Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753660Ab0LHQkX (ORCPT ); Wed, 8 Dec 2010 11:40:23 -0500 Received: from ipmail07.adl2.internode.on.net ([150.101.137.131]:40404 "EHLO ipmail07.adl2.internode.on.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752607Ab0LHQkW (ORCPT ); Wed, 8 Dec 2010 11:40:22 -0500 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AvsEAOtD/0x5LdBk/2dsb2JhbACjXHnAUIVJBA Date: Thu, 9 Dec 2010 03:40:15 +1100 From: Nick Piggin To: Arnaldo Carvalho de Melo Cc: linux-kernel@vger.kernel.org Subject: buggy perf callgraph output Message-ID: <20101208164015.GA5444@amd> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4167 Lines: 115 Hi, I get strange looking perf output with the callchain hits not sorted properly for graph and fractal: 7.34% open [kernel.kallsyms] [k] kmem_cache_alloc | --- kmem_cache_alloc | |---0.05%-- get_empty_filp | do_filp_open | do_sys_open | sys_open | system_call | __open_nocancel | ---0.16%-- getname do_sys_open sys_open system_call __open_nocancel 6.17% open [kernel.kallsyms] [k] _raw_spin_lock | --- _raw_spin_lock | |---0.01%-- add_partial | __slab_free | kmem_cache_free | file_free_rcu | __rcu_process_callbacks | rcu_process_callbacks | __do_softirq | call_softirq | do_softirq | irq_exit | smp_apic_timer_interrupt | apic_timer_interrupt | |---0.16%-- dput | | | --0.57%-- fput | filp_close | sys_close | system_call | __libc_close | |--0.60%-- link_path_walk | do_path_lookup | do_filp_open | do_sys_open | sys_open | system_call | __open_nocancel | |--0.57%-- __slab_free | kmem_cache_free | file_free_rcu | __rcu_process_callbacks | rcu_process_callbacks | __do_softirq With flat it looks a bit better: 7.34% open [kernel.kallsyms] [k] kmem_cache_alloc 6.09% kmem_cache_alloc get_empty_filp do_filp_open do_sys_open sys_open system_call __open_nocancel 1.07% kmem_cache_alloc getname do_sys_open sys_open system_call __open_nocancel 6.17% open [kernel.kallsyms] [k] _raw_spin_lock 0.60% _raw_spin_lock link_path_walk do_path_lookup do_filp_open do_sys_open sys_open system_call __open_nocancel 0.57% _raw_spin_lock fd_install do_sys_open sys_open system_call __open_nocancel 0.57% _raw_spin_lock dput fput filp_close sys_close system_call __libc_close -- 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/