From patchwork Tue Jan 11 17:30:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Rostedt X-Patchwork-Id: 12710170 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3DBACC4167B for ; Tue, 11 Jan 2022 17:31:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344391AbiAKRbw (ORCPT ); Tue, 11 Jan 2022 12:31:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42894 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344419AbiAKRbW (ORCPT ); Tue, 11 Jan 2022 12:31:22 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 856ABC06175B; Tue, 11 Jan 2022 09:31:19 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 1ECA5B81C51; Tue, 11 Jan 2022 17:31:19 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D09F0C36AF5; Tue, 11 Jan 2022 17:31:18 +0000 (UTC) Received: from rostedt by gandalf.local.home with local (Exim 4.95) (envelope-from ) id 1n7KzO-0032IO-0s; Tue, 11 Jan 2022 12:31:18 -0500 Message-ID: <20220111173117.862493725@goodmis.org> User-Agent: quilt/0.66 Date: Tue, 11 Jan 2022 12:30:56 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Andrew Morton , Tao Zhou , Ingo Molnar , Tom Zanussi , Masami Hiramatsu , Juri Lelli , Clark Williams , John Kacur , Peter Zijlstra , Thomas Gleixner , Sebastian Andrzej Siewior , Daniel Bristot de Oliveira , linux-rt-users@vger.kernel.org, linux-trace-devel@vger.kernel.org Subject: [for-next][PATCH 25/31] rtla: Add rtla osnoise top documentation References: <20220111173030.999527342@goodmis.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org From: Daniel Bristot de Oliveira Man page for rtla osnoise top mode. Link: https://lkml.kernel.org/r/3dfdba589524498ee4a2cfe7a0b3ed18319d87db.1638182284.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 | 24 ++++++++ .../tools/rtla/common_osnoise_options.rst | 17 ++++++ .../tools/rtla/common_top_options.rst | 3 + Documentation/tools/rtla/rtla-osnoise-top.rst | 61 +++++++++++++++++++ 4 files changed, 105 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 diff --git a/Documentation/tools/rtla/common_options.rst b/Documentation/tools/rtla/common_options.rst new file mode 100644 index 000000000000..ea6529667e7c --- /dev/null +++ b/Documentation/tools/rtla/common_options.rst @@ -0,0 +1,24 @@ +**-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. + +**-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