Performance counters in kvm?

Performance counters in kvm?

[Binh Q. Pham]

Hi all,

I just started using kvm and want to use linux 'perf' tool inside the 
virtual machine to get some information about the hardware performance 
counters. I noticed in kvm source, there is pmu.c and pmu-stubs.c, so I 
assume they provide support for PMU. However, when I ran 'perf stat' in 
the VM, all hardware events are not supported. Sample screen shot:

perf stat /bin/ls
Performance counter stats for '/bin/ls':
<not supported> cycles
<not supported> stalled-cycles-frontend
....

Could someone clarify for me if I can use 'perf' in VM with the current 
kvm state?

Thanks for your help,
Binh

Re: Performance counters in kvm?

[Gleb Natapov]

On Wed, Nov 13, 2013 at 11:52:01AM -0500, Binh Q. Pham wrote:
> Hi all,
> 
> I just started using kvm and want to use linux 'perf' tool inside
> the virtual machine to get some information about the hardware
> performance counters. I noticed in kvm source, there is pmu.c and
> pmu-stubs.c, so I assume they provide support for PMU. However, when
> I ran 'perf stat' in the VM, all hardware events are not supported.
> Sample screen shot:
> 
> perf stat /bin/ls
> Performance counter stats for '/bin/ls':
> <not supported> cycles
> <not supported> stalled-cycles-frontend
> ....
> 
> Could someone clarify for me if I can use 'perf' in VM with the
> current kvm state?
> 
You need to specify host cpu type to QEMU: -cpu host.

--
			Gleb.

Re: Performance counters in kvm?

[Binh Q. Pham]

Hi Gleb,
Thanks for the suggestion, but I just tried to specify the cpu type to 
QEMU: -cpu host and I got the same output.

Binh
On 11/13/2013 12:54 PM, Gleb Natapov wrote:
> On Wed, Nov 13, 2013 at 11:52:01AM -0500, Binh Q. Pham wrote:
>> Hi all,
>>
>> I just started using kvm and want to use linux 'perf' tool inside
>> the virtual machine to get some information about the hardware
>> performance counters. I noticed in kvm source, there is pmu.c and
>> pmu-stubs.c, so I assume they provide support for PMU. However, when
>> I ran 'perf stat' in the VM, all hardware events are not supported.
>> Sample screen shot:
>>
>> perf stat /bin/ls
>> Performance counter stats for '/bin/ls':
>> <not supported> cycles
>> <not supported> stalled-cycles-frontend
>> ....
>>
>> Could someone clarify for me if I can use 'perf' in VM with the
>> current kvm state?
>>
> You need to specify host cpu type to QEMU: -cpu host.
>
> --
> 			Gleb.

Re: Performance counters in kvm?

[Gleb Natapov]

On Wed, Nov 13, 2013 at 10:22:54PM -0500, Binh Q. Pham wrote:
> Hi Gleb,
> Thanks for the suggestion, but I just tried to specify the cpu type
> to QEMU: -cpu host and I got the same output.
> 
Which QEMU version are you using, what is the output of "cat
/proc/cpuinfo" in the guest and attach guest's dmesg too.

> Binh
> On 11/13/2013 12:54 PM, Gleb Natapov wrote:
> >On Wed, Nov 13, 2013 at 11:52:01AM -0500, Binh Q. Pham wrote:
> >>Hi all,
> >>
> >>I just started using kvm and want to use linux 'perf' tool inside
> >>the virtual machine to get some information about the hardware
> >>performance counters. I noticed in kvm source, there is pmu.c and
> >>pmu-stubs.c, so I assume they provide support for PMU. However, when
> >>I ran 'perf stat' in the VM, all hardware events are not supported.
> >>Sample screen shot:
> >>
> >>perf stat /bin/ls
> >>Performance counter stats for '/bin/ls':
> >><not supported> cycles
> >><not supported> stalled-cycles-frontend
> >>....
> >>
> >>Could someone clarify for me if I can use 'perf' in VM with the
> >>current kvm state?
> >>
> >You need to specify host cpu type to QEMU: -cpu host.
> >
> >--
> >			Gleb.

