Edit: I took another look at the code changes and there should be no difference if cpu groups
is not enabled. A change in behaviour means it's running different code. But if it was running
the new code the "Binding thread" message would have included the group. I don't know what's
going on.
You can still have cpu groups with fewer than 64 cpus.
If I had groups enabled, I would have a combo box like the one in
this page. As I don't have it, I suppose I definitely don't have them enabled.
Thanks for analyzing this anyway. I'll still stick to setting affinity externally and ignore the warning.