Messages in this thread | | | Date | Wed, 26 May 1999 14:14:05 +0200 | From | Pavel Machek <> | Subject | Re: TTY_FLIPBUF_SIZE too low causing dataloss on too fast serial lines? |
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Hi!
> I tried implementing 1Mbit irda driver as a tty (same as serials > are). I _think_ I've hit the limit of TTY_FLIPBUF_SIZE. Is it > possible? I assume flipbufs are flushed every 10ms or so (am I right?); > in such case situation is pretty bad: that means 50K/sec max and > modern serial ports can do up-to twice as much. From reading sources I > _think_ that TTY_FLIPBUF_SIZE can not be easily increased.... > > Nope, it can't be easily increased without making some relatively major > changes to the tty driver. I've been meaning to do this so that the you > can use a bigger flip buffer size, where it's necesasry, though. > > One question though is how is your irda driver grabbing the characters? > Is it grabbing them all at interrupt time, or is it polling like
All at interrupt time. I wonder how do you solve this problem with serial ports: these days serials can be easily driven at speeds close to 1Mbit... (I'm talking about dumb on-board serials like NS PC87108). Pavel -- The best software in life is free (not shareware)! Pavel GCM d? s-: !g p?:+ au- a--@ w+ v- C++@ UL+++ L++ N++ E++ W--- M- Y- R+
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