Date: Fri, 9 Jun 1995 17:41:12 +1000 From: Bruce Evans <bde@zeta.org.au> To: hackers@freebsd.org, mpp@legarto.minn.net Subject: Re: Ping times over PPP link to Linux box Message-ID: <199506090741.RAA22808@godzilla.zeta.org.au>
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>the Linux serial interface (looks like they use the Cyclom serial >driver - whatever that is). It's like our cy driver. >I would also be interested in knowing what kind of ping times anyone >else connecting via PPP from a FreeBSD box to a Linux box gets. For local connections the ping time used to be 0-10ms (average 5) higher for Linux due to lack of special handling for packet framing characters in the driver. Anything more than that is probably caused by the modem. I see these ping times for local connections at 115200 bps: UARTs slip ppp 16450 --> 16450 16.0ms 25.0ms 16550 --> 16450 16.5ms 25.5ms 16550 --> cd1400 17.0ms 26.0ms (new cy driver) The differences are due to different or nonexistent input fifo timeouts. Bruce
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