34 Kernel image for real time #
The real-time kernel image is not necessarily better than a standard kernel. It is a different kernel tuned to a specific use case. The real-time kernel is tuned for lower latency at the cost of throughput. The real-time kernel is not recommended for general purpose use, but in our case, this is the recommended kernel for Telco Workloads where latency is a key factor.
There are four top features:
Deterministic execution:
Get greater predictability — ensure critical business processes complete in time, every time and deliver high-quality service, even under heavy system loads. By shielding key system resources for high-priority processes, you can ensure greater predictability for time-sensitive applications.
Low jitter:
The low jitter built upon the highly deterministic technology helps to keep applications synchronized with the real world. This helps services that need ongoing and repeated calculation.
Priority inheritance:
Priority inheritance refers to the ability of a lower priority process to assume a higher priority when there is a higher priority process that requires the lower priority process to finish before it can accomplish its task. SUSE Linux Enterprise Real Time solves these priority inversion problems for mission-critical processes.
Thread interrupts:
Processes running in interrupt mode in a general-purpose operating system are not preemptible. With SUSE Linux Enterprise Real Time, these interrupts have been encapsulated by kernel threads, which are interruptible, and allow the hard and soft interrupts to be preempted by user-defined higher priority processes.
In our case, if you have installed a real-time image like
SUSE Linux Micro RT, kernel real time is already installed. From the SUSE Customer Center, you can download the real-time kernel image.
