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=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED 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 F0512C4360F for ; Wed, 20 Feb 2019 18:38:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D3EEA21B24 for ; Wed, 20 Feb 2019 18:38:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727208AbfBTSiK (ORCPT ); Wed, 20 Feb 2019 13:38:10 -0500 Received: from mail.kernel.org ([198.145.29.99]:47114 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726976AbfBTSiH (ORCPT ); Wed, 20 Feb 2019 13:38:07 -0500 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E11A92190B; Wed, 20 Feb 2019 18:38:05 +0000 (UTC) Received: from rostedt by gandalf.local.home with local (Exim 4.92-RC5) (envelope-from ) id 1gwWku-0006ei-TY; Wed, 20 Feb 2019 13:38:04 -0500 Message-Id: <20190220183804.803102229@goodmis.org> User-Agent: quilt/0.65 Date: Wed, 20 Feb 2019 13:37:47 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Andrew Morton , Changbin Du Subject: [for-next][PATCH 10/29] tracing: Change the function format to display function names by perf References: <20190220183737.034634614@goodmis.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Changbin Du Here is an example for this change. $ sudo perf record -e 'ftrace:function' --filter='ip==schedule' $ sudo perf report The output of perf before this patch: \# Samples: 100 of event 'ftrace:function' \# Event count (approx.): 100 \# \# Overhead Trace output \# ........ ...................................... \# 51.00% ffffffff81f6aaa0 <-- ffffffff81158e8d 29.00% ffffffff81f6aaa0 <-- ffffffff8116ccb2 8.00% ffffffff81f6aaa0 <-- ffffffff81f6f2ed 4.00% ffffffff81f6aaa0 <-- ffffffff811628db 4.00% ffffffff81f6aaa0 <-- ffffffff81f6ec5b 2.00% ffffffff81f6aaa0 <-- ffffffff81f6f21a 1.00% ffffffff81f6aaa0 <-- ffffffff811b04af 1.00% ffffffff81f6aaa0 <-- ffffffff8143ce17 After this patch: \# Samples: 36 of event 'ftrace:function' \# Event count (approx.): 36 \# \# Overhead Trace output \# ........ ............................................ \# 38.89% schedule <-- schedule_hrtimeout_range_clock 27.78% schedule <-- worker_thread 13.89% schedule <-- schedule_timeout 11.11% schedule <-- smpboot_thread_fn 5.56% schedule <-- rcu_gp_kthread 2.78% schedule <-- exit_to_usermode_loop Link: http://lkml.kernel.org/r/20190209161919.32350-1-changbin.du@gmail.com Signed-off-by: Changbin Du Signed-off-by: Steven Rostedt (VMware) --- kernel/trace/trace_entries.h | 41 +++++++++++++++++------------------- 1 file changed, 19 insertions(+), 22 deletions(-) diff --git a/kernel/trace/trace_entries.h b/kernel/trace/trace_entries.h index 06bb2fd9a56c..fc8e97328e54 100644 --- a/kernel/trace/trace_entries.h +++ b/kernel/trace/trace_entries.h @@ -65,7 +65,8 @@ FTRACE_ENTRY_REG(function, ftrace_entry, __field( unsigned long, parent_ip ) ), - F_printk(" %lx <-- %lx", __entry->ip, __entry->parent_ip), + F_printk(" %ps <-- %ps", + (void *)__entry->ip, (void *)__entry->parent_ip), FILTER_TRACE_FN, @@ -83,7 +84,7 @@ FTRACE_ENTRY_PACKED(funcgraph_entry, ftrace_graph_ent_entry, __field_desc( int, graph_ent, depth ) ), - F_printk("--> %lx (%d)", __entry->func, __entry->depth), + F_printk("--> %ps (%d)", (void *)__entry->func, __entry->depth), FILTER_OTHER ); @@ -102,8 +103,8 @@ FTRACE_ENTRY_PACKED(funcgraph_exit, ftrace_graph_ret_entry, __field_desc( int, ret, depth ) ), - F_printk("<-- %lx (%d) (start: %llx end: %llx) over: %d", - __entry->func, __entry->depth, + F_printk("<-- %ps (%d) (start: %llx end: %llx) over: %d", + (void *)__entry->func, __entry->depth, __entry->calltime, __entry->rettime, __entry->depth), @@ -167,12 +168,6 @@ FTRACE_ENTRY_DUP(wakeup, ctx_switch_entry, #define FTRACE_STACK_ENTRIES 8 -#ifndef CONFIG_64BIT -# define IP_FMT "%08lx" -#else -# define IP_FMT "%016lx" -#endif - FTRACE_ENTRY(kernel_stack, stack_entry, TRACE_STACK, @@ -182,12 +177,13 @@ FTRACE_ENTRY(kernel_stack, stack_entry, __dynamic_array(unsigned long, caller ) ), - F_printk("\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n" - "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n" - "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n", - __entry->caller[0], __entry->caller[1], __entry->caller[2], - __entry->caller[3], __entry->caller[4], __entry->caller[5], - __entry->caller[6], __entry->caller[7]), + F_printk("\t=> %ps\n\t=> %ps\n\t=> %ps\n" + "\t=> %ps\n\t=> %ps\n\t=> %ps\n" + "\t=> %ps\n\t=> %ps\n", + (void *)__entry->caller[0], (void *)__entry->caller[1], + (void *)__entry->caller[2], (void *)__entry->caller[3], + (void *)__entry->caller[4], (void *)__entry->caller[5], + (void *)__entry->caller[6], (void *)__entry->caller[7]), FILTER_OTHER ); @@ -201,12 +197,13 @@ FTRACE_ENTRY(user_stack, userstack_entry, __array( unsigned long, caller, FTRACE_STACK_ENTRIES ) ), - F_printk("\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n" - "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n" - "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n", - __entry->caller[0], __entry->caller[1], __entry->caller[2], - __entry->caller[3], __entry->caller[4], __entry->caller[5], - __entry->caller[6], __entry->caller[7]), + F_printk("\t=> %ps\n\t=> %ps\n\t=> %ps\n" + "\t=> %ps\n\t=> %ps\n\t=> %ps\n" + "\t=> %ps\n\t=> %ps\n", + (void *)__entry->caller[0], (void *)__entry->caller[1], + (void *)__entry->caller[2], (void *)__entry->caller[3], + (void *)__entry->caller[4], (void *)__entry->caller[5], + (void *)__entry->caller[6], (void *)__entry->caller[7]), FILTER_OTHER ); -- 2.20.1