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List:       linux-usb-devel
Subject:    Re: [linux-usb-devel] USB2 throuput performance with libusb
From:       Feyd <feyd () seznam ! cz>
Date:       2004-11-30 9:42:42
Message-ID: 20041130104242.5e461edf () veagle ! suse ! cz
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On Mon, 22 Nov 2004 12:52:05 +0100
Oliver Neukum <oliver@neukum.org> wrote:

> > 
> > Whould an incorrect alignment/packetization cause a real error or only
> > hurt performance?
> 
> A real error. Within a transfer you need to use maximum sized packets.
> If you don't the transfer will end prematurely. Improper alignment means
> short packets (or sending garbage).

So lets have a list of properly aligned buffers, how can I submit it in one
transfer? The usb_sg_init uses multiple urbs and thus multiple transfers,
if I understand it correctly.

Feyd


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