System and method for measuring latch contention

Details System and method for measuring latch contention System and method for measuring latch contention

2011-08-30

2011-08-30

Bullock, Jr., Lewis A (Department: 2193)

Data processing: software development, installation, and managem

Software program development tool

Testing or debugging

C717S128000, C710S200000

Reexamination Certificate

active

08010948

ABSTRACT:
A system and method is provided for measuring lock usage in a non-intrusive manner. Measurements are performed only when a lock is contended. When a lock is requested and the lock is available (i.e., is not contended), the only data gathered is a counter that is incremented to keep track of the number of times the particular lock was requested. When a lock is contended, an operating system trace hook is requested. The trace hook records data such as the timestamp that the requester requested the lock, the request count, a stack traceback to identify the function corresponding to the requester, and the address of the lock that was requested. Post-operative processing analyzes the recorded trace hook data to identify contended locks and processes that may not be efficiently using locks.

REFERENCES:
patent: 5502840 (1996-03-01), Barton
patent: 5968157 (1999-10-01), Joy et al.
patent: 6338159 (2002-01-01), Alexander et al.
patent: 6850938 (2005-02-01), Sadjadi

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