--
			Gleb.

Re: Performance counters in kvm?

[Binh Q. Pham]

[-- Attachment #1: Type: text/plain, Size: 1442 bytes --]

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.

Thanks,
Binh
On 11/14/2013 02:16 AM, Gleb Natapov wrote:
> On Wed, Nov 13, 2013 at 10:22:54PM -0500, Binh Q. Pham wrote:
>> Hi Gleb,
>> Thanks for the suggestion, but I just tried to specify the cpu type
>> to QEMU: -cpu host and I got the same output.
>>
> Which QEMU version are you using, what is the output of "cat
> /proc/cpuinfo" in the guest and attach guest's dmesg too.
>
>> Binh
>> On 11/13/2013 12:54 PM, Gleb Natapov wrote:
>>> On Wed, Nov 13, 2013 at 11:52:01AM -0500, Binh Q. Pham wrote:
>>>> Hi all,
>>>>
>>>> I just started using kvm and want to use linux 'perf' tool inside
>>>> the virtual machine to get some information about the hardware
>>>> performance counters. I noticed in kvm source, there is pmu.c and
>>>> pmu-stubs.c, so I assume they provide support for PMU. However, when
>>>> I ran 'perf stat' in the VM, all hardware events are not supported.
>>>> Sample screen shot:
>>>>
>>>> perf stat /bin/ls
>>>> Performance counter stats for '/bin/ls':
>>>> <not supported> cycles
>>>> <not supported> stalled-cycles-frontend
>>>> ....
>>>>
>>>> Could someone clarify for me if I can use 'perf' in VM with the
>>>> current kvm state?
>>>>
>>> You need to specify host cpu type to QEMU: -cpu host.
>>>
>>> --
>>> 			Gleb.
> --
> 			Gleb.


[-- Attachment #2: cpuinfo.out --]
[-- Type: text/plain, Size: 568 bytes --]

processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 42
model name	: Intel Xeon E312xx (Sandy Bridge)
stepping	: 1
cpu MHz		: 3392.365
cache size	: 4096 KB
fpu		: yes
fpu_exception	: yes
cpuid level	: 13
wp		: yes
flags		: fpu pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx rdtscp lm constant_tsc rep_good nopl pni pclmulqdq ssse3 cx16 sse4_1 sse4_2 popcnt aes hypervisor lahf_lm
bogomips	: 6784.73
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:


[-- Attachment #3: dmesg.out --]
[-- Type: text/plain, Size: 25303 bytes --]

