Hey all, I was wondering if anyone could recommend any resources by which to learn about memory barriers. It's a topic I've looked into several times over the past few years but have never really managed to fully crack.

For those that understand memory barriers, what helped you finally grok them? Was it obviously apparent to you or did you just hammer away at it until it became clear?

elderK: it's only needed because of out-of-order execution

and it lets you control it

your CPU manual will probably explain it

someone posted this once mirrors.edge.kernel.org/pub/linux/k…ople/paulmck/perfbook/perfbook.html a little long and some of the style is annoying IMO, but lots of good info covers other things too, but all related

Thanks :)

just search "barrier" for those portions

i wish there was one html or something, but pdf at least is searchable

just large...