From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Ahern Subject: Re: perf probe failed to find symbols - Date: Mon, 15 Dec 2014 20:52:41 -0700 Message-ID: <548FAC89.4010502@gmail.com> References: <050363D101EB63409B222217F4B02E781EC22E9F@G6W2492.americas.hpqcorp.net> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-pa0-f42.google.com ([209.85.220.42]:58255 "EHLO mail-pa0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750914AbaLPDwo (ORCPT ); Mon, 15 Dec 2014 22:52:44 -0500 Received: by mail-pa0-f42.google.com with SMTP id et14so13261486pad.1 for ; Mon, 15 Dec 2014 19:52:44 -0800 (PST) In-Reply-To: <050363D101EB63409B222217F4B02E781EC22E9F@G6W2492.americas.hpqcorp.net> Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: "Chinnathambi, Muthusamy" , "linux-perf-users@vger.kernel.org" On 12/15/14 8:18 PM, Chinnathambi, Muthusamy wrote: > Hi, > > I wanted try perf probe, but I am getting the following failure. > > [root@force perf_tests]# ./perf probe --add sys_read > Failed to find symbol sys_read in kernel > Error: Failed to add events. Works for me: $ perf probe sys_read Added new event: probe:sys_read (on sys_read) You can now use it in all perf tools, such as: perf record -e probe:sys_read -aR sleep 1 $ uname -r 3.6.11-4.fc16.x86_64 Also, sys_read already has a tracepoint: syscalls:sys_enter_read [Tracepoint event] syscalls:sys_exit_read [Tracepoint event] David