Hi On Wed, Dec 1, 2021 at 7:52 PM Miroslav Lachman <000.f...@quip.cz> wrote: >I was playing with VMs in VirtualBox and Bhyve and compared > performance with increasing vCPU count. The more cores VM get the slower
How many physical cores you have on the host? This is a characteristic behavior when overcoming. But without overcommit I observe productivity growth: 1) Single vCore benchmark via cpuminer: https://pastebin.com/mg46RvDT TOP from host: https://pastebin.com/LvbBiyFz 2) Sixteen vCore benchmark via cpuminer: https://pastebin.com/7FQjaVM8 TOP from host: https://pastebin.com/dLpreq9D I observe almost linear growth. In addition, the loss of performance can be associated with NUMA (required cpuset/cpuset_setaffinity and control of memory capacity) As far as I remember, it is not enough to simply change one parameter in .h file: https://bhyvecon.org/bhyveconOttawa2019-Rodney.pdf
