The 2002 ISMM paper on MPS says that there is a global pause. As usual, it may be fine for small heaps and allocation rates, but eventually it will become a problem.
There is currently a "global pause" to scan thread registers and stacks at "flip", but that's all. Is that what you meant?
Since we're just moving our commercial clients onto 64-bit, we don't have experience except up to the 4GB limit (or 3GB in old Windows) which they approach regularly. We're still waiting for it to become a problem. I may have a different opinion in a year.
One of my short term goals is just to get some measurements together to publish. Watch this space, and sorry that they aren't here yet.
Since we're just moving our commercial clients onto 64-bit, we don't have experience except up to the 4GB limit (or 3GB in old Windows) which they approach regularly. We're still waiting for it to become a problem. I may have a different opinion in a year.
One of my short term goals is just to get some measurements together to publish. Watch this space, and sorry that they aren't here yet.