Date: Tue, 04 Jun 2002 08:47:13 -0700 From: Lars Eggert <larse@ISI.EDU> To: Luigi Rizzo <rizzo@icir.org> Cc: net@FreeBSD.ORG Subject: Re: Dummynet WFQ Message-ID: <3CFCE101.3040108@isi.edu> References: <3CFB9BC4.9080506@isi.edu> <20020603122913.A78688@iguana.icir.org>
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[-- Attachment #1 --] Luigi Rizzo wrote: > the signal that tell the WFQ algorithm when you can transmit the > next packet comes from the pipe. The latter ticks either at a > predefined rate (as configured with the 'bw NNN bit/s' parameter), > or from the tx interrupt coming from a device (e.g. you can say > something like 'bw ed0' to get the transmit clock from device ed0). > > HOWEVER: i have implemented the necessary machinery in dummynet (it > is a function called if_tx_rdy()) and in the user interface, "ipfw", > but have not added the hooks to call if_tx_rdy() in each device > driver because these calls are somewhat expensive, and you probably do not want > them on a 100Mbit/s interface. > > See http://www.geocrawler.com/archives/3/165/2002/3/0/8222181/ > on how to use them (a search for "dummynet if_tx_rdy()" should return > some results). I'm trying to merge this into the sis driver, which seems to batch transmissions together. For clarification, do you expect one if_tx_rdy() call per packet or one per batch? Per packet may result in a burst of these calls, does dummynet handle this? Thanks, Lars -- Lars Eggert <larse@isi.edu> USC Information Sciences Institute [-- Attachment #2 --] 0 *H 01 0 + 0 *H 00 G0 *H 01 0 UZA10U Western Cape10U Cape Town10 U Thawte1 0U Certificate Services1(0&U Personal Freemail RSA 2000.8.300 010824164000Z 020824164000Z0T10 UEggert1 0 U*Lars10U Lars Eggert1 0 *H larse@isi.edu00 *H 0 |\Pw v~~ FDooӦA\- Cˀ4.)&{肋 ,z (ܷر߈T7_'txGH^tt/ҹB8%t<#ֲN V0T0*+e!0 00L2uMyffBNUbNJJcdZ2s0U 0 larse@isi.edu0 U 0 0 *H aJPMՒ ]cѭC+kS+wZ1gY",YT41 j 6:~℩ D~Kؚl=u(ՎM?cF7@}T00 G0 *H 01 0 UZA10U Western Cape10U Cape Town10 U Thawte1 0U Certificate Services1(0&U Personal Freemail RSA 2000.8.300 010824164000Z 020824164000Z0T10 UEggert1 0 U*Lars10U Lars Eggert1 0 *H larse@isi.edu00 *H 0 |\Pw v~~ FDooӦA\- Cˀ4.)&{肋 ,z (ܷر߈T7_'txGH^tt/ҹB8%t<#ֲN V0T0*+e!0 00L2uMyffBNUbNJJcdZ2s0U 0 larse@isi.edu0 U 0 0 *H aJPMՒ ]cѭC+kS+wZ1gY",YT41 j 6:~℩ D~Kؚl=u(ՎM?cF7@}T080fErtcvE.0 *H 01 0 UZA10U Western Cape10U Cape Town10U Thawte Consulting1(0&U Certification Services Division1$0"UThawte Personal Freemail CA1+0) *H personal-freemail@thawte.com0 000830000000Z 040827235959Z01 0 UZA10U Western Cape10U Cape Town10 U Thawte1 0U Certificate Services1(0&U Personal Freemail RSA 2000.8.3000 *H 0 32c %E>nx'gڈD)c5*mp<ܮto034qmOe KaU5u'rװ |CBPQ<9TIf - ki N0L0)U "0 0 10UPrivateLabel1-2970U 0 0 U 0 *H 1KG]qSl]y=&b""I'{9$ *8PUl LGl X1B li+@]jy.%݊ Z<D&iHΥbb10001 0 UZA10U Western Cape10U Cape Town10 U Thawte1 0U Certificate Services1(0&U Personal Freemail RSA 2000.8.30G0 + a0 *H 1 *H 0 *H 1 020604154714Z0# *H 1 ކ {vr %Z0R *H 1E0C0 *H 0*H 0 *H @0+0 *H (0 *H 101 0 UZA10U Western Cape10U Cape Town10 U Thawte1 0U Certificate Services1(0&U Personal Freemail RSA 2000.8.30G0 *H jF0=yl⛮,( nG.$qD;ux@J0 {E?d*n=;GQ7il@.%r .J$%
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