Date: Fri, 20 Jul 2007 15:11:00 -0700 From: Julian Elischer <julian@elischer.org> To: Jack Vogel <jfvogel@gmail.com> Cc: Vince <jhary@unsane.co.uk>, current@freebsd.org, =?ISO-8859-1?Q?St=E5le_Kristoffersen?= <staale@kristoffersen.ws> Subject: Re: Slow networkperformance in current? Message-ID: <46A132F4.3030703@elischer.org> In-Reply-To: <2a41acea0707201451h47ac79a6n1b0bb4987b692c52@mail.gmail.com> References: <b1fa29170707161247r1a9421cbxf4ec9be1e4c63f7d@mail.gmail.com> <20070718041159.GC37935@cdnetworks.co.kr> <20070718044700.GE37935@cdnetworks.co.kr> <20070718124350.GA25799@eschew.pusen.org> <46A06D8D.1070604@unsane.co.uk> <20070720122443.GA29372@eschew.pusen.org> <2a41acea0707200810n21843c76s9b0f4f37ef92722f@mail.gmail.com> <20070720184550.GA22877@eschew.pusen.org> <2a41acea0707201203o28722443v8ab2bc9a8450bb92@mail.gmail.com> <20070720200216.GB22877@eschew.pusen.org> <2a41acea0707201451h47ac79a6n1b0bb4987b692c52@mail.gmail.com>
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Jack Vogel wrote: > On 7/20/07, Ståle Kristoffersen <staale@kristoffersen.ws> wrote: >> On 2007-07-20 at 12:03, Jack Vogel wrote: >> > The stack being capable, as I said, of delivering the goods says >> nothing >> > of the driver, what NIC is it? Did you ask if anyone else with that >> > hardware is seeing a problem, I came into this thread somewhat late. >> >> I'm running this nic: >> re0: <RealTek 8168/8111B PCIe Gigabit Ethernet> port 0x7e00-0x7eff mem >> 0xfd3ff000-0xfd3fffff irq 18 at device 0.0 on pci3 >> >> But I'm guessing it's not the NIC or its drivers fault, because I get the >> same performance (with 100% CPU) using localhost. > > Well, I just tried that on one of the machines here in my cube, running > iperf across a localhost connection I get 1.25 Gb/s, what do you see? > A second slightly older box doing the same thing only gets 977 Mb, I > wonder if that's front side bus relative, would make sense. > > And what do you see? Loopback can sometimes be a lot slower than actual traffic due to scheduling considerations. Robert Watson has more information on this. > > Jack > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
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