linux-kernel - [PATCH 0/8] rtla improvements

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Message-Id: <cover.1683827510.git.bristot@kernel.org>
Date:   Thu, 11 May 2023 20:04:18 +0200
From:   Daniel Bristot de Oliveira <bristot@...nel.org>
To:     linux-trace-devel@...r.kernel.org,
        Steven Rostedt <rostedt@...dmis.org>
Cc:     linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Juri Lelli <juri.lelli@...hat.com>,
        William White <chwhite@...hat.com>,
        Daniel Bristot de Oliveira <bristot@...nel.org>
Subject: [PATCH 0/8] rtla improvements

This is a series of improvements for rtla, mainly as a result of our
daily usage of the tool debugging problems at red hat.

The cgroup support and house keeping options are from our usage
of the tool debugging containers.

The auto-analysis overhead reduction is needed when we go to
large boxes - but it is really hand in practice, as it gives an idea
of the problem without having to look at the trace.

Finally, running hwnoise 100 % of CPU time might cause some systems
to slow down too much. Reduce its utilization to 75% by default to
avoid problems for people using it for the first time.

Daniel Bristot de Oliveira (8):
  rtla: Add -C cgroup support
  rtla: Add --house-keeping option
  rtla: Change monitored_cpus from char * to cpu_set_t
  rtla: Automatically move rtla to a house-keeping cpu
  rtla/timerlat: Give timerlat auto analysis its own instance
  rtla/timerlat_hist: Add auto-analysis support
  rtla: Start the tracers after creating all instances
  rtla/hwnoise: Reduce runtime to 75%

 Documentation/tools/rtla/common_options.rst   |   8 +
 .../tools/rtla/common_timerlat_aa.rst         |   7 -
 .../tools/rtla/rtla-timerlat-hist.rst         |   7 +-
 .../tools/rtla/rtla-timerlat-top.rst          |   7 +
 tools/tracing/rtla/src/osnoise_hist.c         |  90 +++++-
 tools/tracing/rtla/src/osnoise_top.c          |  83 +++++-
 tools/tracing/rtla/src/timerlat_aa.c          |  35 ++-
 tools/tracing/rtla/src/timerlat_aa.h          |   5 +-
 tools/tracing/rtla/src/timerlat_hist.c        | 139 +++++++--
 tools/tracing/rtla/src/timerlat_top.c         | 127 +++++++--
 tools/tracing/rtla/src/utils.c                | 266 ++++++++++++++++--
 tools/tracing/rtla/src/utils.h                |   5 +
 12 files changed, 684 insertions(+), 95 deletions(-)

-- 
2.38.1