The rtla(1) is a meta-tool that includes a set of commands that aims to analyze the real-time properties of Linux. But instead of testing Linux as a black box, rtla leverages kernel tracing capabilities to provide precise information about the properties and root causes of unexpected results. To start, it presents an interface to the osnoise and timerlat tracers. In the future, it will also serve as home to the rtsl [1] and other latency/noise tracers. The first five patches are a re-send of [2] that enable multiple instances for osnoise/timerlat tracers. They are required to run the -T option - to save a trace with osnoise: events for debugging. The next seven patches are rtla, rtla osnoise, and rtla timerlat. The following patches are the man pages for the tools. To compile rtla on fedora you need: $ git clone git://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git $ cd libtraceevent/ $ make $ sudo make install $ cd .. $ git clone git://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git $ cd libtracefs/ $ make $ sudo make install $ cd .. $ sudo dnf install asciidoc xmlto procps-devel $ cd $linux/tools/tracing/rtla/ $ make $ sudo make install This tool was be discussed at the RT-MC during LPC2021. [1] rtsl: https://github.com/bristot/rtsl/ [2] https://lore.kernel.org/lkml/cover.1628775552.git.bristot@xxxxxxxxxx/ [3] https://youtu.be/cZUzc0U1jJ4 Changes from v2: - Fix the miss conception of the "size" for kernel histograms (Steven/Tom) - Change the --skip-zeros to --with-zeros option as the former is better for humans (and the latter for computers to plot charts). - A lot of checkpatch fixes for the user-space part. Changes from v1: - Fixes -t options on osnoise tracers (-t means --trace for all tools now) - Fixes --bucket-size references (not --bucket_size) Daniel Bristot de Oliveira (19): trace/osnoise: Do not follow tracing_cpumask trace/osnoise: Split workload start from the tracer start trace/osnoise: Use start/stop_per_cpu_kthreads() on osnoise_cpus_write() trace/osnoise: Support a list of trace_array *tr trace/osnoise: Allow multiple instances of the same tracer rtla: Real-Time Linux Analysis tool rtla: Helper functions for rtla rtla: Add osnoise tool rtla/osnoise: Add osnoise top mode rtla/osnoise: Add the hist mode rtla: Add timerlat tool and timelart top mode rtla/timerlat: Add timerlat hist mode rtla: Add Documentation rtla: Add rtla osnoise man page rtla: Add rtla osnoise top documentation rtla: Add rtla osnoise hist documentation rtla: Add rtla timerlat documentation rtla: Add rtla timerlat top documentation rtla: Add rtla timerlat hist documentation kernel/trace/trace_osnoise.c | 410 ++++++--- tools/tracing/rtla/Documentation/Makefile | 223 +++++ .../tracing/rtla/Documentation/asciidoc.conf | 118 +++ .../rtla/Documentation/manpage-base.xsl | 35 + .../rtla/Documentation/manpage-normal.xsl | 13 + .../rtla/Documentation/rtla-osnoise-hist.txt | 117 +++ .../rtla/Documentation/rtla-osnoise-top.txt | 98 ++ .../rtla/Documentation/rtla-osnoise.txt | 68 ++ .../rtla/Documentation/rtla-timerlat-hist.txt | 162 ++++ .../rtla/Documentation/rtla-timerlat-top.txt | 181 ++++ .../rtla/Documentation/rtla-timerlat.txt | 65 ++ tools/tracing/rtla/Documentation/rtla.txt | 56 ++ tools/tracing/rtla/Documentation/utils.mk | 144 +++ tools/tracing/rtla/Makefile | 71 ++ tools/tracing/rtla/src/osnoise.c | 837 ++++++++++++++++++ tools/tracing/rtla/src/osnoise.h | 87 ++ tools/tracing/rtla/src/osnoise_hist.c | 783 ++++++++++++++++ tools/tracing/rtla/src/osnoise_top.c | 567 ++++++++++++ tools/tracing/rtla/src/rtla.c | 87 ++ tools/tracing/rtla/src/timerlat.c | 72 ++ tools/tracing/rtla/src/timerlat.h | 4 + tools/tracing/rtla/src/timerlat_hist.c | 780 ++++++++++++++++ tools/tracing/rtla/src/timerlat_top.c | 581 ++++++++++++ tools/tracing/rtla/src/trace.c | 219 +++++ tools/tracing/rtla/src/trace.h | 27 + tools/tracing/rtla/src/utils.c | 433 +++++++++ tools/tracing/rtla/src/utils.h | 56 ++ 27 files changed, 6173 insertions(+), 121 deletions(-) create mode 100644 tools/tracing/rtla/Documentation/Makefile create mode 100644 tools/tracing/rtla/Documentation/asciidoc.conf create mode 100644 tools/tracing/rtla/Documentation/manpage-base.xsl create mode 100644 tools/tracing/rtla/Documentation/manpage-normal.xsl create mode 100644 tools/tracing/rtla/Documentation/rtla-osnoise-hist.txt create mode 100644 tools/tracing/rtla/Documentation/rtla-osnoise-top.txt create mode 100644 tools/tracing/rtla/Documentation/rtla-osnoise.txt create mode 100644 tools/tracing/rtla/Documentation/rtla-timerlat-hist.txt create mode 100644 tools/tracing/rtla/Documentation/rtla-timerlat-top.txt create mode 100644 tools/tracing/rtla/Documentation/rtla-timerlat.txt create mode 100644 tools/tracing/rtla/Documentation/rtla.txt create mode 100644 tools/tracing/rtla/Documentation/utils.mk create mode 100644 tools/tracing/rtla/Makefile create mode 100644 tools/tracing/rtla/src/osnoise.c create mode 100644 tools/tracing/rtla/src/osnoise.h create mode 100644 tools/tracing/rtla/src/osnoise_hist.c create mode 100644 tools/tracing/rtla/src/osnoise_top.c create mode 100644 tools/tracing/rtla/src/rtla.c create mode 100644 tools/tracing/rtla/src/timerlat.c create mode 100644 tools/tracing/rtla/src/timerlat.h create mode 100644 tools/tracing/rtla/src/timerlat_hist.c create mode 100644 tools/tracing/rtla/src/timerlat_top.c create mode 100644 tools/tracing/rtla/src/trace.c create mode 100644 tools/tracing/rtla/src/trace.h create mode 100644 tools/tracing/rtla/src/utils.c create mode 100644 tools/tracing/rtla/src/utils.h -- 2.31.1
