Date: Sun, 3 Jul 2005 23:02:38 +1200 From: Juha Saarinen <juhasaarinen@gmail.com> To: Ted Mittelstaedt <tedm@toybox.placo.com> Cc: FreeBSD questions <freebsd-questions@freebsd.org> Subject: Re: How to troubleshoot slow network performance with Realtek 8169s? Message-ID: <b34be842050703040270e10d50@mail.gmail.com> In-Reply-To: <LOBBIFDAGNMAMLGJJCKNCEPAFBAA.tedm@toybox.placo.com> References: <b34be8420507030036291f016d@mail.gmail.com> <LOBBIFDAGNMAMLGJJCKNCEPAFBAA.tedm@toybox.placo.com>
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On 7/3/05, Ted Mittelstaedt <tedm@toybox.placo.com> wrote: >=20 > The Realtek is a cheap adapter. You can try hard-coding the > media type to see what happens, but the fact remains this is > nowhere near as good a card as the 82801B. As a result of this > there hasn't been that much attention to driver optimizations, > you can review the work here: >=20 > http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/dev/re/if_re.c >=20 > If playing around with the media type doesen't fix it you can > try a send-pr but your best off just pulling the card and > replacing it with another Intel, then mailing the card to one > of the driver developers. Maybe in 6 months to a year you > might see a faster driver in FreeBSD - or maybe not. Yeah, I know the 8169s isn't the flashest card in the universe and I don't mind donating a card or two to the developers, but with further testing -- assuming iperf isn't lying -- it seems the driver is OK and there's something happening further up the chain that I don't understand yet. What's weird is that with both 100 and 1000Mbit/s connections, the max speed is a quarter of the link speed when using applications such as ftp for transferring files. With iperf, I see 92Mbit/s on 100Mbit/s and 400-640Mbit/s on 1000mbit/s connections depending on the direction. --=20 Juha
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