Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754652AbaFKLcz (ORCPT ); Wed, 11 Jun 2014 07:32:55 -0400 Received: from fw-tnat.cambridge.arm.com ([217.140.96.21]:51593 "EHLO cam-smtp0.cambridge.arm.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753807AbaFKLcx (ORCPT ); Wed, 11 Jun 2014 07:32:53 -0400 From: Punit Agrawal To: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: javi.merino@arm.com, Punit Agrawal , Zhang Rui , Eduardo Valentin , Steven Rostedt , Frederic Weisbecker , Ingo Molnar Subject: [RFC PATCH 1/3] thermal: trace: Trace temperature changes Date: Wed, 11 Jun 2014 12:31:42 +0100 Message-Id: <1402486305-4017-2-git-send-email-punit.agrawal@arm.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1402486305-4017-1-git-send-email-punit.agrawal@arm.com> References: <1402486305-4017-1-git-send-email-punit.agrawal@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Create a new event to trace the temperature of a thermal zone. Using this event trace the temperature changes of the thermal zone every-time it is updated. Cc: Zhang Rui Cc: Eduardo Valentin Cc: Steven Rostedt Cc: Frederic Weisbecker Cc: Ingo Molnar Signed-off-by: Punit Agrawal --- drivers/thermal/thermal_core.c | 4 ++++ include/trace/events/thermal.h | 38 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 42 insertions(+) create mode 100644 include/trace/events/thermal.h diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 71b0ec0..6b32391 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -38,6 +38,9 @@ #include #include +#define CREATE_TRACE_POINTS +#include + #include "thermal_core.h" #include "thermal_hwmon.h" @@ -463,6 +466,7 @@ static void update_temperature(struct thermal_zone_device *tz) tz->temperature = temp; mutex_unlock(&tz->lock); + trace_thermal_temperature(tz); dev_dbg(&tz->device, "last_temperature=%d, current_temperature=%d\n", tz->last_temperature, tz->temperature); } diff --git a/include/trace/events/thermal.h b/include/trace/events/thermal.h new file mode 100644 index 0000000..8c5ca96 --- /dev/null +++ b/include/trace/events/thermal.h @@ -0,0 +1,38 @@ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM thermal + +#if !defined(_TRACE_THERMAL_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_THERMAL_H + +#include +#include + +TRACE_EVENT(thermal_temperature, + + TP_PROTO(struct thermal_zone_device *tz), + + TP_ARGS(tz), + + TP_STRUCT__entry( + __string(thermal_zone, tz->type) + __field(int, id) + __field(int, temp_prev) + __field(int, temp) + ), + + TP_fast_assign( + __assign_str(thermal_zone, tz->type); + __entry->id = tz->id; + __entry->temp_prev = tz->last_temperature; + __entry->temp = tz->temperature; + ), + + TP_printk("thermal_zone=%s id=%d temp_prev=%d temp=%d", + __get_str(thermal_zone), __entry->id, __entry->temp_prev, + __entry->temp) +); + +#endif /* _TRACE_THERMAL_H */ + +/* This part must be outside protection */ +#include -- 1.7.10.4 -- 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/