The Cache Project Part 4 L1 Cache

AI悦创原创大约 2 分钟...约 664 字

The fourth and last part of the memory subsystem phase of the project is to implement a simulated controller for the memory subsystem in C. This controller manages the movement of data among the CPU, the L1 cache, the L2 cache, and main memory.

A detailed description of the memory subsystem controller is found in the memory_subsystem.c file that you already downloaded at the start of the project. I have provided extensive comments in memory_subsystem.c describing what the code should do. Your job is to fill in the missing code.

Here are the steps you should take:

Step 1

You should see what the output of testing my compiled memory subsystem controller code is by typing ./ben_test_memory_subsystem

Step 2

Open the file memory_subsystem.c in emacs and read every line closely. You'll see that I describe the interaction among the CPU, L1 cache, L2 cache, and main memory and what the controller should do when a cache miss occurs. There are five procedures that you have to implement: memory_subsystem_initialize(), memory_access(), memory_handle_l1_miss(), memory_handle_l2_miss(), and memory_handle_clock_interrupt(). You should also look closely at the related header file, memory_subsystem.h.

In memory_subsystem.c, the comments describe exactly what you have to do to implement the above five procedures to 1) initialize the memory subsystem, 2) support memory read and write requests from a CPU, 3) handle L1 cache misses by requesting cache lines from the L2 cache, 4) handle L2 cache misses by requesting cache lines from main memory, and 5) handle a clock interrupt to cause the reference bits in the L1 cache to be cleared (for NRU purposes).

You should also take a look at my code in test_memory_subsystem.c, so you can see how memory_subsystem_initialize(), memory_access(), and memory_handle_clock_interrupt() are called. The other two procedures, memory_handle_l1_miss() and memory_handle_l2_miss(), are only called internally within memory_subsystem.c.

The only file you need to modify for this part of the project is memory_subsystem.c.

Step 3

To test your code in memory_subsystem.c, you can use my test_memory_subsystem.c file. To do so, compile them together by typing make test_memory_subsystem and, if it compiles correctly, run the program by typing ./test_memory_subsystem The output when you run the program should be the same as the output when using my compiled version (./ben_test_memory_subsystem). Feel free to read and modify the code in test_memory_subsystem.c to aid in your debugging.

Step 4

Upload your memory_subsystem.c file. You’re done, congratulations!

欢迎关注我公众号：AI悦创，有更多更好玩的等你发现！

公众号：AI悦创【二维码】

AI悦创·编程一对一

AI悦创·推出辅导班啦，包括「Python 语言辅导班、C++ 辅导班、java 辅导班、算法/数据结构辅导班、少儿编程、pygame 游戏开发」，全部都是一对一教学：一对一辅导 + 一对一答疑 + 布置作业 + 项目实践等。当然，还有线下线上摄影课程、Photoshop、Premiere 一对一教学、QQ、微信在线，随时响应！微信：Jiabcdefh

C++ 信息奥赛题解，长期更新！长期招收一对一中小学信息奥赛集训，莆田、厦门地区有机会线下上门，其他地区线上。微信：Jiabcdefh

方法一：QQ

方法二：微信：Jiabcdefh