Was: Allow osnoise tracer to run without workload [1] 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. So, this series now goes beyond running osnoise without a workload by adding a set of practical options using the new osnoise/options file. The [NO_]OSNOISE_WORKLOAD option allows the tracer to be dispatched without workload, making the osnoise: tracepoints to become generic events to measure the execution time of *any* task on Linux. 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 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 documentationa Daniel Bristot de Oliveira (6): tracing/osnoise: Fix duration type tracing/osnoise: Add osnoise/options file tracing/osnoise: Add OSNOISE_WORKLOAD option 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 | 32 +++- kernel/trace/trace_osnoise.c | 242 +++++++++++++++++++++++-- 2 files changed, 261 insertions(+), 13 deletions(-) -- 2.32.0
