From b354d8ad262dbf8ec385dfe35dae53ebd7282d07 Mon Sep 17 00:00:00 2001 From: Colin Cross Date: Wed, 9 May 2012 16:09:50 -0700 Subject: [PATCH] ANDROID: trace: power: add trace_clock_set_parent 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 file changed, 19 insertions(+) diff --git a/include/trace/events/power.h b/include/trace/events/power.h index 3d545204897b..ed0919edd1b6 100644 --- a/include/trace/events/power.h +++ b/include/trace/events/power.h @@ -325,6 +325,25 @@ DEFINE_EVENT(clock, clock_set_rate, 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 */