> https://csapp.cs.cmu.edu/3e/labs.html

Accessing cachelab.tar there regrettably requires login. Also on https://csapp.cs.cmu.edu/public/labs.html . Though the other Cache Lab links work. But googling "cachelab" currently turns up similar elsewhere. And a few students' solutions. Tnx!

You're welcome, the self-study handout [1] doesn't require login.

[1] http://csapp.cs.cmu.edu/3e/cachelab-handout.tar