Memory barriers for BSD hackers - Taylor R Campbell - EuroBSDcon 2022

In the good old days of sequential machines, memory loads and stores appeared to happen in the order you asked for. But today, compilers and multi-core CPUs conspire to wreak havoc on your memory operations. How do we restore order in this chaos?
This talk will present modern software abstractions for managing memory
ordering and how to think about it in real-world programs. This talk is aimed
at an audience of hackers, not academics -- there will be no overwhelmingly
detailed formal models.

[@kevinchu9601]

[8:50] I wonder why there is no problem when running it on a single core. When "L = 0;" is reordered and done earlier, there is a chance that "t = C;" will make t get the same value in two threads, regardless of on a single core or on multi cores. So what is the problem with my opinion? Anyone can help me, thanks a lot.

[@tsiiphsycoii]

The speaker is wearing a mask. Says a lot about bsd users

[@rubenerd]

I think that says more about you.