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3
votes
1answer
309 views

Using sched_rt_period_us for setting maximum time between task calls of order of 10ms

I realize sched_rt_period_us and sched_rt_runtime_us are meant to prevent freezing the system in case of runaway RT task. I wonder though, if it's possible to use a small value of sched_rt_period_us ...
2
votes
1answer
157 views

Why isn't the -rt (RT-Preempt) kernel patch included by default in the mainline kernel?

According to https://rt.wiki.kernel.org/index.php/RT_PREEMPT_HOWTO , the RT-Preempt patch converts Linux into a fully preemptible kernel. The magic is done by: Making in-kernel locking-primitives ...
2
votes
1answer
129 views

Chrony 506 Cannot talk to daemon

I'm having trouble configuring chrony to sync the time between my raspberry pi and a desktop computer in an isolated network. My raspberry pi's chrony.config file looks like this: server master ...
2
votes
0answers
195 views

how to stop kernel threads preempting real time user space processes?

I created some processes in user space and tried to visualize its working in kernelshark with the trace recorded using trace-cmd. But kernel processes like the ones shown below are preempting my ...
2
votes
0answers
72 views

Which counter generates timer interrupts?

I did a iotop to observe the interrupts on my computer. This is the interrupt shown most often. 0 [PIC-edge time] 247 Ints/s (max: 389) I believe it's the timer interrupt, well since ...
2
votes
0answers
393 views

Can I apply real time Linux kernel patch on Android kernel?

I would like to apply real time patch on the Android kernel (given I've found Kernel patch for corresponding Kernel version). Is it possible or should I create a patch specifically for the purpose of ...
1
vote
0answers
388 views

MPlayer benchmarking - realtime FPS counter

I was trying to use MPlayer as a simple benchmarking tools and I need it to show the real time FPS counter, either on the console or on the video playback itself. I googled around and I stumbled ...
1
vote
0answers
343 views

error: implicit declaration of function ‘rt_dev_socket’

The developer says: http://comments.gmane.org/gmane.linux.real-time.rtnet.user/2546 Now how can I tell the Makefile to look for headers in /usr/local/rtnet/include respectively ...
0
votes
0answers
15 views

The latest stable RT patch version of linux kernel 2.6.31

I want to get the lastest stable RT patch version for linux kernel 2.6.31. But I was confused when looking it up at kernel.org. I saw that: patch-2.6.31.6-rt19.gz last modified was on 10-Nov-2009 ...
0
votes
0answers
66 views

Simulation Real Time Network - Omnet++ and Xenomai

I'm a completely beginner. I'm studying Real Time Operating System and in particular Real Time networks. Does somebody know if Omnet++ is good to emulate Real Time Network? Does Omnet++ work on ...