After adding the osnoise/options file, a set of on/off options came to my mind, most based on discussions while debugging problems with Juri and Clark. The PANIC_ON_STOP option facilitates the vmcore generation to aid in the latency analysis using a crash dump. The OSNOISE_PREEMPT_DISABLE and OSNOISE_IRQ_DISABLE options refine the type of noise that the osnoise tracer detects, allowing the tool to measure only IRQ-related noise, or NMI/HW-related noise, respectively. Each patch has a description of the options and the last patch documents them in the osnoise documentation file. [1] https://lore.kernel.org/r/cover.1668692096.git.bristot@xxxxxxxxxx/ Changes from V3: - Fix documentation (Bagas Sanjaya) - Optmize the preempt disable option (Steven Rostedt) Changes from v2: - rebased on top of linux-trace.git/ftrace/core - removed the patches already added to the ftrace/core Changes from v1: - Changed the cover letter topic - Add Acked-by Masami to the first patch - Add the PANIC_ON_STOP option - Add the OSNOISE_PREEMPT_DISABLE and OSNOISE_IRQ_DISABLE options - Improved the documentation Daniel Bristot de Oliveira (3): tracing/osnoise: Add PANIC_ON_STOP option tracing/osnoise: Add preempt and/or irq disabled options Documentation/osnoise: Add osnoise/options documentation Documentation/trace/osnoise-tracer.rst | 20 +++++++++- kernel/trace/trace_osnoise.c | 52 +++++++++++++++++++++++--- 2 files changed, 65 insertions(+), 7 deletions(-) -- 2.32.0
