And this morning, managed to get the patch to work correctly. On Tue, Jun 10, 2014 at 9:46 PM, Dave Taht <[email protected]> wrote: > On Tue, Jun 10, 2014 at 6:29 PM, John Syn <[email protected]> wrote: >> >> From: Dave Taht <[email protected]> >> Reply-To: <[email protected]> >> Date: Tuesday, June 10, 2014 at 5:41 PM >> To: <[email protected]> >> Subject: [beagleboard] Adding Byte Queue Limits: debian kernel build recipe? >> >> I have generally been delightedly following the Robert Nelson's debian >> kernel builds. >> >> https://rcn-ee.net/deb/wheezy-armhf >> >> and the day came where I wanted to try out a tiny patch adding BQL support >> to the beaglebone black. There is something of a huge gap between the >> available and largely conflicting data on the internet as to how to build a >> kernel properly and the lovely debs he provides. >> >> It's a really tiny patch, (5 lines). My hope would be to see network latency >> on the beaglebone improve dramatically with it and fq_codel. >> >> http://snapon.lab.bufferbloat.net/~d/0001-Add-BQL-support-to-cpsw-beaglebone-driver.patch >> >> But assembling all the pieces to actually build a kernel the right way elude >> me. Right now I'm trying to cross compile using an armeabihf toolchain, and >> not having figured out how to create a .deb file to use... >> link to how to cross compile a .deb kernel build?? >> >> http://eewiki.net/display/linuxonarm/BeagleBone+Black >> >> Build the kernel as shown and then add your patch (either add it to the >> /KERNEL directly or add it as a new patch in /patches and update patch.sh). >> >> tools/rebuild_deb.sh >> >> Regards, >> John > > Thank you! with that recipe I was able to build a 3.15 kernel with > a minimum of twiddling, and prove that that patch was buggy > a few minutes later (crashes in cpsw_tx_handler). :( > > What I'm observing is 32+ms worth of queueing in the ethernet driver > under load, at 100mbit, which can easily be cut to 2ms or less with BQL. > >> >> OR: >> >> ... if there's someone out there daring enough to try something that might >> help networking, but might also lock up the networking interface in this >> first test, AND can patch and build a working kernel... I'd love to see this >> patch tried. >> >> A bit about BQL: >> >> http://lwn.net/Articles/454390/ >> >> >> >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> >> For more options, visit https://groups.google.com/d/optout. >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to a topic in the >> Google Groups "BeagleBoard" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/beagleboard/hKeVYvnOt5E/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> [email protected]. >> For more options, visit https://groups.google.com/d/optout. > > > > -- > Dave Täht > > NSFW: > https://w2.eff.org/Censorship/Internet_censorship_bills/russell_0296_indecent.article
-- Dave Täht NSFW: https://w2.eff.org/Censorship/Internet_censorship_bills/russell_0296_indecent.article -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
