CIS332 (Spring 1998) Principles of Operating Systems;
Professor Franz J. Kurfess

Homework Task Deadline Points Student Name:
6 Memory Management March 16 10
Effective Memory Access Time In the paging memory management scheme, the system performance greatly depends on the use of associative registers or translation-look-aside buffers (TLBs) and their hit ratios. Compute the effective access times for the situations given below, based on 70 ns memory access time and 5 ns TLB access time.
single-level paging, 80 % hit ratio
single-level paging, 95 % hit ratio
four-level paging, 80 % hit ratio
four-level paging, 99 % hit ratio
In order to have a performance loss of less than 15 %, what hit ratio do we have to achieve with
one-level paging
four-level paging

CIS 332 Principles of Operating Systems Spring 1998 Franz Kurfess.