Consider a 2 level memory hierarchy. L1 (cache) has an accessing time of 15 ns and main memory has an accessing time of 20 ns. Writing or updating contents into their memory takes 30 ns for L1 and 25ns for main memory respectively. Assume L1 gives misses 75% of the time.
The average WRITING time for system (in ns) if it uses WRITE-THROUGH technique for hierarchical access is ______.
The average READING time for system (in ns) if it uses WRITE-THROUGH technique for hierarchical access is ______.
The average WRITING time for system (in ns) if it uses WRITE-THROUGH technique for simultaneous access is ______.
The average READING time for system (in ns) if it uses WRITE-THROUGH technique for simultaneous access is ______.
