linux-kernel - [GIT PULL] tracing tools: Updates for v6.17

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Message-ID: <20250731104542.0878d70f@gandalf.local.home>
Date: Thu, 31 Jul 2025 10:45:42 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: LKML <linux-kernel@...r.kernel.org>, Tomas Glozar <tglozar@...hat.com>,
 John Kacur <jkacur@...hat.com>, "Luis Claudio R. Goncalves"
 <lgoncalv@...hat.com>, Clark Williams <williams@...hat.com>
Subject: [GIT PULL] tracing tools: Updates for v6.17

Linus,

tracing tools changes for 6.17:

- Introduce enum timerlat_tracing_mode

  Now that BPF based sampling has been added to timerlat, add an enum to
  represent which mode timerlat is running in.

- Add action on timelat threshold feature

  A new option, --on-threshold, is added, taking an argument
  that further specifies the action. Actions added in this patch are:

  - trace[,file=<filename>]: Saves tracefs buffer, optionally taking a
          filename.
  - signal,num=<sig>,pid=<pid>: Sends signal to process. "parent" might
          be specified instead of number to send signal to parent process.
  - shell,command=<command>: Execute shell command.

- Allow resuming tracing in timerlat bpf

  rtla-timerlat BPF program uses a global variable stored in a .bss section to
  store whether tracing has been stopped. Map it to allow it to resume tracing
  after it has been stopped.

- Add continue action to timerlat

  Introduce option to resume tracing after a latency threshold overflow.  The
  option is implemented as an action named "continue".

- Add action on end feature to timerlat

  Implement actions on end next to actions on threshold. A new option,
  --on-end is added, parallel to --on-threshold. Instead of being executed
  whenever a latency threshold is reached, it is executed at the end of the
  measurement.

- Have rtla tests check output with grep

  Add argument to the check command in the test suite that takes a regular
  expression that the output of rtla command is checked against. This allows
  testing for specific information in rtla output in addition to checking the
  return value.

- Add tests for timerlat actions

- Update the documentation for the new features

Please pull the latest trace-tools-v6.17 tree, which can be found at:

  git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace.git
trace-tools-v6.17

Tag SHA1: 97181ac099ee9e7ef9f5edf99a0ad1c1b5fab8cd
Head SHA1: a80db1f85774ae571b94077f65c5cd57467641d3

Tomas Glozar (11):
      rtla/timerlat: Introduce enum timerlat_tracing_mode
      rtla/timerlat: Add action on threshold feature
      rtla/timerlat_bpf: Allow resuming tracing
      rtla/timerlat: Add continue action
      rtla/timerlat: Add action on end feature
      rtla/tests: Check rtla output with grep
      rtla/tests: Add tests for actions
      rtla/tests: Limit duration to maximum of 10s
      Documentation/rtla: Add actions feature
      rtla/tests: Add grep checks for base test cases
      rtla/tests: Test timerlat -P option using actions

----
 .../tools/rtla/common_timerlat_options.rst         |  64 +++++
 tools/tracing/rtla/src/Build                       |   1 +
 tools/tracing/rtla/src/actions.c                   | 260 +++++++++++++++++++++
 tools/tracing/rtla/src/actions.h                   |  52 +++++
 tools/tracing/rtla/src/timerlat.bpf.c              |  13 +-
 tools/tracing/rtla/src/timerlat.c                  |  24 +-
 tools/tracing/rtla/src/timerlat.h                  |  24 +-
 tools/tracing/rtla/src/timerlat_bpf.c              |  13 ++
 tools/tracing/rtla/src/timerlat_bpf.h              |   3 +
 tools/tracing/rtla/src/timerlat_hist.c             | 140 ++++++++---
 tools/tracing/rtla/src/timerlat_top.c              | 165 ++++++++-----
 tools/tracing/rtla/tests/engine.sh                 |  21 +-
 tools/tracing/rtla/tests/hwnoise.t                 |  13 +-
 tools/tracing/rtla/tests/osnoise.t                 |  10 +-
 tools/tracing/rtla/tests/scripts/check-priority.sh |   8 +
 tools/tracing/rtla/tests/timerlat.t                |  45 +++-
 16 files changed, 732 insertions(+), 124 deletions(-)
 create mode 100644 tools/tracing/rtla/src/actions.c
 create mode 100644 tools/tracing/rtla/src/actions.h
 create mode 100755 tools/tracing/rtla/tests/scripts/check-priority.sh
---------------------------