Date: Thu, 17 Oct 2002 20:11:58 -0700 From: Luigi Rizzo <rizzo@icir.org> To: Petri Helenius <pete@he.iki.fi> Cc: Lars Eggert <larse@ISI.EDU>, freebsd-net@FreeBSD.ORG Subject: Re: ENOBUFS Message-ID: <20021017201158.A75351@carp.icir.org> In-Reply-To: <0be401c2761f$855af670$8c2a40c1@PHE>; from pete@he.iki.fi on Thu, Oct 17, 2002 at 11:55:24PM %2B0300 References: <065901c27495$56a94c40$8c2a40c1@PHE> <3DAC8FAD.30601@isi.edu> <068b01c2749f$32e7cf70$8c2a40c1@PHE> <20021015161055.A27443@carp.icir.org> <06c901c274d8$e5280b80$8c2a40c1@PHE> <3DAD01A7.3020807@isi.edu> <071501c274db$222c3ea0$8c2a40c1@PHE> <3DAD06AF.7060701@isi.edu> <0be401c2761f$855af670$8c2a40c1@PHE>
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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
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