In message <20010501200017.E12715@mail.netbsd.org>, "Charles M. Hannum" writes:
>
>On Tue, May 01, 2001 at 07:08:46PM -0400, Steve Bellovin wrote:

>
>> My concern is the data rate of the Novatel "Merlin for Ricochet" PCMCIA 
>> modem.  Linux has problems with its data rate (for details, see
>> http://homepages.nyu.edu/~gmp216/nrm6842/bigfastuart.html); in a very 
>> brief test today, I saw some indications that NetBSD was overflowing 
>> that buffer as well.
>
>Unless you got `silo overflow' or `ibuf flood' messages, that's not the
>problem, or the hardware isn't reporting overflows.  It also seems a
>little more suspicious since I *know* that we can keep up with a UART
>running at 115200 baud, and Ricochet maxes at not much more than that.
>

In fact, I am getting "ibuf flood" messages -- it was when I looked at 
the code to see what caused that that I wondered about the ring buffer 
size.


		--Steve Bellovin, http://www.research.att.com/~smb