Re: Performance counters in kvm?

["Binh Q. Pham" <binhpham@cs.rutgers.edu>]

[-- Attachment #1: Type: text/plain, Size: 836 bytes --]

cpuid output is attached.
I didn't know that the kernel was not compiled with virtualization 
support as I was using a ready image from ubuntu website to install the 
VM. In the long run, are you suggesting me to recompile the kernel for 
the guest to make sure that it has virtualization support?

Thanks,
-Binh
On 11/14/2013 11:46 AM, Gleb Natapov wrote:
> On Thu, Nov 14, 2013 at 11:17:36AM -0500, Binh Q. Pham wrote:
>> I am using: QEMU emulator version 1.5.0 (Debian
>> 1.5.0+dfsg-3ubuntu5), Copyright (c) 2003-2008 Fabrice Bellard
>> Attached files are output from cpuinfo and dmesg that you asked for.
>>
> What is the output of "cpuid" in the guest? BTW your guest kernel is not
> compiled with virtualization support. Shouldn't matter for perf
> counters, but other things may be slow or not work correctly.
>
> --
> 			Gleb.


[-- Attachment #2: cpuid.out --]
[-- Type: text/plain, Size: 2321 bytes --]

 eax in    eax      ebx      ecx      edx
00000000 0000000d 756e6547 6c65746e 49656e69
00000001 000206a1 00000800 82982203 078bfbf9
00000002 00000001 00000000 00000000 002c307d
00000003 00000000 00000000 00000000 00000000
00000004 00000122 01c0003f 0000003f 00000001
00000005 00000000 00000000 00000003 00000000
00000006 00000000 00000000 00000000 00000000
00000007 00000000 00000000 00000000 00000000
00000008 00000000 00000000 00000000 00000000
00000009 00000000 00000000 00000000 00000000
0000000a 00000000 00000000 00000000 00000000
0000000b 00000000 00000000 00000000 00000000
0000000c 00000000 00000000 00000000 00000000
0000000d 00000000 00000000 00000000 00000000
80000000 8000000a 756e6547 6c65746e 49656e69
80000001 000206a1 00000000 00000001 28100800
80000002 65746e49 6558206c 45206e6f 78323133
80000003 53282078 79646e61 69724220 29656764
80000004 00000000 00000000 00000000 00000000
80000005 01ff01ff 01ff01ff 40020140 40020140
80000006 00000000 42004200 02008140 00000000
80000007 00000000 00000000 00000000 00000000
80000008 00003028 00000000 00000000 00000000
80000009 00000000 00000000 00000000 00000000
8000000a 00000000 00000000 00000000 00000000

Vendor ID: "GenuineIntel"; CPUID level 13

Intel-specific functions:
Version 000206a1:
Type 0 - Original OEM
Family 6 - Pentium Pro
Model 10 - 
Stepping 1
Reserved 8

Extended brand string: "Intel Xeon E312xx (Sandy Bridge)"
CLFLUSH instruction cache line size: 8

Feature flags 078bfbf9:
FPU    Floating Point Unit
PSE    Page Size Extensions
TSC    Time Stamp Counter
MSR    Model Specific Registers
PAE    Physical Address Extension
MCE    Machine Check Exception
CX8    COMPXCHG8B Instruction
APIC   On-chip Advanced Programmable Interrupt Controller present and enabled
SEP    Fast System Call
MTRR   Memory Type Range Registers
PGE    PTE Global Flag
MCA    Machine Check Architecture
CMOV   Conditional Move and Compare Instructions
FGPAT  Page Attribute Table
PSE-36 36-bit Page Size Extension
CLFSH  CFLUSH instruction
MMX    MMX instruction set
FXSR   Fast FP/MMX Streaming SIMD Extensions save/restore
SSE    Streaming SIMD Extensions instruction set
SSE2   SSE2 extensions

TLB and cache info:
7d: unknown TLB/cache descriptor
30: unknown TLB/cache descriptor
2c: unknown TLB/cache descriptor
Processor serial: 0002-06A1-0000-0000-0000-0000