Finish the implementation of a program that builds on the dependent-load measurement technique we used in p7 in order to estimate the cache sizes and latencies of a processor
You need to implement two functions:
- void prep(int ws)
Allocate a data structure of the given size in bytes and prepare it for use the "doit" function
- int doit()
Start a chain of dependent loads in the style of p7 drawn from random addresses in the data structure created by "prep" and return the number of loads performed.
The main program will iterate over different working set sizes and in each iteration will:
- call prep with the working set size - call doit multiple times - prints the working set and an estimate of the load latency in cycles
Deliverables:
- finish the implementation of prep and doit
- edit ANSWERS and provide estimates and reasoning for:
* Number of cache levels * An estimate for the latency of each level as well main memory
To compile:
- make
To run:
- make run
Files:
- Makefile - the make file (leave it alone) - main.c - the main program (leave it alone) - common.h - shared headers (leave it alone) - cstuff.c - put any C code you need here - sstuff.c - put any assemble code you need here - ANSWERS - your answers
