Demos

One directory per demo: the sources, a Makefile, the commands to run and the question to ask about the result. Build a demo with make inside its directory.

Demo	Shows	Run it live?
00-pitch/page-faults	Ten billion page faults since boot.	Yes --- the opener
00-pitch/total-rss	The RSS sum is larger than the memory in use.	Yes
01-two-views/zones-and-pages	33 zones, 2,600 pages, 1,100 present.	Yes
01-two-views/reserve-allocate	mmap() edits the list, the first touch edits the table.	Yes --- two terminals
02-page-fault/segfault	SEGV_ACCERR and SEGV_MAPERR, by the program itself.	Yes
02-page-fault/major-fault	16,384 major faults, then 1,024 minor ones.	Yes
03-frames/page-cache	Every running program's code is in the page cache.	If time
03-frames/swap	256 MB in a 64 MB box: 190 MB to swap, 8,400 major faults back.	Yes
04-memory-sharing/uss-pss-rss	Rss and Pss per zone of the shell.	Yes
04-memory-sharing/uss-pss-rss-multiple	Ten processes, four ways.	Two of the four
04-memory-sharing/fork-cow	0 faults to read 64 MB after fork(), 16,384 to write it.	Yes
05-page-table/table-size	60 KB of page tables, against 256 GB flat.	Yes
05-page-table/tlb	92% TLB misses, then almost none on 2 MB pages.	Yes --- sudo

Before the lecture

for d in 01-two-views/reserve-allocate 02-page-fault/segfault 02-page-fault/major-fault 03-frames/swap \
         04-memory-sharing/fork-cow 05-page-table/tlb; do ( cd $d && make ); done
( cd 04-memory-sharing/uss-pss-rss-multiple && ./generate.sh && ./build.sh )
systemd-run --user --scope -p MemoryMax=64M true && echo "cgroup ok"
swapon --show

Needs gcc, make, ps, pmap, smem, fincore, strace, systemd-run, swap enabled, and sudo with perf for the TLB counters. major_fault needs a directory on a real disk, not /tmp.