Re: IBM buys Linux giant Red Hat

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Am Freitag, 2. November 2018 schrieb Gene Heskett:
> On Friday 02 November 2018 03:55:53 Dr. Nikolaus Klepp wrote:
> 
> > Am Sonntag, 28. Oktober 2018 schrieb Gene Heskett:
> > > On Sunday 28 October 2018 16:57:42 andre_debian@xxxxxxxxxxxxxx wrote:
> > > > www.engadget.com/2018/10/28/ibm-buys-red-hat/
> > > >
> > > > Is it a good new ?
> > > > Can this new make reviving Linux in the public market,
> > > > or only in the professional cloud market ?
> > > >
> > > > André
> > >
> > > Best question of the year.
> > >
> > > Next best is what to become of amanda? Amanda was just bought by
> > > BETSOL, whomever they might be, and they've sent one of their folks
> > > to the amanda list to quell the talk of a fork. But so far all we've
> > > seen is talk, and the users, including me who has been using it for
> > > nearly 20 years, are getting nervous. They haven't even put the lead
> > > maintainer on their payroll, and the undertones are rising in
> > > volume.
> > >
> > > I suppose at some point, debian will be an acquisition target as the
> > > commercial folks see it as something they can do a Red Hat with when
> > > Red Hat spun the Fedora as a free red hat, but they as expected used
> > > the fedora users as lab rats, trying new ways that often didn't work
> > > all that well. So I gave them feedback until I was tired of a half
> > > broken system all the time, and in about 2006 LinuxCNC was made as a
> > > respin of Ubuntu, but that petered out and went to debian in about
> > > 2012.  Where it still is, while our developers are busting butt
> > > trying to get the performance needed out rt-prempt patches for the
> > > later 64 bit kernels, which are in fact sloths compared to the 32
> > > bit patched versions in the 3.2.x releases. Much research at
> > > restoring that has been done, but its not yet been good enough to be
> > > accepted into mainline.
> > >
> > > Steven R. has been a frequent contributer to the linux-rt list for
> > > quite a while, and here is his off the cuff talk on it from a couple
> > > days back, basically issueing you can and you cant's to the rest of
> > > the developers as they code up new pieces for the kernel:
> > >
> > > <https://www.youtube.com/watch?v=BxJm-Ujipcg>
> > >
> > > There are some folks from red hat there on that list too.
> > >
> > > Make of it what you can. IBM, like Dell, has over the last 2 decades
> > > made some quality hardware. So I expect the cash infusion may allow
> > > some of the oldtimers in North Carolina to retire, and new blood
> > > will be brought on board, not necessarily from the ranks. What
> > > effect, good or bad, that will have remains to be seen.  Watching
> > > the stock market for fresh RHAT activity might be educational.
> >
> > Hi Gene!
> >
> > I'm relieved that I'm nit the only one struggling with linux-rt - my
> > latency numbers are horrible, no matter what hardware I use. But at
> > least I managed to get linuxcnc + preempt-rt + trinity working on my
> > raspberrypi3+. If you are interested, I can upload a rpi image for
> > testing :-)
> >
> > Nik
> 
> Nik. yes I'd be interested in that, although I am ATM, down one of my 
> other machines & have about 75% of the stuff ordered to put the two 
> BoB's in a separate box with hopefully better psu's. A $3 buck regulator 
> died a horrible death, spitting epoxy off the top of the chip, and 
> putting 35 volts on the 5 volt BoB supply buss for the few millisecs of 
> the death throes.  But the big lathe, running on an r-pi-3b is working 
> well. But any improvements in latency would be appreciated. .075 
> milliseconds on the servo-thread is tolerable, but its pretty wide in 
> terms of following error.
> 
> 
> I've 32Gb sd's to put it on.
> 
> 

Hi Gene!

I finally managed to upload the compressed image.  :-)

http://samhain.5gbfree.com/rpi3_tde_linuxcnc_rt_2018.11.06.img.xz.md5
http://samhain.5gbfree.com/rpi3_tde_linuxcnc_rt_2018.11.06.img.xz

$ md5sum rpi3_tde_linuxcnc_rt_2018.11.06.img.xz
2edd56042688bbb73639f76ad6fc9dce  

Imagesize is ~ 1.6G (1742714332 bytes) compressed or ~ 7G uncomressed.
TDE: English (default) / German, autologin as "pi"

In folder "~pi/linuxcnc-dev/" you'll find:
- rpi-hal_gpio-calculator.sh : my tool to calculate the masks for gpio-stuff
- linux : kernelesource
- linuxcnc-dev : linuxcnc sources, compiled for RIP
- linuxcnc : startscript for linuxcnc (also linked on desktop)
- latency-histogram: same for latency-histogram

Linuxcnc config called "RaspberryPi/rpi3b-2050vel" is my testconfig.

The kernel and kernel parameters are from http://wiki.linuxcnc.org/cgi-bin/wiki.pl?RPi3BPreemptRT , but I'm not sure if they are the holy grale. Currently I am compiling a stripped down kernel (maybe that will work better).

Oh, I disabled bluetooth and wifi.


Enjoy 

Nik




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