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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 F19C6C4320E for ; Wed, 11 Aug 2021 10:10:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C8C0260D07 for ; Wed, 11 Aug 2021 10:10:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237030AbhHKKLP (ORCPT ); Wed, 11 Aug 2021 06:11:15 -0400 Received: from mga17.intel.com ([192.55.52.151]:17186 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237034AbhHKKLJ (ORCPT ); Wed, 11 Aug 2021 06:11:09 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10072"; a="195363667" X-IronPort-AV: E=Sophos;i="5.84,311,1620716400"; d="scan'208";a="195363667" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Aug 2021 03:10:45 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,311,1620716400"; d="scan'208";a="506890985" Received: from ahunter-desktop.fi.intel.com ([10.237.72.174]) by fmsmga004.fm.intel.com with ESMTP; 11 Aug 2021 03:10:25 -0700 From: Adrian Hunter To: Arnaldo Carvalho de Melo Cc: Jiri Olsa , linux-kernel@vger.kernel.org Subject: [PATCH V2 4/6] perf tools: Amend dlfilter documentation wrt library dependencies Date: Wed, 11 Aug 2021 13:10:34 +0300 Message-Id: <20210811101036.17986-5-adrian.hunter@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210811101036.17986-1-adrian.hunter@intel.com> References: <20210811101036.17986-1-adrian.hunter@intel.com> Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Like all locally-built programs, dlfilters may need to be re-built if shared libraries they use change. Also there may be unexpected results if the dfilter uses different versions of the shared libraries that perf uses. Note those things in the documentation. Signed-off-by: Adrian Hunter --- tools/perf/Documentation/perf-dlfilter.txt | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tools/perf/Documentation/perf-dlfilter.txt b/tools/perf/Documentation/perf-dlfilter.txt index ece07509d1f7..594f5a5a0c9e 100644 --- a/tools/perf/Documentation/perf-dlfilter.txt +++ b/tools/perf/Documentation/perf-dlfilter.txt @@ -246,6 +246,14 @@ To use the filter with perf script: perf script --dlfilter dlfilter-example.so +NOTES +----- + +The dlfilter .so file will be dependent on shared libraries. If those change, +it may be necessary to rebuild the .so. Also there may be unexpected results +if the .so uses different versions of the shared libraries that perf uses. +Versions can be checked using the ldd command. + SEE ALSO -------- linkperf:perf-script[1] -- 2.17.1