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=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 71C8CC433E0 for ; Thu, 28 May 2020 12:09:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 51D3921548 for ; Thu, 28 May 2020 12:09:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389633AbgE1MJm (ORCPT ); Thu, 28 May 2020 08:09:42 -0400 Received: from mga17.intel.com ([192.55.52.151]:6224 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388907AbgE1MJe (ORCPT ); Thu, 28 May 2020 08:09:34 -0400 IronPort-SDR: vU7hcmqVRbRfhWXx85hq7R6Iv3zD2Fx5XbjaXiWd2KBz6Z4EZBqkk10ejJr7wQ4KAreiwr0Oe5 mCnfjzkNDmRQ== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 May 2020 05:09:34 -0700 IronPort-SDR: VEcnEG7uhUim81Ar03elcl/rsp5cTkb8WUc52CY2Kg38HbQ875GTEJJmcEBHGXPgEAyVI1jjTc aYRxD2O/twrQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,444,1583222400"; d="scan'208";a="270831810" Received: from ahunter-desktop.fi.intel.com ([10.237.72.157]) by orsmga006.jf.intel.com with ESMTP; 28 May 2020 05:09:32 -0700 From: Adrian Hunter To: Arnaldo Carvalho de Melo Cc: Jiri Olsa , Andi Kleen , linux-kernel@vger.kernel.org, Mathieu Poirier Subject: [PATCH 2/2] perf intel-pt: Refine kernel decoding only warning message Date: Thu, 28 May 2020 15:08:59 +0300 Message-Id: <20200528120859.21604-2-adrian.hunter@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200528120859.21604-1-adrian.hunter@intel.com> References: <20200528120859.21604-1-adrian.hunter@intel.com> Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Stop the message displaying when user space is not being traced. Example: Prerequisites: sudo setcap "cap_sys_rawio,cap_sys_admin,cap_sys_ptrace,cap_syslog,cap_ipc_lock=ep" ~/bin/perf sudo chmod +r /proc/kcore Before: $ perf record --no-switch-events --kcore -a -e intel_pt//k -- sleep 0.001 Warning: Intel Processor Trace decoding will not be possible except for kernel tracing! [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.838 MB perf.data ] After: $ perf record --no-switch-events --kcore -a -e intel_pt//k -- sleep 0.001 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 1.068 MB perf.data ] $ sudo chmod go-r /proc/kcore $ sudo setcap -r ~/bin/perf Signed-off-by: Adrian Hunter --- tools/perf/arch/x86/util/intel-pt.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/perf/arch/x86/util/intel-pt.c b/tools/perf/arch/x86/util/intel-pt.c index 3fc547769707..9fb137282dc8 100644 --- a/tools/perf/arch/x86/util/intel-pt.c +++ b/tools/perf/arch/x86/util/intel-pt.c @@ -879,7 +879,8 @@ static int intel_pt_recording_options(struct auxtrace_record *itr, * per-cpu with no sched_switch (except workload-only). */ if (!ptr->have_sched_switch && !perf_cpu_map__empty(cpus) && - !target__none(&opts->target)) + !target__none(&opts->target) && + !intel_pt_evsel->core.attr.exclude_user) ui__warning("Intel Processor Trace decoding will not be possible except for kernel tracing!\n"); return 0; -- 2.17.1