* John Ousterhout: > While doing performance analysis of a new transport protocol for > Linux, I am seeing mysterious gaps where *all* cores in an Intel CPU > (Broadwell, E52640v4) stop processing simultaneously for 200-300 > microseconds. I'm writing in the hopes that someone on this list might > know what is causing this. Here are some additional details: I think this mailing list is mostly dead. It may be the firmware that is doing something. If you can't observe it in kernel space, it's could be because the system has entered system management mode. Thanks, Florian
