kernel/include/trace/events/power.h, branch linux-3.17.y

PM / sleep: trace events for device PM callbacks

2014-06-11T00:16:48Z

Adds two trace events which supply the same info that initcall_debug provides, but via ftrace instead of dmesg. The existing initcall_debug calls require the pm_print_times_enabled var to be set (either via sysfs or via the kernel cmd line). The new trace events provide all the same info as the initcall_debug prints but with less overhead, and also with coverage of device prepare and complete device callbacks. These events replace the device_pm_report_time event (which has been removed). device_pm_callback_start is called first and provides the device and callback info. device_pm_callback_end is called after with the device name and error info. The time and pid are gathered from the trace data headers. Signed-off-by: Todd Brandt Signed-off-by: Rafael J. Wysocki

PM / sleep: trace events for suspend/resume

2014-06-06T22:18:07Z

Adds trace events that give finer resolution into suspend/resume. These events are graphed in the timelines generated by the analyze_suspend.py script. They represent large areas of time consumed that are typical to suspend and resume. The event is triggered by calling the function "trace_suspend_resume" with three arguments: a string (the name of the event to be displayed in the timeline), an integer (case specific number, such as the power state or cpu number), and a boolean (where true is used to denote the start of the timeline event, and false to denote the end). The suspend_resume trace event reproduces the data that the machine_suspend trace event did, so the latter has been removed. Signed-off-by: Todd Brandt Acked-by: Steven Rostedt Signed-off-by: Rafael J. Wysocki

Merge branches 'pm-qos', 'pm-domains' and 'pm-drivers'

2014-03-20T12:25:36Z

* pm-qos: PM / QoS: Add type to dev_pm_qos_add_ancestor_request() arguments ACPI / LPSS: Support for device latency tolerance PM QoS ACPI / scan: Add bind/unbind callbacks to struct acpi_scan_handler PM / QoS: Introcuce latency tolerance device PM QoS type PM / QoS: Add no_constraints_value field to struct pm_qos_constraints PM / QoS: Rename device resume latency QoS items * pm-domains: PM / domains: Turn latency warning into debug message * pm-drivers: PM: Add pm_runtime_suspend|resume_force functions PM / runtime: Fetch runtime PM callbacks using a macro

intel_pstate: Remove energy reporting from pstate_sample tracepoint

2014-02-13T01:11:18Z

Remove the reporting of energy since it does not provide any useful information about the state of the driver and will be a maintainance headache going forward since the RAPL energy units register is not architectural and subject to change between micro-architectures References: https://bugzilla.kernel.org/show_bug.cgi?id=69831 Fixes: b69880f9ccf7 (intel_pstate: Add trace point to report internal state.) Signed-off-by: Dirk Brandewie Signed-off-by: Rafael J. Wysocki

PM / QoS: Rename device resume latency QoS items

2014-02-10T23:35:23Z

Rename symbols, variables, functions and structure fields related do the resume latency device PM QoS type so that it is clear where they belong (in particular, to avoid confusion with the latency tolerance device PM QoS type introduced by a subsequent changeset). Update the PM QoS documentation to better reflect its current state. Signed-off-by: Rafael J. Wysocki

intel_pstate: Add trace point to report internal state.

2014-01-17T01:00:44Z

Add perf trace event "power:pstate_sample" to report driver state to aid in diagnosing issues reported against intel_pstate. Signed-off-by: Dirk Brandewie Signed-off-by: Rafael J. Wysocki

PM / Sleep: new trace event to print device suspend and resume times

2013-07-27T01:18:35Z

A new trace event is added to PM events to print the time it takes to suspend and resume a device. It generates trace messages that include device, driver, parent information in addition to the type of PM ops invoked as well as the PM event and error status from the PM ops. Example trace below: bash-2239 [000] .... 290.883035: device_pm_report_time: backlight acpi_video0 parent=0000:00:02.0 state=freeze ops=class nsecs=332 err=0 bash-2239 [000] .... 290.883041: device_pm_report_time: rfkill rf kill3 parent=phy0 state=freeze ops=legacy class nsecs=216 err=0 bash-2239 [001] .... 290.973892: device_pm_report_time: ieee80211 phy0 parent=0000:01:00.0 state=freeze ops=legacy class nsecs=90846477 err=0 bash-2239 [001] .... 293.660129: device_pm_report_time: ieee80211 phy0 parent=0000:01:00.0 state=restore ops=legacy class nsecs=101295162 err=0 bash-2239 [001] .... 293.660147: device_pm_report_time: rfkill rfkill3 parent=phy0 state=restore ops=legacy class nsecs=1804 err=0 bash-2239 [001] .... 293.660157: device_pm_report_time: backlight acpi_video0 parent=0000:00:02.0 state=restore ops=class nsecs=757 err=0 Signed-off-by: Shuah Khan Signed-off-by: Rafael J. Wysocki

PM / QoS: Add dev_pm_qos_request tracepoints

2013-06-24T11:09:03Z

Adds tracepoints to dev_pm_qos_add_request, dev_pm_qos_update_request, and dev_pm_qos_remove_request. It's useful for checking device name, dev_pm_qos_request_type, and value. Signed-off-by: Sahara Signed-off-by: Rafael J. Wysocki

PM / QoS: Add pm_qos_request tracepoints

2013-06-24T11:09:03Z

Adds tracepoints to pm_qos_add_request, pm_qos_update_request, pm_qos_remove_request, and pm_qos_update_request_timeout. It's useful for checking pm_qos_class, value, and timeout_us. Signed-off-by: Sahara Signed-off-by: Rafael J. Wysocki

PM / QoS: Add pm_qos_update_target/flags tracepoints

2013-06-24T11:09:03Z

This patch adds tracepoints to pm_qos_update_target and pm_qos_update_flags. It's useful for checking pm qos action, previous value and current value. Signed-off-by: Sahara Signed-off-by: Rafael J. Wysocki