On Sun, Aug 28, 2016 at 08:19:46PM +0200, Jiri Olsa wrote: > Jirka, Peter and Jean-Pierre reported performance drop on > some cpus after making cpu offline and online again. > > The reason is the kernel logic that falls back to SMT > level topology if more than one node is detected within > CPU package. During the system boot this logic cuts out > the DIE topology level and numa code adds NUMA level > on top of this.
Its not SMT topology, and back when I asked if he had CoD enabled or such he said not. See also: http://lkml.kernel.org/r/1471559812-19967-3-git-send-email-srinivas.pandruv...@linux.intel.com Arguably, that should have been split in two patches, but alas..
