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Questions tagged [preempt-rt]

PREEMPT_RT is the real-time patch for the Linux kernel

PREEMPT_RT is a real-time patch aiming at reducing the maximum latency experienced by tasks running on the Linux kernel. Some parts of the patch have been merged into the mainline kernel from time to time. The development is sponsored by the Linux Foundation under the Real Time Linux collaborative project.

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Is RTOS effective for cloud/edge computing?

I'm currently working building and implementing robot control system using cellular system(4G or 5G).I am thinking of using RTOS in order to reduce processing time in server. The server receive request from the robot and response to it. Through the…
Murchadh
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Normal RHEL and PREEMPT_RT patches on same system ? is it possible

Im new to PREEMPT_RT patches, so i was wondering if i can install RHEL and PREEMPT_RT patches in same system, like if one of the core can run PREEMPT_RT s and other run RHEL so i can do complex time critical tasks on PREEMPT_RT and give a GUI on…
Altris
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Deadlock phenomenon even when PTHREAD_PRIO_PROTECT attribute is set to mutexes

I am trying to make a realtime interprocess communication module. In order to avoid unbounded priority inversion, deadlock, and chain blocking, I set PTHREAD_PRIO_PROTECT to each mutex. below is how each mutex is…
BabySWEngineer
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how to test effectiveness of preempt_rt patch?

I'm doing a study to compare the linux default kernel with the kernel patched with preempt_rt. I used a lot of tools (stress-ng, T-Sui, CPU burn, cycletest) to check the effectiveness of the patch. But I can see that the default kernel does already…
MaMa
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Is it safe to use boost provided shared memory and rt_signal (provided in linux) for realtime system?

I am currently working with building realtime IPC system. I am trying to build a realtime system free of all undeterministic components. I try to setup IPC based on shared memory model. Is it safe to use managed_shared_memory from boost library to…
BabySWEngineer
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Linux interrupt notification to user-space

I am using Linux kernel with preempt-rt patch, I did a a simple test to measure time between interrupt and notification of the interrupt to userspace. The idea is quite simple I have a module, that implements a read: static ssize_t my_read(struct…
ieio
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Check Linux kernel is realtime or not

I have installed Linux kernel 4.6 with rt patch and after uname -a it shows rt and PREEMPT but I have to prove by writing application so I have come with idea as below. I will make sleep for five milliseconds wake up and check hardware time and…
RPK
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using BCM2835 with RT-PREEMPT kernel

I am making a project which send out 40khz signal from antenna. I have found the signal is not too accurate so I have decided to try a real-time kernel. I run Raspbian Jessie on my Raspberry-Pi 2B. After clean install, the script run without any…
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