP is to get the highes
> possible USB2.0 throughput (since the ADC and DAC's actually outperform
> the slow US
On Fri, Nov 05, 2004 at 10:44:36AM +0100, Axel Waggershauser wrote:
> Hi Eric,
>
> On Fri, 2004-10-29 at 12:51 -0700, Eric Blossom wrote:
> > On Fri, Oct 29, 2004 at 01:06:34PM +0200, Axel Waggershauser wrote:
> > > another question: Have you tried accessing two devices at
On Tue, Nov 02, 2004 at 09:23:20PM +0100, Axel Waggershauser wrote:
> On Thu, 2004-10-28 at 13:25 -0700, Eric Blossom wrote:
> I have tried to reproduce your bandwidth results by patching the
> fx2_programmer
> (http://volodya-project.sourceforge.net/fx2_programmer.php) to use you
On Fri, Oct 29, 2004 at 01:06:34PM +0200, Axel Waggershauser wrote:
> Hi Eric,
>
> another question: Have you tried accessing two devices at the same time?
> If so, what was your total throughput per sec?
>
I haven't, but I'll give it a try over the next couple of days and let
you know what happ
On Fri, Oct 29, 2004 at 09:59:22AM +0200, Duncan Sands wrote:
> > > Most interesting. How many URBs do you use?
> >
> > It's configurable. I think I'm using 100 16KB URBs right now. That's
> > probably overkill, but our hardware can only tolerate about 200 us
> > worth of jitter before it over/u
On Fri, Oct 29, 2004 at 10:07:33AM +0200, Axel Waggershauser wrote:
> Hi,
>
> 1. looks like every byte transfered with your "fast usb" lib is
> memcopied at least two times: in your fusb*.cc code and in the usbfs
> kernel code, right? Meaning worrying about sg-list "optimized" drivers
> is sort of
On Fri, Oct 29, 2004 at 12:27:45AM +0200, Oliver Neukum wrote:
>
> > We built an FX2 based software radio peripheral and we routinely
> > sustain 32MB/sec in either direction. CPU consumption is minimal --
> > on the order of 5% of a 1.4 GHz Pentium M. We did it all in user
> > space using libus
> Hi,
>
> I have to write a custom driver for a FX2 based camera module that
> should be able to reach a bulk throughput of about 30 MBytes/sec from
> the device to user space memory. The available CPU performance is less
> than a 1GHz VIA EDEN. Is the libusb capable to provide this performance?
On Tue, Apr 06, 2004 at 07:42:55PM -0700, David Brownell wrote:
> Eric Blossom wrote:
> >Hi,
> >
> >Does anyone have bulk transfer throughput measurements for any of the
> >EHCI controllers?
>
> Nothing organized, let us know what you find out.
Thanks.
>
>
Hi,
Does anyone have bulk transfer throughput measurements for any of the
EHCI controllers?
We're looking for controllers that can sustain 32MB/sec in both
directions (half duplex of course). Our software radio peripheral can
do that using the Intel 82801DB EHCI. We'd like to figure out what
ot
On Fri, Nov 14, 2003 at 01:40:14PM -0800, David Brownell wrote:
> Eric Blossom wrote:
> >http://comsec.com/wiki?UniversalSoftwareRadioPeripheral
> >
> >Our goals are to maximize throughput on the USB and to minimize
> >the interpacket jitter that we see at the peri
On Fri, Nov 14, 2003 at 01:40:14PM -0800, David Brownell wrote:
> Eric Blossom wrote:
>
> That should certainly not be happening! Can you reproduce this
> with a pure kernel driver that doesn't use usbfs/devio? And
> with the current 2.4.23 code? (Or better yet, 2.6.0-test9
derstand the desire to multiplex the USB between
different endpoints. The issue is with regard to in-order transfer of
multiple outstanding requests to the same endpoint.
Thanks,
Eric Blossom
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