[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Linux version 3.8.0-29-generic (buildd@panlong) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #42~precise1-Ubuntu SMP Wed Aug 14 16:19:23 UTC 2013 (Ubuntu 3.8.0-29.42~precise1-generic 3.8.13.5)
[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.8.0-29-generic root=UUID=12c55b5b-2807-4bd3-becd-87224f111bdf ro
[    0.000000] KERNEL supported cpus:
[    0.000000]   Intel GenuineIntel
[    0.000000]   AMD AuthenticAMD
[    0.000000]   Centaur CentaurHauls
[    0.000000] e820: BIOS-provided physical RAM map:
[    0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable
[    0.000000] BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000000100000-0x000000007fffdfff] usable
[    0.000000] BIOS-e820: [mem 0x000000007fffe000-0x000000007fffffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fffc0000-0x00000000ffffffff] reserved
[    0.000000] NX (Execute Disable) protection: active
[    0.000000] SMBIOS 2.4 present.
[    0.000000] DMI: Bochs Bochs, BIOS Bochs 01/01/2011
[    0.000000] e820: update [mem 0x00000000-0x0000ffff] usable ==> reserved
[    0.000000] e820: remove [mem 0x000a0000-0x000fffff] usable
[    0.000000] No AGP bridge found
[    0.000000] e820: last_pfn = 0x7fffe max_arch_pfn = 0x400000000
[    0.000000] MTRR default type: write-back
[    0.000000] MTRR fixed ranges enabled:
[    0.000000]   00000-9FFFF write-back
[    0.000000]   A0000-BFFFF uncachable
[    0.000000]   C0000-FFFFF write-protect
[    0.000000] MTRR variable ranges enabled:
[    0.000000]   0 base 0080000000 mask FF80000000 uncachable
[    0.000000]   1 disabled
[    0.000000]   2 disabled
[    0.000000]   3 disabled
[    0.000000]   4 disabled
[    0.000000]   5 disabled
[    0.000000]   6 disabled
[    0.000000]   7 disabled
[    0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
[    0.000000] found SMP MP-table at [mem 0x000f1800-0x000f180f] mapped at [ffff8800000f1800]
[    0.000000] initial memory mapped: [mem 0x00000000-0x1fffffff]
[    0.000000] Base memory trampoline at [ffff880000099000] 99000 size 24576
[    0.000000] init_memory_mapping: [mem 0x00000000-0x7fffdfff]
[    0.000000]  [mem 0x00000000-0x7fdfffff] page 2M
[    0.000000]  [mem 0x7fe00000-0x7fffdfff] page 4k
[    0.000000] kernel direct mapping tables up to 0x7fffdfff @ [mem 0x1fffc000-0x1fffffff]
[    0.000000] RAMDISK: [mem 0x3615c000-0x370a5fff]
[    0.000000] ACPI: RSDP 00000000000f16a0 00014 (v00 BOCHS )
[    0.000000] ACPI: RSDT 000000007fffe450 00034 (v01 BOCHS  BXPCRSDT 00000001 BXPC 00000001)
[    0.000000] ACPI: FACP 000000007fffff80 00074 (v01 BOCHS  BXPCFACP 00000001 BXPC 00000001)
[    0.000000] ACPI: DSDT 000000007fffe490 01137 (v01   BXPC   BXDSDT 00000001 INTL 20100528)
[    0.000000] ACPI: FACS 000000007fffff40 00040
[    0.000000] ACPI: SSDT 000000007ffff700 00838 (v01 BOCHS  BXPCSSDT 00000001 BXPC 00000001)
[    0.000000] ACPI: APIC 000000007ffff610 00078 (v01 BOCHS  BXPCAPIC 00000001 BXPC 00000001)
[    0.000000] ACPI: HPET 000000007ffff5d0 00038 (v01 BOCHS  BXPCHPET 00000001 BXPC 00000001)
[    0.000000] ACPI: Local APIC address 0xfee00000
[    0.000000] No NUMA configuration found
[    0.000000] Faking a node at [mem 0x0000000000000000-0x000000007fffdfff]
[    0.000000] Initmem setup node 0 [mem 0x00000000-0x7fffdfff]
[    0.000000]   NODE_DATA [mem 0x7fff9000-0x7fffdfff]
[    0.000000]  [ffffea0000000000-ffffea0001ffffff] PMD -> [ffff88007d600000-ffff88007f5fffff] on node 0
[    0.000000] Zone ranges:
[    0.000000]   DMA      [mem 0x00010000-0x00ffffff]
[    0.000000]   DMA32    [mem 0x01000000-0xffffffff]
[    0.000000]   Normal   empty
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x00010000-0x0009efff]
