TECHNIQUES FOR TRACING WAKELOCK USAGE

• US 20150095682A1
• Filed: 09/27/2013
• Published: 04/02/2015
• Est. Priority Date: 09/27/2013
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Gautam Upadhyaya, Min Yeol Lim, Neha Sharma, Robert P. Knight
• Inventors: Lim, Min Yeol, Knight, Robert P, Upadhyaya, Gautam, Sharma, Neha
• Granted Patent: US 9,965,014 B2
• Time in Patent Office: Days
• US Class Current: 713/323
• CPC Class Codes: G06F 1/3203 Power management, i.e. event-based initiation of a power-saving mode
• CPC Class Codes: G06F 1/3206 Monitoring of events, devices or parameters that trigger a change in power modality

Abstract

Various embodiments are generally directed to generating logs recording events related to wakelocks at application and kernel levels, and then temporally aligning graphs of those events in a visual presentation to enable debugging of wakelocks. An apparatus to debug wakelocks includes a processor component; a capture component to intercept calls associated with application level wakelocks, the intercepted calls received by an application power manager of an operating system from application routines; and a relaying component to cooperate with the application power manager to provide indications of the intercepted calls to a system log generator of the operating system coupled to the application power manager, the system log generator to generate system log data comprising indications of events associated with execution of the operating system by the processor component and the indications of the intercepted calls. Other embodiments are described and claimed.

Claims

1-25. -25. (canceled)

26. An apparatus to trace wakelock events comprising:

a processor component;

a capture component for execution by the processor component to intercept calls associated with application level wakelocks, the intercepted calls received by an application power manager of an operating system from application routines; and

a relaying component for execution by the processor component to cooperate with the application power manager to provide indications of the intercepted calls to a system log generator of the operating system coupled to the application power manager, the system log generator to generate system log data comprising indications of events associated with execution of the operating system by the processor component and the indications of the intercepted calls.

27. The apparatus of claim 26, comprising a collection component for execution by the processor component to cooperate with the application power manager to collect wakelock data that provides indications of pending application level wakelocks and correlates the pending application level wakelocks to the application routines.

28. The apparatus of claim 27, the relaying component to cooperate with the application power manager to provide indications of the pending application level wakelocks to the system log generator, the system log generator to include the indications of the pending application level wakelocks in the system log data.

29. The apparatus of claim 26, comprising the application power manager, the application power manager augmented to comprise the capture component and the relaying component.

30. The apparatus of claim 26, comprising a call component of a log device driver for execution by the processor component to signal a kernel power manager of the operating system to relay calls associated with kernel level wakelocks to the log device driver, the relayed calls received by the kernel power manager from device drivers or components of the operating system.

31. The apparatus of claim 30, comprising:

a reception component for execution by the processor component to receive the relayed calls at the log device driver; and

a logging component for execution by the processor component to generate supplemental log data comprising indications of the relayed calls.

32. The apparatus of claim 31, comprising an interface to transmit the system log data and the supplemental log data to a debugging device.

33. An apparatus to trace wakelock events comprising:

a processor component;

a correlating component to extract from system log data indications of calls associated with application level wakelocks directed to an application power manager of an operating system, to extract from supplemental log data indications of calls associated with kernel level wakelocks directed to a kernel power manager of the operating system, and to extract from the system log data indications of activity levels of components of a computing device on which the operating system is executed; and

a presentation component to generate and visually present temporally aligned timeline graphs of the calls associated with the application level wakelocks, the calls associated with the kernel level wakelocks, and changes in the activity levels of the components of the computing device on a display.

34. The apparatus of claim 33, the correlating component to extract mapping information from one of the system log data and the supplemental log data, the mapping information comprising an indication of a correlation of an application routine executed on the computing device to one of a process executed on the computing device and a thread of execution of the computing device.

35. The apparatus of claim 34, the correlating component to employ the indication of correlation to correlate at least two indications of calls associated with application level wakelocks.

