Re: [Ftdi-usb-sio-devel] High CPU usage

[Toan P. <tph...@gm...>]

you shouldn't get that high CPU utilization.  Would you please compile
the kernel with usb debug, and ftdi_sio loaded with debug=1.
I also use the same chip on linux 2.6.21 and tried on the lastest
Ubuntu and had no problem.  Although, i didn't run it at 230400, and
flow control enabled. If possible, would you please try to run it at
lower baudrate and/or without software flow control?
.  thank you.

Toan


On Tue, Mar 10, 2009 at 11:41 AM, iMac 266 <im...@gm...> wrote:
> Hi,
>
> I am using a FT232RL USB to Serial adapter.  Baudrate = 230400, one stop and
> start bit, software flow control enabled.
>
> I am using this on the 2.6.27 kernel.
>
> I am wondering why my cpu is at 100% when I am transmitting data
> continuously.  When I use the same adapter and python code on a windows
> machine I get 3% cpu usage. Is this a known issue?
>
> Thanks,
>
> Tim
>
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