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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
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