From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761334Ab2EIX4D (ORCPT ); Wed, 9 May 2012 19:56:03 -0400 Received: from mail-ey0-f202.google.com ([209.85.215.202]:52411 "EHLO mail-ey0-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760680Ab2EIX4A (ORCPT ); Wed, 9 May 2012 19:56:00 -0400 From: Colin Cross To: linux-kernel@vger.kernel.org Cc: Colin Cross , Steven Rostedt , Frederic Weisbecker , Ingo Molnar , Jesper Juhl , Jiri Kosina , "Paul E. McKenney" , Josh Triplett Subject: [PATCH v2] trace: power: add trace_clock_set_parent Date: Wed, 9 May 2012 16:55:53 -0700 Message-Id: <1336607756-7947-1-git-send-email-ccross@android.com> X-Mailer: git-send-email 1.7.7.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Adds a new trace event to be called from clk_set_parent. Some cpufreq drivers, including Tegra, reparent the cpu clock to a slower clock while the main pll is relocking, tracing clk_set_parent allows traces to show how for long the cpu is running slower. Uses a separate TRACE_EVENT instead of the clock event class to allow the event to contain string names for the child and the parent. Signed-off-by: Colin Cross --- include/trace/events/power.h | 19 +++++++++++++++++++ 1 files changed, 19 insertions(+), 0 deletions(-) diff --git a/include/trace/events/power.h b/include/trace/events/power.h index cae9a94..9271f5d 100644 --- a/include/trace/events/power.h +++ b/include/trace/events/power.h @@ -204,6 +204,25 @@ enum { TP_ARGS(name, state, cpu_id) ); +TRACE_EVENT(clock_set_parent, + + TP_PROTO(const char *name, const char *parent_name), + + TP_ARGS(name, parent_name), + + TP_STRUCT__entry( + __string( name, name ) + __string( parent_name, parent_name ) + ), + + TP_fast_assign( + __assign_str(name, name); + __assign_str(parent_name, parent_name); + ), + + TP_printk("%s parent=%s", __get_str(name), __get_str(parent_name)) +); + /* * The power domain events are used for power domains transitions */ -- 1.7.7.3