realtime:documentation:howto:tools:rtla
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realtime:documentation:howto:tools:rtla [2024/09/30 16:31] costa.shul tools |
realtime:documentation:howto:tools:rtla [2025/03/18 09:07] (current) costa.shul [More Information] libtracefs |
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| * [[https://docs.kernel.org/tools/rtla/rtla-osnoise.html|rtla osnoise]] provides information about operating system noise measured with [[https://docs.kernel.org/trace/osnoise-tracer.html|osnoise tracer]]. It dispatches kernel threads per CPU to measure various sources of interference during execution, such as preemption, softirq, and IRQs. Modes: [[https://docs.kernel.org/tools/rtla/rtla-osnoise-top.html|top]], [[https://docs.kernel.org/tools/rtla/rtla-osnoise-hist.html|hist]]. | * [[https://docs.kernel.org/tools/rtla/rtla-osnoise.html|rtla osnoise]] provides information about operating system noise measured with [[https://docs.kernel.org/trace/osnoise-tracer.html|osnoise tracer]]. It dispatches kernel threads per CPU to measure various sources of interference during execution, such as preemption, softirq, and IRQs. Modes: [[https://docs.kernel.org/tools/rtla/rtla-osnoise-top.html|top]], [[https://docs.kernel.org/tools/rtla/rtla-osnoise-hist.html|hist]]. | ||
| - | * [[https://docs.kernel.org/tools/rtla/rtla-hwnoise.html|rtla hwnoise]] detects and quantifies hardware-related noise with [[https://docs.kernel.org/trace/osnoise-tracer.html|osnoise tracer]]. By disabling interrupts and scheduling of threads, only non-maskable interrupts and hardware-related noise are analyzed. | + | * [[https://docs.kernel.org/tools/rtla/rtla-hwnoise.html|rtla hwnoise]] detects and quantifies hardware-related noise with [[https://docs.kernel.org/trace/osnoise-tracer.html|osnoise tracer]]. By disabling interrupts with [[https://elixir.bootlin.com/linux/v6.12.6/A/ident/OSN_IRQ_DISABLE|OSNOISE_IRQ_DISABLE]] and scheduling of threads, only non-maskable interrupts and hardware-related noise are analyzed. |
| Each of these commands has various options for configuration, such as setting tracer periods, runtimes, thresholds, scheduling parameters, trace events and triggers, and more. These commands offer different ways to analyze and understand the real-time properties and noise sources in the Linux operating system. | Each of these commands has various options for configuration, such as setting tracer periods, runtimes, thresholds, scheduling parameters, trace events and triggers, and more. These commands offer different ways to analyze and understand the real-time properties and noise sources in the Linux operating system. | ||
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| [[https://www.youtube.com/watch?v=oLTRVcJ7_as|🎥 rtla timerlat: Debugging Real-time Linux Scheduling Latency, video]]\\ | [[https://www.youtube.com/watch?v=oLTRVcJ7_as|🎥 rtla timerlat: Debugging Real-time Linux Scheduling Latency, video]]\\ | ||
| [[https://elixir.bootlin.com/linux/latest/source/tools/tracing/rtla|user mode source]]\\ | [[https://elixir.bootlin.com/linux/latest/source/tools/tracing/rtla|user mode source]]\\ | ||
| - | [[https://elixir.bootlin.com/linux/latest/source/kernel/trace/trace_osnoise.c|trace_osnoise.c - kernel mode source]] | + | [[https://elixir.bootlin.com/linux/latest/source/kernel/trace/trace_osnoise.c#L1531|trace_osnoise.c: trace_sample_threshold() - kernel mode source]]\\ |
| + | RTLA uses [[https://man7.org/linux/man-pages/man3/libtracefs.3.html|libtracefs]] | ||
realtime/documentation/howto/tools/rtla.1727713915.txt.gz · Last modified: 2024/09/30 16:31 by costa.shul
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