Once the VM resumes at the target, its memory accesses result in
page faults that can be serviced by requesting the referenced page over the network from the source node.
For pages in the single-writer mode, the home SMP defers service of the
page fault and instead initiates invalidation.
The simulation output is composed by total simulation time, number of memory accesses, number of
page faults, and execution space time product.
CVM first vectors
page fault requests to the tape protocol, providing an opportunity to search the queue for a tape that contains the requested page.
For example, in addition to stating that the optimized
Page Fault path must not exceed 8,000 instructions, it might have been beneficial to break this number down into the maximum allowed contribution from the various subsystems used along the
Page Fault path.
Short-running services such as the quick
page fault handler (QUICK-FAULT), where the trap overhead itself is a significant portion of the service, show slowdowns over a factor of 3.
trace trap, illegal operation), and four more to record system trap types (memory error,
page fault, etc.
Weighing in at a mere 400Kb, this version also incorporates a full memory-monitoring tool covering everything from virtual memory usage of individual programs to system
page faults.
These enhancements range in scope from data reuse hints, atomic operations, dynamic power adjustment mechanisms, latency tolerance reporting, loose transaction ordering, I/O
page faults, BAR resizing and many more extensions in support of platform energy efficiency, software model flexibility and architectural scalability.
Enhanced error recovery - provides information for efficient detection and recovery from
page faults and errors.
With the Least Recently Used (LRU) page-replacement policy, when the page size is halved, the number of
page faults can be more than double the original number of
page faults.
