On Thursday 26 December 2019 15:23:11 Dr. Nikolaus Klepp wrote: > Anno domini 2019 Thu, 26 Dec 15:08:41 -0500 > > Gene Heskett scripsit: > > On Thursday 26 December 2019 10:30:39 Michael wrote: > > > On Thursday 26 December 2019 05:24:06 am Gene Heskett wrote: > > > > 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? > > > > 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. > > One should also mention, that for a normal user a realtime kernel is a > bad idea, the GUI will not perform better. > 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. > > 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 > > > > > 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 > > 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 :( 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 Couple months out of date, or more, I had the heart attack in late Sept.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. > Nik > > > > Thanks, > > > Michael > > > > > > ------------------------------------------------------------------ > > >--- To unsubscribe, e-mail: > > > trinity-users-unsubscribe@xxxxxxxxxxxxxxxxxxxxxxxxxx For > > > additional commands, e-mail: > > > trinity-users-help@xxxxxxxxxxxxxxxxxxxxxxxxxx Read list messages > > > on the web archive: > > > http://trinity-users.pearsoncomputing.net/ Please remember not to > > > top-post: > > > http://trinity.pearsoncomputing.net/mailing_lists/#top-posting > > > > Cheers, Gene Heskett 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> --------------------------------------------------------------------- To unsubscribe, e-mail: trinity-users-unsubscribe@xxxxxxxxxxxxxxxxxxxxxxxxxx For additional commands, e-mail: trinity-users-help@xxxxxxxxxxxxxxxxxxxxxxxxxx Read list messages on the web archive: http://trinity-users.pearsoncomputing.net/ Please remember not to top-post: http://trinity.pearsoncomputing.net/mailing_lists/#top-posting
