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SubjectRe: Slow PPP?
On Fri, 29 Mar 1996, Mike Castle wrote:

> Amazingly enough Steve Davies said:
> > I just tried an experiment to check the throughput (using ftp) between my
> > host and my ISP. Firstly in Windoze 3.1, and then in Linux (1.3.77). My
> > modem is a USR Sportster 28.8K internal ISA-bus, connecting to my ISP at
> > 28.8k (serial port set spd_vhi, 115,200 baud, h/w handshake)
> >
> > 100Kb test file Winsock ppp-2.2.0e
> > -----------------------------------------------------------------
> > /pub/test/emptyfile (compressible) 6.24 Kb/s 3.80 Kb/s (-40%)
> > /pub/test/fullfile (non-compressible) 3.11 Kb/s 2.80 Kb/s (-10%)
>
> Which end did you take the timings from? I assume the ISP end.
> If not, these numbers are meaningless.

Due to the nature of the beast, these are the timings of an FTP receive
from my ISP (They provide a /pub/test directory for just this purpose)

> With cslip, and 1.3.80, over masquerade, I'm getting 3.5 Kb/s
> with random data.

Hmmm... Nice :-)

> What happens if you do NOT set serial port to spd_vhi? I've
> never done that. I still don't see a reason to do it. Then
> again, I don't use the computer with the modem attached for much
> else, so the time spent talking to the modem isn't that important
> for me.

If I don't set spd_vhi then the kernel refuses to set the speed to
115,200baud and 'chat' soon fills up my system logs !

Hope this clears thing up...

Steve



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