FF? On Mon, Mar 7, 2022 at 12:03 PM John Dammeyer <[email protected]> wrote:
> What 'FF' that isn't running? > > > -----Original Message----- > > From: gene heskett [mailto:[email protected]] > > Sent: March-07-22 4:19 AM > > To: Enhanced Machine Controller (EMC) > > Subject: Re: [Emc-users] Pi4 with LinuxCNC and MESA 7i92H > > > > On Monday, 7 March 2022 03:00:41 EST John Dammeyer wrote: > > > Thanks Gene, > > > Didn't even think to look there. Was logged in remotely in the pi user > > > folder and don't have access to the /boot. (Just haven't given > > > permission). Went to the system and found it in /boot just as you > > > said. > > > > > > console=serial0,115200 console=tty1 root=PARTUUID=f1b66b19-02 > > > rootfstype=ext4 elevator=deadline fsck.repair=yes isolcpus=3 idle=poll > > > rootwait quiet splash plymouth.ignore-serial-consoles > > > > > > This site talks about > > > > https://www.linuxtopia.org/online_books/linux_kernel/kernel_configurati > > > on/re46.html > > > > > > isolcpus=1,2,3 > > > makes no difference. The latency error still shows up. > > > > Yup, the arms are a different beast. I get a very consisten 12 u-secs > > here as long as FF isn't running, its an IRQ pig. > > > > > Here's some info on the ForceTurbo > > > > https://forum.linuxcnc.org/27-driver-boards/42413-rpi4-7i96-improving-p > > > ing-times > > > > > > But this implies the stock RPi4 will _not_ run LCNC without heatsin+fan > > > plus boosting above stock. > > > > True, but an old 12 volt video card fan, re-oiled and running on 5 volts > > from the same 5A supply running the pi, toss the wall wart, its not big > > enough and it will crash, a half inch from those stick on heat sinks is > > all the coolant mine has ever needed, and I don't think I'm boosting the > > pi4's clock. Some of my hand controls to jog it, since a human is pretty > > slow, are running on a 200hz thread to reduce the load on the 1 kilohertz > > servo-thread, but I have experimentally run the servo-thread at 4 > > kilohertz w/o any problems for a couple weeks. Basically, the rpi3 has > > its tongue dragging on the floor doing this, very little left when LCNC > > is running, but the rpi4 has enough extra speed that even 4khz isn't a > > problem. And 200hz is plenty fast enough for the hand controls. > > > > > > John > > > > > > > -----Original Message----- > > > > From: gene heskett [mailto:[email protected]] > > > > Sent: March-06-22 9:57 PM > > > > To: Enhanced Machine Controller (EMC) > > > > Subject: Re: [Emc-users] Pi4 with LinuxCNC and MESA 7i92H > > > > > > > > On Sunday, 6 March 2022 23:20:41 EST John Dammeyer wrote: > > > > > Hi Sam, > > > > > I cannot find the equivalent of cmdline.txt on my Pi4 LinuxCNC > > > > > system. > > > > > This is the file that has the Idle=poll etc. Does this mean it's > > > > > not > > > > > part of the default LinuxCNC implementation for a Pi4? > > > > > > > > > > So where does it go and how is it accessed? Is there a how to > > > > > document for this? Thanks > > > > > John > > > > > > > > You probably didn't look in the right place John, if thats a raspios > > > > install, aka raspian back in buster days, its in the /boot partition. > > [...] > > Take care and stay well John. > > > > 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, 1940) > > If we desire respect for the law, we must first make the law respectable. > > - Louis D. Brandeis > > > > > > > > > > > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
