Sleep wake event logging

• US 9,122,480 B2
• Filed: 01/16/2014
• Issued: 09/01/2015
• Est. Priority Date: 06/05/2009
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc.
• Inventors: Bold, Ethan, Liu, Joe, Barbero, Jonathan, Reece, Dean
• Primary Examiner(s): Huynh, Kim
• Assistant Examiner(s): Chang, Eric
• Application Number:
  US14/157,104
• Publication Number:
  US 20140201552A1
• Time in Patent Office: 593 Days
• US Class Current: 1/1
• CPC Class Codes: G06F 1/3203 Power management, i.e. event-based initiation of a power-saving mode
• CPC Class Codes: G06F 1/3275 Power saving in memory, e.g. RAM, cache
• CPC Class Codes: G06F 11/0766 Error or fault reporting or storing

Abstract

A machine implemented method includes creating a universally unique identifier, detecting a trigger of a sleep event, and associating the universally unique identifier with the sleep event. The method monitors sub-system events that occur after a sleep event has been triggered and stores data in non-volatile non-disk storage (e.g., non-boot storage) identifying an event stage corresponding to the sub-system event that is occurring. The method determines whether a wake event has completed and logs each of the sub-system events using the universally unique identifier until a wake event has completed.

Claims

1. A computer-implemented method executed in a data processing apparatus comprising:

detecting a trigger of a low power event on the data processing apparatus, wherein the data processing apparatus, responsive to the trigger of the low power event, will begin to enter a low power mode of operation;

creating an identifier specific to the occurrence of the low power event, and associating the identifier with the low power event, the identifier distinguishing the low power event from other low power events;

monitoring a plurality of system events occurring after detection of the trigger;

determining whether an exit event completed, the exit event indicating an exit from the low power mode of operation; and

logging each of the plurality of system events until a completion of the exit event is detected, wherein each system event is logged using the identifier.

2. The method of claim 1, further comprising:

creating a new identifier upon determining the exit event completed.

3. The method of claim 1, further comprising:

monitoring a plurality of system event stages occurring after trigger is detected; and

storing data in non-volatile non-disk storage identifying which of the plurality of system event stages is occurring.

4. The method of claim 1, wherein logging each of the plurality of system events comprises:

storing the identifier to non-volatile storage;

for each of the plurality of system events;

generating a message;

obtaining the identifier from the non-volatile storage;

attaching the identifier to the message; and

logging the message with the identifier.

5. The method of claim 4, wherein logging the message comprises storing the message to non-volatile storage.

6. The method of claim 1, wherein the plurality of system events comprises one or more events associated with a graphics system, a network, a display, a password, a window, device drivers, and power management.

7. A computer-implemented method comprising:

detecting a trigger of a low power event on a data processing system, the low power event causing the data processing system to attempt to enter a low power mode of operation;

monitoring a plurality of system event stages occurring after the trigger is detected;

creating an identifier specific to the occurrence of the low power event, and associating the identifier with the low power event, the identifier distinguishing the low power event from other low power events;

determining whether an exit event completed, the exit event indicating an exit from the low power mode of operation; and

writing data identifying a system event stage that is occurring to non-volatile non-disk storage until a completion of the exit event is detected.

8. The method of claim 7, wherein the non-volatile non-disk storage is a CMOS device.

9. The method of claim 7, wherein writing data identifying a system event stage that is occurring comprises:

writing a numeric code identifying a current system event stage to non-volatile non-disk storage;

determining a next system event stage is occurring; and

replacing the numeric code stored in the non-volatile non-disk storage with a numeric code identifying the next system event stage that is occurring.

10. A system comprising:

a non-volatile storage to store an identifier and a plurality of messages, wherein each message is associated with one of a plurality of system events; and

at least one processor coupled to the non-volatile storage to detect a trigger of a low power event, associate an identifier that is specific to the occurrence of the low power event with the low power event, the identifier to distinguish the occurrence of the low power event from other low power events, monitor a plurality of system events occurring after the detection of the trigger, determine whether an exit event completed, the exit event indicating an exit from a low power mode of operation, and log each of the plurality of system events occurring using the identifier associated with the low power event until a completion of the exit event is detected, wherein the system attempts to enter a low power state responsive to the trigger of the low power event, and wherein the system attempts to enter a normal operating mode upon completion of the exit event.

11. The system of claim 10, further comprising:

a non-volatile non-disk storage to store data identifying one of a plurality of system event stages; and

the at least one processor coupled to the non-volatile non-disk storage to monitor the plurality of system event stages and to identify each of the plurality of system event stages.

12. A non-transitory machine-readable storage medium storing instructions which when executed by a data processing system cause the data processing system to perform a method of processing data, the method comprising:

detecting a trigger of a low power event, the low power event to cause the data processing system to perform operations to enter a low power state;

creating an identifier specific to the occurrence of the low power event, and associating the identifier with the low power event, the identifier distinguishing the low power event from other low power events;

monitoring a plurality of system events occurring after detection of the trigger;

determining whether an exit event completed, the exit event indicating an exit from the low power state; and

logging each of the plurality of system events until a completion of the exit event is detected, wherein each system event is logged using the identifier, and wherein upon completion of the exit event the data processing system is in a normal operating mode.

13. The machine-readable storage medium of claim 12, further comprising:

creating a new identifier upon determining the exit event completed.

14. The machine-readable storage medium of claim 12, further comprising:

monitoring a plurality of system event stages occurring after the trigger is detected; and

storing data in non-volatile non-disk storage identifying which of the plurality of system event stages is occurring.

15. The machine-readable storage medium of claim 12, wherein logging each of the plurality of system events comprises:

storing the identifier to non-volatile storage;

for each of the plurality of system events;

generating a message;

obtaining the identifier from the non-volatile storage;

attaching the identifier to the message; and

logging the message with the identifier.

16. The machine-readable storage medium of claim 15, wherein logging the message comprises storing the message to non-volatile storage.

17. The machine-readable storage medium of claim 12, wherein the plurality of system one or more events comprises events associated with a graphic, a network, a display, a password, a window, device drivers, and power management.

18. A non-transitory machine-readable storage medium storing instructions which, when executed by a data processing system cause the data processing system to perform a method of processing data, the method comprising:

detecting a trigger of a low power event;

creating an identifier specific to the occurrence of the low power event, and associating the identifier with the low power event, the identifier distinguishing the low power event from other low power events;

monitoring a plurality of system event stages occurring after the trigger is detected;

determining whether an exit event completed, wherein responsive to the completion of the exit event, the data processing system is in a normal operating mode; and

writing data identifying a system event stage that is occurring to non-volatile non-disk storage until a completion of the exit event is detected.

19. The machine-readable storage medium of claim 18, wherein the non-volatile non-disk storage is a solid state memory device.

20. The machine-readable storage medium of claim 18, wherein writing data identifying a system event stage that is occurring comprises:

writing a numeric code identifying a current system event stage to non-volatile non-disk storage;

determining a next system event stage is occurring; and

replacing the numeric code stored in the non-volatile non-disk storage with a numeric code identifying the next system event stage that is occurring.