Any thought here ? Sent from my iPhone > On Feb 28, 2020, at 3:55 PM, Satish Patel <satish.txt@xxxxxxxxx> wrote: > > Folks, > > I am having major performance issue with my Erlang application running > on openstack KVM hypervisor and after so many test i found something > wrong with my KVM guest CPU Topology > > This is KVM host - http://paste.openstack.org/show/790120/ > This is KVM guest - http://paste.openstack.org/show/790121/ > > If you carefully observe output of both host and guest you can see > guest machine threads has own cache that is very strange > > L2 L#0 (4096KB) + Core L#0 > L1d L#0 (32KB) + L1i L#0 (32KB) + PU L#0 (P#0) > L1d L#1 (32KB) + L1i L#1 (32KB) + PU L#1 (P#1) > > I believe because of that my erlang doesn't understand topology and > going crazy.. > > I have Ali Cloud and AWS and when i compare with them they are showing > correct CPU Topology the way physical machine showing, something is > wrong with my KVM look like. > > I am running qemu-kvm-2.12 on centos 7.6 and i have tune my KVM at my > best level, like CPU vining, NUMA and cpu host-passthrough. > > Thanks in advance for your help.
