26 Dec
2019
26 Dec
'19
1:15 p.m.
On Thursday 26 December 2019 15:23:11 Dr. Nikolaus Klepp wrote:
Its my understanding that it is being worked on. But I've been in the
shop getting my ticker rebuilt too, and this computer had a fire and had
to be rebuilt with a new mobo, cpu and memory, which occupied my time
between visits to the cath-lab, so I'm not exactly uptodate on that.
Couple months out of date, or more, I had the heart attack in late Sept.
Theoreticly fixed now, and I feel better than a year ago. So you, Nik,
are likely quite a bit closer to current than I. Please fill these
folks in where I blew it.
Anno domini 2019 Thu, 26 Dec 15:08:41 -0500
Gene Heskett scripsit:
That is highly dependant on the kernel. At the present time, the version
I built is about 25 fps faster than the raspbian kernel it replaces.
And even that is an older build.
On Thursday 26 December 2019 10:30:39 Michael
wrote:
One should also mention, that for a normal user a realtime kernel is a
bad idea, the GUI will not perform better.
On Thursday 26 December 2019 05:24:06 am Gene
Heskett wrote:
If you install the kernel src debs, you can do a make menuconfig,
which will allow you access to the kernels fine tuning, and one of
the option buried in the menu's is to turn on a config option call
preempt-rt or preempt-realtime. This changes the IRQ handling to
make the IRQ's be handled much quicker at the expense of making
other stuff wait a few microseconds. preempt-realtime kernel
Hi Gene,
You've mentioned realtime kernel before as being faster(/better?),
do you have a goto link/article that explains it for a mostly
uninformed about kernel person? There are
other, even better ways to do this but this one disturbs
the rest of the system less, and it puts those operations in the
users workspace. All other methods become a portion of the kernel
wom
And then there is RTAI, which gives a latrency of ~ 1/5th to 1/10th of
RT-PREEMPT. But it does not work on ARM :( I can search this, but with the amount of
bias/wrong/propaganda
you end up with now from google searches, I figured I’d ask
someone who actually knows…
The confusion reigns heavily because the rt developer group is
actually 2 or 3 parallel projects. All of which are working on
getting the version of the code they are working on good enough to
become the core the default build is based on. I am not an expert, I
simply git clone a version and if it works we've a winner, if not,
tag a newer one and try again. Development is moving at breakneck
speeds Nik
> > Thanks,
> > Michael
> >
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> Cheers, Gene Heskett
Cheers, Gene Heskett
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