I would imagine the answer is "It depends". If the application uses the
per-CPU caches effectively, then performance may drop when HT shares the
cache between the two processes.
We are looking at reserving a couple of cores per node on Summit to run
system daemons if the use requests. If the user
Several times in the past I have jokingly asked if there shoudl eb another
lower powered CPU core ina system to run OS tasks (hello Intel - are you
listening?)
Also int he past there was advice to get best possible throughpur on AMD
Bulldozer CPUs to run only on every second core (as they share
