KVM means that Windows petaflop “achievement” was actually done using Linux?

This seems to be one little but important detail that escaped notice by the press so far:

“Because Tsubame uses a KVM hypervisor and various cloud-like provisioning tools, it can run both Windows and Linux at the same time on different nodes, and offer users various types of processing configurations”

KVM Stands for “Kernel Virtual Machine” it is the virtualization platform embedded in the Linux Kernel, what this means is that when Tsubame was running either Windows or Linux, it was actually running them as Virtual Machines on top of Linux Physical Hosts, if I understand correctly this means that essentially, the so called Windows benchmark was actually a Linux benchmark…