The best introduction is probably the original presentation paper from 2002. Fuss, Futexes, and Furwoks: Fast Userlevel Locking in Linux https://www.kernel.or

The best introduction is probably the original presentation paper from 2002. Fuss, Futexes, and Furwoks: Fast Userlevel Locking in Linux https://www.kernel.org/doc/ols/2002/ols2002-pages-479-495.pdf https://www.kernel.org/doc/ols/2002/ols2002-pages-479-495.pd... Another great paper that came after some additional experience by glibc developers: Futexes are Tricky, by Ulrich Drepper https://www.akkadia.org/drepper/futex.pdf https://www.akkadia.org/drepper/futex.pdf