From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7B2BCC433B4 for ; Thu, 8 Apr 2021 14:25:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3E0DF6101B for ; Thu, 8 Apr 2021 14:25:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231867AbhDHOZr (ORCPT ); Thu, 8 Apr 2021 10:25:47 -0400 Received: from mga11.intel.com ([192.55.52.93]:22056 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231672AbhDHOZp (ORCPT ); Thu, 8 Apr 2021 10:25:45 -0400 IronPort-SDR: fr1wVnwWdAEwXuvtDMRiyflqveukeTo/SPwHJVG+EymgvjV7oFMQnQQp/yUpBNNkJUNtvtPRJM MCBycSbAUbog== X-IronPort-AV: E=McAfee;i="6000,8403,9948"; a="190348973" X-IronPort-AV: E=Sophos;i="5.82,206,1613462400"; d="scan'208";a="190348973" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Apr 2021 07:25:34 -0700 IronPort-SDR: 9MLeb5McO4R09T4BOpjpHvg7IV6CfBDy4LORwwBwHqgfqEUazcGSRMbhbvg5A5FoNfLDPtVI23 3iQCqnuQ1dSQ== X-IronPort-AV: E=Sophos;i="5.82,206,1613462400"; d="scan'208";a="458844929" Received: from tassilo.jf.intel.com ([10.54.74.11]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Apr 2021 07:25:34 -0700 Date: Thu, 8 Apr 2021 07:25:33 -0700 From: Andi Kleen To: "Bayduraev, Alexey V" Cc: Arnaldo Carvalho de Melo , Jiri Olsa , Namhyung Kim , Alexander Shishkin , Peter Zijlstra , Ingo Molnar , linux-kernel , Adrian Hunter , Alexei Budankov , Alexander Antonov Subject: Re: [PATCH v4 09/12] perf record: document parallel data streaming mode Message-ID: <20210408142533.GF3762101@tassilo.jf.intel.com> References: <6c15adcb-6a9d-320e-70b5-957c4c8b6ff2@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > +--threads=:: > +Write collected trace data into several data files using parallel threads. > + value can be user defined list of masks. Masks separated by colon > +define cpus to be monitored by a thread and affinity mask of that thread > +is separated by slash. For example user specification like the following: > +/:/ specifies You need to be more clear on the exact syntax of a mask. Ideally some full examples too. > +parallel threads layout that consists of two threads with corresponding > +assigned cpus to be monitored. value can also be a string meaning > +predefined parallel threads layout: > + cpu - create new data streaming thread for every monitored cpu > + core - create new thread to monitor cpus grouped by a core > + socket - create new thread to monitor cpus grouped by a socket > + numa - create new threed to monitor cpus grouped by a numa domain > +Predefined layouts can be used on systems with large number of cpus in > +order not to spawn multiple per-cpu streaming threads but still avoid LOST > +events in data directory files. Option specified with no or empty value > +defaults to cpu layout. Masks defined or provided by the option value are > +filtered through the mask provided by -C option. > > >