Tracing thermal data via performance monitoring

• US 7,848,901 B2
• Filed: 10/02/2008
• Issued: 12/07/2010
• Est. Priority Date: 11/29/2005
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Johns, Charles Ray, Wang, Michael Fan
• Primary Examiner(s): Lau; Tung S
• Application Number:
  US12/244,596
• Publication Number:
  US 20090030644A1
• Time in Patent Office: 796 Days
• Field of Search: 702/130
• US Class Current: 702/130
• CPC Class Codes: G01K 1/022 for recording
• CPC Class Codes: G01K 3/005 Circuits arrangements for indicating a predetermined temperature fire detection G08B17/00
• CPC Class Codes: G01K 7/015 using microstructures, e.g. made of silicon
• CPC Class Codes: G06F 1/206 comprising thermal management

Abstract

A computer implemented method, data processing system, and processor are provided for tracing thermal data via performance monitoring. A performance monitor is set into a tracing mode. Temperatures are sensed by a digital thermal sensor over a time period. The sensed temperatures are stored in a data structure and a trace of the sensed temperatures is graphically displayed.

Claims

1. A computer implemented method for tracing thermal data via performance monitoring data in an integrated circuit, comprising:

setting a performance monitor within the integrated circuit into a tracing mode;

sensing, by a digital thermal sensor, a plurality of actual temperatures of the digital thermal sensor over a time period;

storing the sensed temperatures in a data structure; and

graphically displaying to a user a trace of the sensed temperatures stored in the data structure, wherein the steps of setting, sensing, storing and graphically displaying are performed by the computer implemented method, and wherein the trace of the sensed temperatures is a time-based trace that depicts the sensed temperatures with respect to time, wherein the setting, storing, and graphically displaying steps are performed by a thermal management control state machine residing within the integrated circuit.

2. The method of claim 1, wherein the setting step is performed by software.

3. The method of claim 1, wherein the sensed temperatures are for a plurality of digital thermal sensors and wherein graphically displaying the trace of the sensed temperatures is for the plurality of digital thermal sensors.

4. The method of claim 1, wherein the integrated circuit is a heterogeneous multi-core processor.

5. The method of claim 1, further comprising:

determining if the performance monitor is still running; and

responsive to the performance monitor still running, detecting the sensed temperatures by the digital thermal sensor.

6. The method of claim 1, wherein the time period is at least one of a fixed time period or a programmable time period.

7. The method of claim 1, further comprising:

compressing the sensed temperatures to increase a sampling interval.

8. The method of claim 1, wherein the sensed temperatures are stored only when a change in the sensed temperature occurs.

9. The method of claim 4, wherein the digital thermal sensor resides within one of the cores of the heterogeneous multi-core processor.

10. The method of claim 4, wherein the digital thermal sensor resides within the heterogeneous multi-core processor, but not within a core.

11. The method of claim 5, further comprising:

responsive to the performance monitor being stopped, graphically displaying the trace of the sensed temperatures for a specified duration.

12. The method of claim 5, wherein the performance monitor is stopped by at least one of a specific duration for the performance monitor to run expiring as set by a user, by user input, or based on a specific thermal condition.

13. The method of claim 11, wherein graphically displaying the trace of the sensed temperatures is performed after the performance monitor stops.