Re: [linux-usb-devel] *BAD* impact of usb on PCI performance

[Georg Acher]

On Sun, Jun 03, 2001 at 10:54:21PM +0200, johan verrept wrote:
 
> How and when is this choice made?
> What is the impact of let's say a common low speeddevice like a mouse of keyboard?
> If this slows down the system in such a way, they could be considered unusable...

No, only bulk transfers are affected, low speed control has no loopback. The
loop is switched on, when at least one URB is in progress, that has
USB_NO_FSBR not set. It is switched off after ~50ms (if no new URBs are
submitted).
-- 
         Georg Acher, [EMAIL PROTECTED]         
         http://www.in.tum.de/~acher/
          "Oh no, not again !" The bowl of petunias          

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