PPT Slide
- Process exit
- Free memory used by page table.
- Free disk space on swap partition used by process.
- Free the page frames the process was using.
Cost Evaluation of VM
- Just as the TLB acted like a cache, where high cache hit rates are required for reasonable operation, the page fault rate (# of page faults/unit of time) needs to be low. If not, the program starts to run at disk speed!
- Page faults are dramatically more expensive than a TLB miss -- look at all the software operations involved in a page fault.