From patchwork Tue Jun 6 16:12:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Bristot de Oliveira X-Patchwork-Id: 13269429 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 E12F4C7EE29 for ; Tue, 6 Jun 2023 16:13:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238544AbjFFQNz (ORCPT ); Tue, 6 Jun 2023 12:13:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48304 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237776AbjFFQN1 (ORCPT ); Tue, 6 Jun 2023 12:13:27 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 92E9719BD; Tue, 6 Jun 2023 09:13:05 -0700 (PDT) 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 dfw.source.kernel.org (Postfix) with ESMTPS id 2DF4462DE6; Tue, 6 Jun 2023 16:13:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8CEEBC4339E; Tue, 6 Jun 2023 16:13:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1686067983; bh=SNMZc0L/b6GLmVD1yPrxAZQaDWAwMEPVbWJyNUZPapU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ISrLLMAQMED7jumB7rUxj4NLoUAL1EUyBok+B70FXLeTV8RbWw2YEyhDwpUUt2W+8 BSxK7qj0Xsy1sBuOEiYEIDscWsMI8kOhRR5UpQ1uYg9B2NN7A3Omlc1BfNFBZY0dvi 4brp+zhcc4iOG+YQwY906r240v+Ox0bb7YrQqkZA2AgpiYnVG/xEO7OM3wnAUf3T1a tC7uJTlisTSrjMOg93qS/eQVXTnpCtKJ4KNPzc+VxwQ0RwYF7suOc5KDTQFRGDOVrk M4xRJ0dhiRl0bQyu6vIGQpuwUPKNMeKGpLwXJPqYVcPlyuNBp7fyJKxA9iF59EasAc mSJfqaSQpNEEQ== From: Daniel Bristot de Oliveira To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Steven Rostedt Cc: linux-doc@vger.kernel.org, Juri Lelli , William White , Daniel Bristot de Oliveira , Masami Hiramatsu , Jonathan Corbet Subject: [PATCH V3 11/11] Documentation: Add tools/rtla timerlat -u option documentation Date: Tue, 6 Jun 2023 18:12:25 +0200 Message-Id: X-Mailer: git-send-email 2.38.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-trace-kernel@vger.kernel.org Add the -u/--user-thread option documentation for timerlat top/hist. Cc: Steven Rostedt Cc: Daniel Bristot de Oliveira Cc: Masami Hiramatsu Cc: Jonathan Corbet Signed-off-by: Daniel Bristot de Oliveira --- Documentation/tools/rtla/common_timerlat_options.rst | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/tools/rtla/common_timerlat_options.rst b/Documentation/tools/rtla/common_timerlat_options.rst index bacdea6de7a3..88506b397c2d 100644 --- a/Documentation/tools/rtla/common_timerlat_options.rst +++ b/Documentation/tools/rtla/common_timerlat_options.rst @@ -26,3 +26,10 @@ Set the /dev/cpu_dma_latency to *us*, aiming to bound exit from idle latencies. *cyclictest* sets this value to *0* by default, use **--dma-latency** *0* to have similar results. + +**-u**, **--user-threads** + + Set timerlat to run without a workload, and then dispatches user-space workloads + to wait on the timerlat_fd. Once the workload is awakes, it goes to sleep again + adding so the measurement for the kernel-to-user and user-to-kernel to the tracer + output.