hw4-Memory-Manager

• Hw4 requirements

Objective

• Understand how to implement the progress of memory allocating using different policies

Compile

make

Execute

./MemManager

The simulator supports：

  TLB replacement policy：LRU, RANDOM
  Page replacement policy：FIFO, CLOCK
  Frame alloction policy：GLOBAL, LOCAL

-->can be modified in sys_config.txt(in UPPER case)

Input file format

Initailize configuration

Users can configure hardware and policies in sys_config Notice that this simulator does not support more than 26 processes

Simulate

To make a memory allocation (modified in trace.txt), you must assign reference in following format

• Reference(A,B) , where A is the name of the process(up to Z) and B is the number of virtual frame number

Ouput files

The program gernerate two text files, trace_output.txt and analysis.txt

trace_output.txt

PFN: frame index that is about to be replaced
Source: the block number of the page which is page-in from disk
Destination: the block number where the evicted page page-out

Format for a TLB hit:

Process [X], TLB Hit, [VPN]=>[PFN]

Format for a TLB miss:

Page hit： Process [X], TLB Miss, Page Hit, [VPN]=>[PFN]
Page fault： Process [X], TLB Miss, Page Fault, [PFN], Evict [VPN] of Process [X] to [Destination], [VPN]<<[Source]

analysis.txt

In this file, you get to see the TLB hit ratio and page fault ratio of each process