On Tue, Jun 10, 2014 at 6:29 PM, John Syn <john3...@gmail.com> wrote: > > From: Dave Taht <dave.t...@gmail.com> > Reply-To: <beagleboard@googlegroups.com> > Date: Tuesday, June 10, 2014 at 5:41 PM > To: <beagleboard@googlegroups.com> > 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 beagleboard+unsubscr...@googlegroups.com. > > 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 > beagleboard+unsubscr...@googlegroups.com. > 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 -- 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
