Date: Wed, 04 Jul 2001 11:33:33 +0200 From: sthaug@nethelp.no To: julian@elischer.org Cc: bjf@samurai.com, net@freebsd.org Subject: Re: PPPoE latency Message-ID: <71213.994239213@verdi.nethelp.no> In-Reply-To: Your message of "Tue, 03 Jul 2001 08:56:44 -0700" References: <3B41EB3C.EF185F3F@elischer.org>
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> > Here's a ping on my friend's machine (Mac ping, sorry for lack of precision): > > > > Packets out/in/bad/%loss = 64/64/0/0.0 > > Round Trip Time (ms) min/avg/max = 14/24/59 > > > > My box should be fine cpu-wise, it's a Celeron/300, and isn't doing > > anything else. The card PPPoE is running over is an ISA 10BaseT > > D-Link card using the ed(4) driver, if that makes any difference. I > > track STABLE with this box, it's currently at: > > > > FreeBSD katana.apt.samurai.com 4.3-STABLE FreeBSD 4.3-STABLE #13: Sun > > Jun 24 01:43:39 EDT 2001 > > > > Any thoughts? I can live with this, the connection is rock solid and > > has been for over a year now, just curious as to why. Apologies if > > this has come up before, I searched the list archives and the bug > > list. > > you may be a good test case for us.. > we have heard of this negraph latency for a while but have never had a good > test case.. if I send you test code can you run it for me? I believe the latency for the basic netgraph code is a complete non-issue. I have an ADSL connection where I can control both ends (this is for an ISP which is just starting to test ADSL). - With straight bridging (RBE on the Cisco at the ISP end), I get ping roundtrip times of 9.2 ms on the average (ping a host reachable through the router, not the router itself). - With PPPoe (and of course netgraph) I get ping roundtrip times of 9.4 ms on the average. Thus the basic netgraph machinery plus userland ppp adds around 0.2 ms to the roundtrip times. I see no reason to complain about this. Steinar Haug, Nethelp consulting, sthaug@nethelp.no To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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