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General: Understanding Memory - Page Fault Resolution (Illustration)

Illustration of Page Fault Resolution. To better understand how Page Fault occurs with respect to the illustration, refer to article, "General: Understanding Memory - Page Fault Resolution".


Fig 1: Page Fault Resolution

Page Fault Resolution, page fault, memoryThe sequence of Page Fault resolution as follows.

  1. Thread attempts to reference page in memory.
  2. Page not resident in real memory thus not found.
  3. Hardware interrupt occur to resolve page fault.
  4. ISR gains control to validate the referenced address.
  5. Locate page on secondary storage.
  6. Copy page into available free page in real memory.
  7. Resume thread execution cycle.

The time taken for Page Fault Resolution thus equivalent from Step [3] to [6]. Having mentioned that, if memory is the performance bottleneck with the number of Page Faults increases over time, the application/system may experience delay due to the time needed to perform Page Fault Resolution pointed in Step [3] to [6].


Related Topics

Page Fault Resolution
Performance Concerns
Virtual Memory Shortage Alerts
Available Bytes

LRU
System Working Set
Detecting Memory Leaks
Measuring Memory Utilization

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