[    0.000000]   node   0: [mem 0x00100000-0x7fffdfff]
[    0.000000] On node 0 totalpages: 524173
[    0.000000]   DMA zone: 64 pages used for memmap
[    0.000000]   DMA zone: 6 pages reserved
[    0.000000]   DMA zone: 3913 pages, LIFO batch:0
[    0.000000]   DMA32 zone: 8128 pages used for memmap
[    0.000000]   DMA32 zone: 512062 pages, LIFO batch:31
[    0.000000] ACPI: PM-Timer IO Port: 0xb008
[    0.000000] ACPI: Local APIC address 0xfee00000
[    0.000000] ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1])
[    0.000000] ACPI: IOAPIC (id[0x00] address[0xfec00000] gsi_base[0])
[    0.000000] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23
[    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
[    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
[    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
[    0.000000] ACPI: IRQ0 used by override.
[    0.000000] ACPI: IRQ2 used by override.
[    0.000000] ACPI: IRQ5 used by override.
[    0.000000] ACPI: IRQ9 used by override.
[    0.000000] ACPI: IRQ10 used by override.
[    0.000000] ACPI: IRQ11 used by override.
[    0.000000] Using ACPI (MADT) for SMP configuration information
[    0.000000] ACPI: HPET id: 0x8086a201 base: 0xfed00000
[    0.000000] smpboot: Allowing 1 CPUs, 0 hotplug CPUs
[    0.000000] nr_irqs_gsi: 40
[    0.000000] PM: Registered nosave memory: 000000000009f000 - 00000000000a0000
[    0.000000] PM: Registered nosave memory: 00000000000a0000 - 00000000000f0000
[    0.000000] PM: Registered nosave memory: 00000000000f0000 - 0000000000100000
[    0.000000] e820: [mem 0x80000000-0xfffbffff] available for PCI devices
[    0.000000] Booting paravirtualized kernel on bare hardware
[    0.000000] setup_percpu: NR_CPUS:256 nr_cpumask_bits:256 nr_cpu_ids:1 nr_node_ids:1
[    0.000000] PERCPU: Embedded 28 pages/cpu @ffff88007fc00000 s85056 r8192 d21440 u2097152
[    0.000000] pcpu-alloc: s85056 r8192 d21440 u2097152 alloc=1*2097152
[    0.000000] pcpu-alloc: [0] 0 
[    0.000000] Built 1 zonelists in Node order, mobility grouping on.  Total pages: 515975
[    0.000000] Policy zone: DMA32
[    0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.8.0-29-generic root=UUID=12c55b5b-2807-4bd3-becd-87224f111bdf ro
[    0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[    0.000000] __ex_table already sorted, skipping sort
[    0.000000] Checking aperture...
[    0.000000] No AGP bridge found
[    0.000000] Calgary: detecting Calgary via BIOS EBDA area
[    0.000000] Calgary: Unable to locate Rio Grande table in EBDA - bailing!
[    0.000000] Memory: 2032316k/2097144k available (7170k kernel code, 452k absent, 64376k reserved, 6073k data, 1012k init)
[    0.000000] SLUB: Genslabs=15, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] Hierarchical RCU implementation.
[    0.000000] 	RCU dyntick-idle grace-period acceleration is enabled.
[    0.000000] 	RCU restricting CPUs from NR_CPUS=256 to nr_cpu_ids=1.
[    0.000000] NR_IRQS:16640 nr_irqs:256 16
[    0.000000] Console: colour VGA+ 80x25
[    0.000000] console [tty0] enabled
[    0.000000] allocated 8388608 bytes of page_cgroup
[    0.000000] please try 'cgroup_disable=memory' option if you don't want memory cgroups
[    0.000000] hpet clockevent registered
[    0.000000] tsc: Fast TSC calibration using PIT
[    0.000000] tsc: Detected 3392.365 MHz processor
[    0.008436] Calibrating delay loop (skipped), value calculated using timer frequency.. 6784.73 BogoMIPS (lpj=13569460)
[    0.012490] pid_max: default: 32768 minimum: 301
[    0.015584] Security Framework initialized
[    0.017357] AppArmor: AppArmor initialized
[    0.017425] Yama: becoming mindful.
