linux-kernel - Re: [ANNOUNCE] usbmon capture and parser script

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Date:	Fri, 18 Mar 2011 18:21:33 +0100
From:	Paul Bolle <pebolle@...cali.nl>
To:	Mauro Carvalho Chehab <mchehab@...hat.com>
Cc:	Greg KH <greg@...ah.com>,
	Linux Media Mailing List <linux-media@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	USB list <linux-usb@...r.kernel.org>
Subject: Re: [ANNOUNCE] usbmon capture and parser script

On Thu, 2011-03-17 at 08:46 -0300, Mauro Carvalho Chehab wrote:
> On a quick test, it seems that it doesn't recognize the tcpdump file 
> format (at least, it was not able to capture the dump files I got 
> with the beagleboard). Adding support for it could be an interesting 
> addition to your code. 

Please note that Micah Dowty is the maintainer of vusb-analyzer. I
mostly cleaned, etc. its usbmon support (which was originally added by
Christoph Zimmermann). Anyway, you're always free to try to add support
for another file format. I must say that Micah was rather easy to work
with.

> Btw, it seems that most of your work is focused on getting VMware logs.

Micah had a vmware.com address last time I contacted him. That should
explain that focus.

> Do you know if any of them are now capable of properly emulate USB 2.0
> isoc transfers and give enough performance for the devices to actually
> work with such high-bandwidth requirements?

This is not something I know much about. I tried to use some digital
camera over USB with qemu without much success. Apparently qemu's USB
pass through has little chance of supporting high bandwidth USB devices.
See
http://lists.nongnu.org/archive/html/qemu-devel/2010-09/msg00017.html
for the - not very interesting - answer I got when I wanted to know more
about the problems of USB pass through in qemu.

Paul Bolle

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