Selective Victim Cache Simulator: Compares three different cache policies. Selective Victim Cache Simulator use the following simulator site.

http://www.ecs.umass.edu/ece/koren/architecture/SVCache/default.htm

Notes: 1) After setting up the mentioned specifications, INITIALIZE and then RUN.

2) After changing a certain setting, if for example, you change the cache to selective victim from normal cache; make this change, press INITIALIZE and then only RUN. Make sure that the two tables on the right are cleared before you RUN the simulation.

3) The output values are in the boxes allocated for each cache type.

1) Use the following specifications:

Specification	Value
Block size	32 bytes
L1,L2,Victim Cache type	Direct Mapped
Memory traces	T1(80K)
L1-Access time	5
L2-Access time	10
Victim cache access time	1
Memory access time	10

(a) Where does the victim lie in the memory hierarchy?

(b) Compare the memory access times for a system with and without victim cache. What do you infer?

L1 size	L2 size	Victim size	Momery Access time - w/o VC	Memory Access time - w VC
4KB	16KB	1KB
4KB	32KB	1KB
8KB	32KB	2KB
8KB	64KB	4KB

(c) How does the cache policy affect the victim cache effectiveness? On what type of cache does this victim caching technique prove most effective?

L1XL2XVC sizes	Direct Mapped - w/o VC	Direct Mapped - with VC	2-way SA - w/o VC	2-way SA with VC	4-way SA w/o VC	4-way SA with VC
4KBx16KBx1KB
4KBx32KBx2KB
8KBx64KBx4KB

2) Compare the L1 and L2 cache hits, victim cache hits between the two for different cache types and write down your inference. Use the same setup as before.

(a) What is the difference between victim and selective victim caching techniques?

(b) How better is the selective victim cache?

Direct Mapped | 2-way SA 4-way SA VC Sel-VC VC Sel-VC VCSel-VC Cache SizesComparison LI-AKB | L1 cache hit % L2-32KB | L2 cache hit % Victim-2KB | Victim cache hit % | LI-8KB | L1 cache hit % L2-64KB | L2 cache hit % | Victim-4KB | Victim cache hit % | | | Direct Mapped | 2-way SA 4-way SA VC Sel-VC VC Sel-VC VCSel-VC Cache SizesComparison LI-AKB | L1 cache hit % L2-32KB | L2 cache hit % Victim-2KB | Victim cache hit % | LI-8KB | L1 cache hit % L2-64KB | L2 cache hit % | Victim-4KB | Victim cache hit % | | |