[    0.022379] Dentry cache hash table entries: 262144 (order: 9, 2097152 bytes)
[    0.025732] Inode-cache hash table entries: 131072 (order: 8, 1048576 bytes)
[    0.027598] Mount-cache hash table entries: 256
[    0.033751] Initializing cgroup subsys cpuacct
[    0.033904] Initializing cgroup subsys memory
[    0.034374] Initializing cgroup subsys devices
[    0.034459] Initializing cgroup subsys freezer
[    0.034570] Initializing cgroup subsys blkio
[    0.034637] Initializing cgroup subsys perf_event
[    0.034728] Initializing cgroup subsys hugetlb
[    0.036441] mce: CPU supports 10 MCE banks
[    0.037444] Last level iTLB entries: 4KB 0, 2MB 0, 4MB 0
[    0.037444] Last level dTLB entries: 4KB 0, 2MB 0, 4MB 0
[    0.037444] tlb_flushall_shift: 5
[    0.238001] Freeing SMP alternatives: 24k freed
[    0.248119] ACPI: Core revision 20121018
[    0.269009] ftrace: allocating 29358 entries in 115 pages
[    0.342114] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
[    0.382710] smpboot: CPU0: Intel Xeon E312xx (Sandy Bridge) (fam: 06, model: 2a, stepping: 01)
[    0.384000] Performance Events: unsupported p6 CPU model 42 no PMU driver, software events only.
[    0.394815] Brought up 1 CPUs
[    0.394919] smpboot: Total of 1 processors activated (6784.73 BogoMIPS)
[    0.398941] NMI watchdog: disabled (cpu0): hardware events not enabled
[    0.405694] devtmpfs: initialized
[    0.413603] EVM: security.selinux
[    0.413642] EVM: security.SMACK64
[    0.413674] EVM: security.capability
[    0.423843] regulator-dummy: no parameters
[    0.425648] NET: Registered protocol family 16
[    0.434542] ACPI: bus type pci registered
[    0.435823] PCI: Using configuration type 1 for base access
[    0.447772] bio: create slab <bio-0> at 0
[    0.449675] ACPI: Added _OSI(Module Device)
[    0.449731] ACPI: Added _OSI(Processor Device)
[    0.449772] ACPI: Added _OSI(3.0 _SCP Extensions)
[    0.449812] ACPI: Added _OSI(Processor Aggregator Device)
[    0.454504] ACPI: EC: Look up EC in DSDT
[    0.482043] ACPI: Interpreter enabled
[    0.482120] ACPI: (supports S0 S3 S4 S5)
[    0.482683] ACPI: Using IOAPIC for interrupt routing
[    0.513621] ACPI: No dock devices found.
[    0.513752] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[    0.515540] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[    0.515631] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
[    0.524296] pci_root PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge.
[    0.525047] PCI host bridge to bus 0000:00
[    0.525219] pci_bus 0000:00: root bus resource [bus 00-ff]
[    0.525364] pci_bus 0000:00: root bus resource [io  0x0000-0x0cf7]
[    0.525413] pci_bus 0000:00: root bus resource [io  0x0d00-0xffff]
[    0.525466] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff]
[    0.525515] pci_bus 0000:00: root bus resource [mem 0x80000000-0xfebfffff]
[    0.525976] pci 0000:00:00.0: [8086:1237] type 00 class 0x060000
[    0.526955] pci 0000:00:01.0: [8086:7000] type 00 class 0x060100
[    0.527153] pci 0000:00:01.1: [8086:7010] type 00 class 0x010180
[    0.528990] pci 0000:00:01.1: reg 20: [io  0xc040-0xc04f]
[    0.529789] pci 0000:00:01.3: [8086:7113] type 00 class 0x068000
[    0.530069] pci 0000:00:01.3: quirk: [io  0xb000-0xb03f] claimed by PIIX4 ACPI
[    0.530153] pci 0000:00:01.3: quirk: [io  0xb100-0xb10f] claimed by PIIX4 SMB
[    0.530300] pci 0000:00:02.0: [1013:00b8] type 00 class 0x030000
[    0.530999] pci 0000:00:02.0: reg 10: [mem 0xfc000000-0xfdffffff pref]
[    0.531654] pci 0000:00:02.0: reg 14: [mem 0xfebf0000-0xfebf0fff]
[    0.534845] pci 0000:00:02.0: reg 30: [mem 0xfebe0000-0xfebeffff pref]
