Date: Mon, 21 Sep 2009 15:55:55 -0400 From: Pierre-Luc Drouin <pldrouin@pldrouin.net> To: Ed Schouten <ed@80386.nl> Cc: freebsd-usb@freebsd.org Subject: Re: usb/138659: uftdi driver broken in RELENG_8/CURRENT Message-ID: <4AB7DA4B.8050105@pldrouin.net> In-Reply-To: <20090921194933.GB95398@hoeg.nl> References: <4AB6DA79.7050209@pldrouin.net> <200909211827.53014.hselasky@c2i.net> <20090921194933.GB95398@hoeg.nl>
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Ed Schouten wrote:
> Hi Pierre-Luc, Hans,
>
> * Hans Petter Selasky <hselasky@c2i.net> wrote:
>
>> You need to set raw mode for the TTY device I think. Maybe Ed can give you the
>> function name you need to call to do that?
>>
>
> Yes. You need cfmakeraw() to do that (or do everything yourself). See
> src/lib/libc/gen/termios.c to see what it does.
>
> So what I'm interested in, is the following:
>
> "even that device is answering requests slower and slower until
> it stalls completely within 1 hour"
>
> Could you run `pstat -t' to see what's going on when it stalls? This
> nifty tool just gives some random statistics on TTYs. Very useful to see
> what's going on. Where data is stuck, etc. etc.
>
>
Here is what I get from pstat when I run my executable:
while ( 1 )
while? pstat -t ttyU0 | grep ttyU0
while? sleep 1
while? end
LINE INQ CAN LIN LOW OUTQ USE LOW COL SESS PGID STATE
ttyU0 0 0 0 0 0 0 0 4 0 0 ICl
ttyU0 0 0 0 0 0 0 0 4 0 0 ICl
ttyU0 0 0 0 0 0 0 0 4 0 0 ICl
ttyU0 0 0 0 0 0 0 0 4 0 0 ICl
ttyU0 0 0 0 0 0 0 0 4 0 0 ICl
ttyU0 0 0 0 0 0 0 0 4 0 0 ICl
ttyU0 0 0 0 0 0 0 0 4 0 0 ICl
ttyU0 0 0 0 0 0 0 0 4 0 0 ICl
ttyU0 1920 0 0 192 1984 0 199 4 0 0 ICOil
ttyU0 1920 0 0 192 1984 0 199 4 0 0 ICOil
ttyU0 1920 0 0 192 1984 0 199 4 0 0 ICOil
ttyU0 1920 0 0 192 1984 0 199 6 0 0 ICOil
ttyU0 1920 0 0 192 1984 0 199 6 0 0 ICOil
ttyU0 1920 0 0 192 1984 0 199 6 0 0 ICOil
ttyU0 1920 0 0 192 1984 0 199 6 0 0 ICOil
ttyU0 1920 0 0 192 1984 0 199 6 0 0 ICOil
ttyU0 1920 0 0 192 1984 0 199 6 0 0 ICOil
ttyU0 1920 0 0 192 1984 0 199 6 0 0 ICOil
ttyU0 1920 0 0 192 1984 0 199 6 0 0 ICOil
ttyU0 1920 0 0 192 1984 0 199 6 0 0 ICOil
ttyU0 1920 0 0 192 1984 0 199 6 0 0 ICOil
ttyU0 1920 0 0 192 1984 0 199 6 0 0 ICOil
ttyU0 1920 0 0 192 1984 0 199 6 0 0 ICOil
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