From b1be48307de4ccb315036c58bb1363a93c27d188 Mon Sep 17 00:00:00 2001 From: Daniel Bristot de Oliveira Date: Fri, 10 Dec 2021 19:11:29 +0100 Subject: rtla: Add rtla osnoise top documentation Man page for rtla osnoise top mode. Link: https://lkml.kernel.org/r/445aa2173ca152fc2e68719e3c1a2547dd01efd3.1639158831.git.bristot@kernel.org Cc: Tao Zhou Cc: Ingo Molnar Cc: Tom Zanussi Cc: Masami Hiramatsu Cc: Juri Lelli Cc: Clark Williams Cc: John Kacur Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Sebastian Andrzej Siewior Cc: Daniel Bristot de Oliveira Cc: linux-rt-users@vger.kernel.org Cc: linux-trace-devel@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Daniel Bristot de Oliveira Signed-off-by: Steven Rostedt --- Documentation/tools/rtla/common_options.rst | 28 ++++++++++ .../tools/rtla/common_osnoise_options.rst | 17 ++++++ Documentation/tools/rtla/common_top_options.rst | 3 ++ Documentation/tools/rtla/rtla-osnoise-top.rst | 61 ++++++++++++++++++++++ 4 files changed, 109 insertions(+) create mode 100644 Documentation/tools/rtla/common_options.rst create mode 100644 Documentation/tools/rtla/common_osnoise_options.rst create mode 100644 Documentation/tools/rtla/common_top_options.rst create mode 100644 Documentation/tools/rtla/rtla-osnoise-top.rst (limited to 'Documentation/tools/rtla') diff --git a/Documentation/tools/rtla/common_options.rst b/Documentation/tools/rtla/common_options.rst new file mode 100644 index 000000000000..721790ad984e --- /dev/null +++ b/Documentation/tools/rtla/common_options.rst @@ -0,0 +1,28 @@ +**-c**, **--cpus** *cpu-list* + + Set the osnoise tracer to run the sample threads in the cpu-list. + +**-d**, **--duration** *time[s|m|h|d]* + + Set the duration of the session. + +**-D**, **--debug** + + Print debug info. + +**-t**, **--trace**\[*=file*] + + Save the stopped trace to [*file|osnoise_trace.txt*]. + +**-P**, **--priority** *o:prio|r:prio|f:prio|d:runtime:period* + + Set scheduling parameters to the osnoise tracer threads, the format to set the priority are: + + - *o:prio* - use SCHED_OTHER with *prio*; + - *r:prio* - use SCHED_RR with *prio*; + - *f:prio* - use SCHED_FIFO with *prio*; + - *d:runtime[us|ms|s]:period[us|ms|s]* - use SCHED_DEADLINE with *runtime* and *period* in nanoseconds. + +**-h**, **--help** + + Print help menu. diff --git a/Documentation/tools/rtla/common_osnoise_options.rst b/Documentation/tools/rtla/common_osnoise_options.rst new file mode 100644 index 000000000000..d556883e4e26 --- /dev/null +++ b/Documentation/tools/rtla/common_osnoise_options.rst @@ -0,0 +1,17 @@ +**-p**, **--period** *us* + + Set the *osnoise* tracer period in microseconds. + +**-r**, **--runtime** *us* + + Set the *osnoise* tracer runtime in microseconds. + +**-s**, **--stop** *us* + + Stop the trace if a single sample is higher than the argument in microseconds. + If **-T** is set, it will also save the trace to the output. + +**-S**, **--stop-total** *us* + + Stop the trace if the total sample is higher than the argument in microseconds. + If **-T** is set, it will also save the trace to the output. diff --git a/Documentation/tools/rtla/common_top_options.rst b/Documentation/tools/rtla/common_top_options.rst new file mode 100644 index 000000000000..f48878938f84 --- /dev/null +++ b/Documentation/tools/rtla/common_top_options.rst @@ -0,0 +1,3 @@ +**-q**, **--quiet** + + Print only a summary at the end of the session. diff --git a/Documentation/tools/rtla/rtla-osnoise-top.rst b/Documentation/tools/rtla/rtla-osnoise-top.rst new file mode 100644 index 000000000000..5d75d1394516 --- /dev/null +++ b/Documentation/tools/rtla/rtla-osnoise-top.rst @@ -0,0 +1,61 @@ +=================== +rtla-osnoise-top +=================== +----------------------------------------------- +Display a summary of the operating system noise +----------------------------------------------- + +:Manual section: 1 + +SYNOPSIS +======== +**rtla osnoise top** [*OPTIONS*] + +DESCRIPTION +=========== +.. include:: common_osnoise_description.rst + +**rtla osnoise top** collects the periodic summary from the *osnoise* tracer, +including the counters of the occurrence of the interference source, +displaying the results in a user-friendly format. + +The tool also allows many configurations of the *osnoise* tracer and the +collection of the tracer output. + +OPTIONS +======= +.. include:: common_osnoise_options.rst + +.. include:: common_top_options.rst + +.. include:: common_options.rst + +EXAMPLE +======= +In the example below, the **rtla osnoise top** tool is set to run with a +real-time priority *FIFO:1*, on CPUs *0-3*, for *900ms* at each period +(*1s* by default). The reason for reducing the runtime is to avoid starving +the rtla tool. The tool is also set to run for *one minute* and to display +a summary of the report at the end of the session:: + + [root@f34 ~]# rtla osnoise top -P F:1 -c 0-3 -r 900000 -d 1M -q + Operating System Noise + duration: 0 00:01:00 | time is in us + CPU Period Runtime Noise % CPU Aval Max Noise Max Single HW NMI IRQ Softirq Thread + 0 #59 53100000 304896 99.42580 6978 56 549 0 53111 1590 13 + 1 #59 53100000 338339 99.36282 8092 24 399 0 53130 1448 31 + 2 #59 53100000 290842 99.45227 6582 39 855 0 53110 1406 12 + 3 #59 53100000 204935 99.61405 6251 33 290 0 53156 1460 12 + +SEE ALSO +======== + +**rtla-osnoise**\(1), **rtla-osnoise-hist**\(1) + +Osnoise tracer documentation: + +AUTHOR +====== +Written by Daniel Bristot de Oliveira + +.. include:: common_appendix.rst -- cgit v1.2.3