U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Periodic process timer

Patent 6385637 Issued on May 7, 2002. Estimated Expiration Date: Icon_subject August 21, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

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Inventors

Assignee

Application

No. 915707 filed on 08/21/1997

US Classes:

718/107, Multitasking, time sharing379/265.03, Reporting status (e.g., supervisory reporting)702/182, Performance or efficiency evaluation713/502, Counting, scheduling, or event timing718/108Context switching

Examiners

Primary: Courtenay, III, St. John
Assistant: Bullock, Lewis A. Jr.

Attorney, Agent or Firm

International Classes

G06F 009/00
G06F 011/30
H04M 003/22

Abstract

A periodic process timer is incorporated into a multi-tasking operating system of an automatic call distributor system. The process timing method includes the steps of: a) initializing a plurality of accumulator values corresponding to a single process of a plurality of processes, each accumulator value defined to represent a total processing time for each process; b) recording a starting value of a counter device; c) activating the counter device prior to execution of a selected process; d) permitting the selected process to execute; e) stopping the counter device after execution of the selected process; f) reading and ending value of the counter device; g) determining a difference value between the starting value and the ending value in the counter device; h) adding the difference value of the counter device to the accumulator value corresponding to the selected process; i) continuously repeating steps (b) through (h) until a predetermined amount of time has elapsed, to obtain a total accumulator value representing the total processing time for each selected process; and j) saving the accumulator values for each selected process.

Other References

  • Stewart David B. "Measuring Execution Time and Real-time Performance", Embedded Systems Conference, Apr. 2001, pp. 1-15.
  • Corti, Matteo et al. "Approximation of Worst-Case Execution Time for Preemptive Multitasking Systems" ACM 2000.
  • Williams, Robin et al. "Jargon, An Informal Dictionary of Computer Terms", Jun. 1993.
  • American Heritage Dictionaries. "Dictionary of Computer Words", 1995.
  • (Microsoft) Microsoft. "MS Windows NT Workstation 4.0 Resource Guide" Chapter 9-11, Performance Monitoring, 199
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