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Date: Thu, 30 Oct 1997 19:48:56 -0500
To: "Brian J. McGovern" <mcgovern@spoon.beta.com>, hackers@FreeBSD.ORG
From: dennis <dennis@etinc.com>
Subject: Re: Win 95 PPP faster than pppd?
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At 06:11 PM 10/30/97 -0500, Brian J. McGovern wrote:
>Sorry for the cross-post, but, although this is question, I think it'll
>need the knowledge base of the hackers list.
>
>Anyhow, today, I ran a Windows 95 client, and a FreeBSD 2.2.2 and 2.2.5
>PPPd client through a remote access server that I'm testing. DTE rate
>on the 16550s were 115200 in all cases. VJ compression on, bsd
>compression off. I FTP'ed a TSB-standard file that has been rated
>"very compressible". I ran dozens of iterations on both the Win 95,
>and FreeBSD box, and got consistent results.
>
>The FreeBSD boxes managed about 8.26 K/s. The modem DTE port
>was saturated at 115200bps +/- 20bps .
>
>The Win95 box managed about 10.5 K/s. Again, the DTE port on the modem
>was saturated at 115200bps +/- 20bps.
>
>Anyone care to take a guess at why there is such a difference? I hand-checked
>all of the transfer times and file sizes, so both clients are calculating
>the throughput properly. I did notice that the FreeBSD boxes are sending
>1 1/2 - 2 times the amount of traffic back upstream (appears to be
>acks from TCPDUMP on the FTP Server). The only other strangeness I noticed
>was that the window size on the Win95 boxes were ~7-8K, compared to the
>15-16K on the FreeBSD boxes.
>
>Just to check to see if it was a client problem, I also used fetch to
>pull some files. Same results.
>		-Brian

Perhaps FreeBSD actually gives some cpu to other tasks running in
the system, unlike windows. I assume that you were using the same
modem in each box...external or internal?

dennis