Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1162413AbaDCHFH (ORCPT ); Thu, 3 Apr 2014 03:05:07 -0400 Received: from mga02.intel.com ([134.134.136.20]:61185 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1162382AbaDCHFB (ORCPT ); Thu, 3 Apr 2014 03:05:01 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,784,1389772800"; d="scan'208";a="513903822" Message-ID: <533D07BE.8070202@linux.intel.com> Date: Thu, 03 Apr 2014 15:03:26 +0800 From: "Li, Aubrey" User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 MIME-Version: 1.0 To: "Du, ChangbinX" , "linux-kernel@vger.kernel.org" Subject: Re: [HELP] How to use ftrace to learn how a function is ivoked? References: <0C18FE92A7765D4EB9EE5D38D86A563A01AA980B@SHSMSX103.ccr.corp.intel.com> In-Reply-To: <0C18FE92A7765D4EB9EE5D38D86A563A01AA980B@SHSMSX103.ccr.corp.intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2014/4/3 14:36, Du, ChangbinX wrote: > Hi, All, > I have a question for ftrace usage. It is that if I have a function A, then I want to > know how function A is ivoked? > I know ftrace can show me what sub-functions that A called by below steps: > # echo function_graph > current_tracer > 　　# echo function_A > set_graph_function > # cat trace > Then a call stack will show what functions A has called. But sometimes I want to > know how A is called. Is there a method to do this? Please help me! dump_stack(), kprobe, AFAIK. Thanks, -Aubrey -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/