(and I meant isolcpus 1,2,3) On Tue, Aug 27, 2024 at 12:09 PM Sam Sokolik <samco...@gmail.com> wrote:
> I have been goofing around with a rpi5 with the linuxcnc image. The > latency looks good - but if you set a base thread of 50000ns - it will > over-run. So - I don't think it is 'as good' as a good pc. > > (just idle=poll and isolcpus 2,3,4) > > Still playing with tweeks to the rt kernel though - so maybe I can get it > better. > > And - the hal_gpio driver does look very cool to configure the pi i/o > > sam > > https://photos.app.goo.gl/SqHxLeRUMLD5pMjf8 > > On Tue, Aug 27, 2024 at 12:02 PM Chris Albertson < > albertson.ch...@gmail.com> wrote: > >> The Pi5 has very roughly about 70% of the performance of an Intel Core >> i5-8250U. A lot of people are using Intel-based PCs that are slower and >> older than the i5. >> >> Then, if you are using the Mesa FPGA cards, how much does the Linux >> computer’s performance matter? >> >> Again, the storage device does matter. SD cards are very slow. The Pi5 >> can use “real” SSD. >> >> >> > On Aug 27, 2024, at 9:37 AM, John Dammeyer <jo...@autoartisans.com> >> wrote: >> > >> > I've read a posting on another forum where the author states he's >> running LinuxCNC with a Raspberry Pi using the Pi4 (and now Pi5) I/O pins >> configured to duplicate the PC parallel port. With the quad core processor >> on the Pi is it now fast enough to duplicate a PC with a parallel port or >> is the guy full of BS? >> > John >> > >> >> -----Original Message----- >> >> From: Chris Albertson [mailto:albertson.ch...@gmail.com] >> >> Sent: July 13, 2024 11:40 AM >> >> To: Enhanced Machine Controller (EMC) >> >> Subject: Re: [Emc-users] LinuxCNC 2.9.3 has been released >> >> >> >> If the old Lenovo PC has ahard drive, or better yet an SSD inside,then >> it will >> >> run much better then the Pi4 that is runniong off an SD card. Those >> cards a >> >> re very slow. >> >> >> >> If you want to upgrade the hardware replace th mechanical hard drive >> in the >> >> PC with a SATA SSD. If it already has an SSD, then you are good >> already >> >> >> >>> On Jul 13, 2024, at 11:24�AM, John Dammeyer <jo...@autoartisans.com> >> >> wrote: >> >>> >> >>> >> >>> >> >>>> From: andy pugh [mailto:bodge...@gmail.com] >> >>>> >> >>>> On Sat, 13 Jul 2024 at 19:00, John Dammeyer <jo...@autoartisans.com> >> >>>> wrote: >> >>>>> >> >>>>> Hi Andy, >> >>>>> On my workbench for playing around I'm running 2.8.4 on a Pi4 with >> an >> >> LCD >> >>>> touch screen and the MESA 7i92H. How easy to update that? >> >>>> >> >>>> The best thing to do with a Pi is probably to make a new SD card from >> >>>> the LinuxCNC image, then copy your existing config across (probably >> >>>> easiest to put the linuxcnc folder on a USB stick then swap SD cards) >> >>>> Then you can always go back to the old, working, SD card if there is >> a >> >>>> problem. >> >>>> >> >>> >> >>> Thanks. That's what I figured. >> >>> What about the 2.8.1 PC? Better to replace it? I picked it up >> surplus for >> >> about $75 a number of years ago. I have a second one as a spare. >> >>> John >> >>> >> >>> >> >>> >> >>> _______________________________________________ >> >>> Emc-users mailing list >> >>> Emc-users@lists.sourceforge.net >> >>> https://lists.sourceforge.net/lists/listinfo/emc-users >> >> >> >> >> >> >> >> _______________________________________________ >> >> Emc-users mailing list >> >> Emc-users@lists.sourceforge.net >> >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > >> > >> > >> > _______________________________________________ >> > Emc-users mailing list >> > Emc-users@lists.sourceforge.net >> > https://lists.sourceforge.net/lists/listinfo/emc-users >> >> >> >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
