Date: Fri, 18 Oct 2002 00:49:04 -0400 From: "Jim McGrath" <jimmcgra@bellatlantic.net> To: "Luigi Rizzo" <rizzo@icir.org>, "Petri Helenius" <pete@he.iki.fi> Cc: "Lars Eggert" <larse@ISI.EDU>, <freebsd-net@FreeBSD.ORG> Subject: RE: ENOBUFS Message-ID: <NDBBKKEELKBCJJBEGDECCEHHCGAA.jimmcgra@bellatlantic.net> In-Reply-To: <20021017201158.A75351@carp.icir.org>
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Careful here. Read the errata sheet!! I do not believe the em driver uses these parameters, and possibly for a good reason. Jim > -----Original Message----- > From: owner-freebsd-net@FreeBSD.ORG > [mailto:owner-freebsd-net@FreeBSD.ORG]On Behalf Of Luigi Rizzo > Sent: Thursday, October 17, 2002 11:12 PM > To: Petri Helenius > Cc: Lars Eggert; freebsd-net@FreeBSD.ORG > Subject: Re: ENOBUFS > > > On Thu, Oct 17, 2002 at 11:55:24PM +0300, Petri Helenius wrote: > ... > > I seem to get about 5-6 packets on an interrupt. Is this tunable? At > > just reading the source code, yes, it appears that the card has > support for delayed rx/tx interrupts -- see RIDV and TIDV definitions > and usage in sys/dev/em/* . I don't know in what units are the values > (28 and 128, respectively), but it does appear that tx interrupts are > delayed a bit more than rx interrupts. > > They are not user-configurable at the moment though, you need to rebuild > the kernel. > > cheers > luigi > > > 50kpps the card generates 10k interrupts a second. Sending generates > > way less. This is about 300Mbps so with the average packet size of > > 750 there should be room for more packets on the interface queue > > before needing to service an interrupt? > > > > What´s the way to access kernel adapter-structure? Is there an utility > > that can view the values there? > > > > > Pete > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-net" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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