>>> Would this include flip buffers overflowing? (I thought that was
>>> sync'd to HZ).
>>
>>What's a flip bluffer? Do you mean a flip-flop?
On Mon, 12 Oct 1998, Tuukka Toivonen wrote:
>I guess it could be a pair of DMA buffers where another buffer gets
>processed with CPU while another buffer is filling... and when the second
>buffer is full, the buffers are flipped.
It's funny how the same things suddenly pop up frequently (in very
different places), and then again disappear for ages... today I saw a
message on linux-kernel which *might* explain a little what are flip
buffers:
>>>>>>> Quote
>From [EMAIL PROTECTED] Wed Oct 14 15:08:13 1998
Date: Wed, 14 Oct 1998 03:23:48 +0100 (BST)
From: Alan Cox <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED], [EMAIL PROTECTED]
Subject: Re: 921Kbps on Linux: is it possible ?!?!
> definition for a baud rate of 921.6Kbps (it only goes up to 460.8Kbps).
> Therefore, it's not possible to use setserial to set a serial port to this
> speed ... is it ?!?!
You probably need to add one
> My question is: do we need to add support to 921.6Kbps in the termbits.h
> file or is there another way to set this speed on a serial port ?!?!
The serial driver flip buffers break at 921.6kbps - the 100Hz tick isnt
reliably going to empty your flip buffer in time, so you'll need some
kind of way of running with different (eg double) buffers
<<<<<<< Quote ends
I would understand this that if you change the HZ too _low_, things would
break.
--
| Tuukka Toivonen <[EMAIL PROTECTED]> [PGP public key
| Homepage: http://www.ee.oulu.fi/~tuukkat/ available]
| Try also finger -l [EMAIL PROTECTED]
| Studying information engineering at the University of Oulu
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