On Tuesday 23 February 2021 01:39:28 Thomas J Powderly wrote: > RPi rt5.10 builds ok (on the rpi4) and is running latency-histogram > --base 80000 --servo 1000000 now > > ( in my tests for stepper cfgs those parms seem to work reliably for > days ) > > > Long story short, build had no problems, > > but at end when i wanted to copy the new kernel7l-blah.img to /boot > > I couldnt find it > > > I searched entire fs for it using different tools, no joy, no file > near the 6.8Meg of kdoren's .img... > > so, i just got the tgz of kdorens pre-compiled files nad installed > that. > Thats considerably smaller than the 4.19.71-rt24-v7l+ #1 SMP PREEMPT RT I built from the raspbian supplied preempt-rt srcs over 2 years ago now. Since that src can be bult for any architecture, I suspect its building a bunch of stuff the pi doesn't use. A lot of bloat IOW.
And I like you, couldn't find it at first. And raspbian will not even reply to a request for help with it. However I did eventually find it. and organized what I found into a tgz of not quite 30 megs which when unpacked to a buster armhf install, actually installs the files over the files on the sd card. There is more work to do before you stick the card back into the pi, see the README thaat goes with that tgz on my web site. > > The kernel booted fine with usb and mouse and keyboard support and > with no reduction of my 4g mem. > > ooh just noticed 300+ fps w 4 glx gears :-) > My cheap monitors won't go that fast, and are generally 60 hz vertical locked. An ex bro-in-laws remark that it was "good enough for the girls I go with" seems to apply here, but that is good news for the 4k monitor owners. Running a 7i90HD card with 3 7i42TA's to buffer and protect its 3.3 volt logic, driven by rpspi.ko, I have no base thread, however back in pi3 days I added a slower thread, running at 200 hz that services the jog dials that allow me to run the lathe manually just as if it still had hand cranks. 200 hz is plenty fast enough for that. And I've not taken that stuff out with a 2 gig pi4 install. If its not broken, don't fix it. And its for sure not broken. But I do keep it uptodate with apt or synaptic, and I have built me a buildbot to make new linuxcnc's from master by putting all that traffic on a separate drive plugged into a usb3 port. Any write traffic taken off the sd card will extend its life, so will using a big card, and that one is a 64Gigger, nearly 3 years old now. Swap has been moved to another SSD also plugged into the other usb3 port, giving the pi several gigs of swap. Currantly showing as having used 65 megs of 10 gigs. Thats from building several new linuxcnc's since the last reboot. The only write traffic to the u-sd card is from apt or my build scripts keeping the master install up to date, or my editing new gcode files for the next job. And whatever files amanda may keep in /tmp as it backs up the pi every nite. Take care, stay well and safe all. > tomp > > On 2/21/21 9:18 PM, Thomas J Powderly wrote: > > maybe of interest > > > > https://github.com/kdoren/linux > > > > NB: wear fireproof pants > > > > tomp I've pulled it, but haven't moved it to the pi yet. I have several other irons in the fire. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
