Would KVM have any scalability issues in comparison to a real system,
e.g. if a KVM emulated 16 cores all of which get assign tasks 100% of
the time. Would KVM scale just as well as a real system ?
Trent
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On Mon, Feb 3, 2014 at 9:31 PM, Paolo Bonzini pbonz...@redhat.com wrote:
Il 03/02/2014 18:06, Xin Tong ha scritto:
/.../qemu-system-x86_64 TID 2537 [TID 2537] (877 ticks/71.24%)
This is the CPU thread (calls into the KVM modules).
This is the thread that calls the int kvm_cpu_exec
1.31 skip_emulated_instruction
1 0.65 vmx_set_rflags
1 0.65 vmx_vcpu_load
Thank you,
Xin
On Mon, Feb 3, 2014 at 2:11 AM, Paolo Bonzini pbonz...@redhat.com wrote:
Il 02/02/2014 16:47, Xin Tong ha scritto:
On Sun, Feb 2, 2014 at 5:37 AM, Paolo Bonzini pbonz
/lib/debug/boot/vmlinux-3.11.0-13-generic
guest_exit
21 0.63 /usr/lib/debug/boot/vmlinux-3.11.0-13-generic
native_load_gdt
...
Thank you.
On Wed, Jan 29, 2014 at 11:06 PM, Xin Tong xerox.time.t...@gmail.com wrote:
Hi
I would like to measure the performance of KVM
Hi
I would like to measure the performance of KVM by using hardware
performance counters and I have some questions
1. if i want to get the amount of time spent in instruction and device
emulation, should i use oprofile on the kvm process on the host
machine ?
2. what about amount of time spent
, 2011 at 8:50 PM, 王永博 wangyongb...@gmail.com wrote:
2011/11/14 Xin Tong xerox.time.t...@gmail.com
I would like to know how I can make a UD2 (Undefined Instruction)
cause a vmexit in KVM ?
Thanks
Xin
what is UD2 ?
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I am investigating how PIO is emulated in KVM and QEMU. when a PIO is
encountered, it seems to me that its pio data is copied to
vcpu-arch.pio_data and a fixed offset is assigned to
vcpu-run-io.data_offset.
static int emulator_pio_out_emulated(int size, unsigned short port,
{...
I have 2 questions regard TLB and PageTable in KVM.
1. I do not really get how the TLB gets saved and restored on when the
guest os vmexits and vmresumes. Or maybe the TLB is not saved at all (
TLB flushes when vmexit and vmenter happen).
2. Say i have multiple vCPUs and each of them running
I would like to know how I can make a UD2 (Undefined Instruction)
cause a vmexit in KVM ?
Thanks
Xin
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