Hi all,
I found page table switch is more expensive in kvm/qemu than on bare-metal.
Does anyone have idea how to improve the page table switch performance?
Or do I need some special set up for qemu/kvm?
Thanks
Yuxinq
On 05/10/2016 21:24, Yuxin Ren wrote:
I found page table switch is more expensive in kvm/qemu than on bare-metal.
Does anyone have idea how to improve the page table switch performance?
Or do I need some special set up for qemu/kvm?
When the page tables are switched on bare metal, the CPU
simply
Thank you for your reply.
My cpu supports hardware virtualization, such as intel extended page table.
And I am using qemu 2.0 under Ubuntu 14.04.
I measured the page table switch cost.
On bare metal, it's 140 cycles, but in qemu/kvm, it is 450 cycles.
Do you have some idea where the extra 300 cycle
