From mboxrd@z Thu Jan 1 00:00:00 1970 From: Srinath Subject: How to interpret perf reporting tool Date: Wed, 2 Sep 2015 00:48:35 +0000 (UTC) Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: Received: from plane.gmane.org ([80.91.229.3]:44354 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751259AbbIBAuI (ORCPT ); Tue, 1 Sep 2015 20:50:08 -0400 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1ZWwFX-0000Je-QK for linux-perf-users@vger.kernel.org; Wed, 02 Sep 2015 02:50:04 +0200 Received: from sjc12-dmz-wsa-3.cisco.com ([173.36.240.168]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 02 Sep 2015 02:50:03 +0200 Received: from srsuryan by sjc12-dmz-wsa-3.cisco.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 02 Sep 2015 02:50:03 +0200 Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: linux-perf-users@vger.kernel.org Hi, I would like to understand how to interpret perf tool output such as reporting output etc. Specifically, I would like to understand how to understand the following output I got from running my program M sched:sched_switch ? 633K sched:sched_stat_wait ? 620K sched:sched_stat_sleep ? 2K sched:sched_stat_iowait ? 648K sched:sched_stat_runtime ? 72 sched:sched_process_fork ? 623K sched:sched_wakeup ? 4K sched:sched_migrate_task ? ? My problem is, I see the ipc I am using takes long time but during this capture the cpu idle time has been 98%. So I am wondering where have I gone wrong? Thank you, Srinath