0
votes
0answers
16 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 ...
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
1answer
373 views

Why CONFIG_NO_HZ is not set by default

In the Linux Kernel CONFIG_NO_HZ is not set. But an initial reading suggests that setting that option would be nice from a performance point of view. But reading some posts like this made me think ...
1
vote
1answer
392 views

Change of real time priority made no visible effect

we were trying to get the best result with software PWM on raspberry pi with Raspbian. We made a python script which starts PWM on a GPIO pin, and observed the results with the oscilloscope. It ...
4
votes
2answers
635 views

c++ programming on a Real-time linux OS

Is there any gotcha's programming RealTime C++ applications (user space and linux drivers) on RT linux kernel compare to a std linux kernel? The Linux RT patch applies changes to kernel scheduler, ...
-1
votes
1answer
687 views

Hurd vs Plan9 vs Linux vs eCos vs FreeRTOS what are the main differences specially with Hurd?

Hurd is actually not Unix nor Linux. But more superior says. Where Plan9 and Linux are in the range of Unix/Linux. eCos and FreeRTOS is also completely not unix/linux. What is the main differences ...