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Duration minimum and maximum circuit for performance counter

  • US 20050283677A1
  • Filed: 12/23/2004
  • Published: 12/22/2005
  • Est. Priority Date: 06/03/2004
  • Status: Active Grant
First Claim
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1. A circuit for tracking the minimum and maximum duration of an event of interest, the circuit connected to a counter for counting a number of clock cycles that the event of interest is active, the circuit comprising:

  • logic for detecting deactivation of the event of interest and generating a duration end signal;

    logic responsive to the duration end signal for comparing a count value with a shadow value; and

    logic for updating the shadow value based on results of the comparing.

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