36. The apparatus of claim 33, comprising controls, the presentation component to monitor the controls to receive an indication of operation of the controls conveying a command to select a period of time to which the timeline graphs are temporally aligned.

37. A computing-implemented method for tracing wakelock events comprising:

intercepting calls associated with application level wakelocks, the intercepted calls received by an application power manager of an operating system from application routines; and

cooperating with the application power manager to provide indications of the intercepted calls to a system log generator of the operating system coupled to the application power manager, the system log generator to generate system log data comprising indications of events associated with execution of the operating system and the indications of the intercepted calls.

38. The computer-implemented method of claim 37, comprising cooperating with the application power manager to collect wakelock data that provides indications of pending application level wakelocks and correlates the pending application level wakelocks to the application routines.

39. The computer-implemented method of claim 38, comprising cooperating with the application power manager to provide indications of the pending application level wakelocks to the system log generator, the system log generator to include the indications of the pending application level wakelocks in the system log data.

40. The computer-implemented method of claim 37, comprising cooperating with the application power manager to collect mapping data correlating the application routines to processes executed by the processor component or to threads on which portions of the application routines are executed.

41. The computer-implemented method of claim 37, the intercepted calls comprising a call to request a wakelock or a call to release a pending wakelock.

42. The computer-implemented method of claim 37, comprising signaling a kernel power manager of the operating system to relay calls associated with kernel level wakelocks to a log device driver, the relayed calls received by the kernel power manager from device drivers or components of the operating system.

43. The computer-implemented method of claim 42, comprising:

receiving the relayed calls at the log device driver; and

generating supplemental log data comprising indications of the relayed calls.

44. The computer-implemented method of claim 43, comprising:

extracting entries associated with the application level wakelocks from the system log data;

extracting entries associated with the kernel level wakelocks from the supplemental log data;

extracting entries indicating activity levels of components of a computing device comprising the processor component from the system log data;

temporally aligning the extracted entries; and

visually presenting on a display temporally aligned timeline graphs of events associated with the application level wakelocks and the kernel level wakelocks, and of the activity levels of the components of the computing device, the events and activity levels indicated in the extracted entries.

45. At least one machine-readable storage medium comprising instructions that when executed by a processor component, cause the processor component to:

intercept calls associated with application level wakelocks, the intercepted calls received by an application power manager of an operating system of the computing device from application routines; and

cooperate with the application power manager to provide indications of the intercepted calls to a system log generator of the operating system coupled to the application power manager, the system log generator to generate system log data comprising indications of events associated with execution of the operating system and the indications of the intercepted calls.

46. The at least one machine-readable storage medium of claim 45, the processor component caused to:

cooperate with the application power manager to collect wakelock data that provides indications of pending application level wakelocks and correlates the pending application level wakelocks to the application routines; and

cooperate with the application power manager to provide indications of the pending application level wakelocks to the system log generator, the system log generator to include the indications of the pending application level wakelocks in the system log data.

47. The at least one machine-readable storage medium of claim 45, the processor component caused to:

cooperate with the application power manager to collect mapping data correlating the application routines to processes executed by the processor component or to threads on which portions of the application routines are executed; and

cooperate with the application power manager to provide the mapping data to the system log generator, the system log generator to include the mapping data in the system log data.

48. The at least one machine-readable storage medium of claim 45, the intercepted calls comprising a call to request a wakelock or a call to release a pending wakelock.

49. The at least one machine-readable storage medium of claim 45, the processor component caused to signal a kernel power manager of the operating system to relay calls associated with kernel level wakelocks to a log device driver, the relayed calls received by the kernel power manager from device drivers or components of the operating system.

50. The at least one machine-readable storage medium of claim 49, the components of the operating system comprising the application power manager, the application power manager coupled to the kernel power manager to signal the kernel power manager with a call associated with a kernel level wakelock.