[    0.534916] pci 0000:00:03.0: [8086:100e] type 00 class 0x020000
[    0.535574] pci 0000:00:03.0: reg 10: [mem 0xfeba0000-0xfebbffff]
[    0.536346] pci 0000:00:03.0: reg 14: [io  0xc000-0xc03f]
[    0.539493] pci 0000:00:03.0: reg 30: [mem 0xfebc0000-0xfebdffff pref]
[    0.541414]  pci0000:00: ACPI _OSC support notification failed, disabling PCIe ASPM
[    0.541504]  pci0000:00: Unable to request _OSC control (_OSC support mask: 0x08)
[    0.545202] ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11)
[    0.548133] ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11)
[    0.548634] ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11)
[    0.549120] ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11)
[    0.549400] ACPI: PCI Interrupt Link [LNKS] (IRQs *9)
[    0.552104] vgaarb: device added: PCI:0000:00:02.0,decodes=io+mem,owns=io+mem,locks=none
[    0.552189] vgaarb: loaded
[    0.552240] vgaarb: bridge control possible 0000:00:02.0
[    0.554707] SCSI subsystem initialized
[    0.554808] ACPI: bus type scsi registered
[    0.555312] libata version 3.00 loaded.
[    0.555567] ACPI: bus type usb registered
[    0.556093] usbcore: registered new interface driver usbfs
[    0.556335] usbcore: registered new interface driver hub
[    0.556613] usbcore: registered new device driver usb
[    0.558066] PCI: Using ACPI for IRQ routing
[    0.558199] PCI: pci_cache_line_size set to 64 bytes
[    0.558516] e820: reserve RAM buffer [mem 0x0009fc00-0x0009ffff]
[    0.558624] e820: reserve RAM buffer [mem 0x7fffe000-0x7fffffff]
[    0.562850] NetLabel: Initializing
[    0.562894] NetLabel:  domain hash size = 128
[    0.562932] NetLabel:  protocols = UNLABELED CIPSOv4
[    0.563580] NetLabel:  unlabeled traffic allowed by default
[    0.564280] HPET: 3 timers in total, 0 timers will be used for per-cpu timer
[    0.564481] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0
[    0.564612] hpet0: 3 comparators, 64-bit 100.000000 MHz counter
[    0.569215] Switching to clocksource hpet
[    0.646466] AppArmor: AppArmor Filesystem Enabled
[    0.646967] pnp: PnP ACPI init
[    0.647122] ACPI: bus type pnp registered
[    0.648876] pnp 00:00: Plug and Play ACPI device, IDs PNP0b00 (active)
[    0.649241] pnp 00:01: Plug and Play ACPI device, IDs PNP0303 (active)
[    0.649508] pnp 00:02: Plug and Play ACPI device, IDs PNP0f13 (active)
[    0.649899] pnp 00:03: [dma 2]
[    0.650046] pnp 00:03: Plug and Play ACPI device, IDs PNP0700 (active)
[    0.650406] pnp 00:04: Plug and Play ACPI device, IDs PNP0400 (active)
[    0.650767] pnp 00:05: Plug and Play ACPI device, IDs PNP0501 (active)
[    0.652155] pnp 00:06: Plug and Play ACPI device, IDs PNP0103 (active)
[    0.652879] pnp: PnP ACPI: found 7 devices
[    0.652951] ACPI: ACPI bus type pnp unregistered
[    0.678234] pci_bus 0000:00: resource 4 [io  0x0000-0x0cf7]
[    0.678267] pci_bus 0000:00: resource 5 [io  0x0d00-0xffff]
[    0.678286] pci_bus 0000:00: resource 6 [mem 0x000a0000-0x000bffff]
[    0.678303] pci_bus 0000:00: resource 7 [mem 0x80000000-0xfebfffff]
[    0.678728] NET: Registered protocol family 2
[    0.681716] TCP established hash table entries: 16384 (order: 6, 262144 bytes)
[    0.682223] TCP bind hash table entries: 16384 (order: 6, 262144 bytes)
[    0.682608] TCP: Hash tables configured (established 16384 bind 16384)
[    0.682881] TCP: reno registered
[    0.683039] UDP hash table entries: 1024 (order: 3, 32768 bytes)
[    0.683206] UDP-Lite hash table entries: 1024 (order: 3, 32768 bytes)
[    0.684675] NET: Registered protocol family 1
[    0.684913] pci 0000:00:00.0: Limiting direct PCI/PCI transfers
[    0.685161] pci 0000:00:01.0: PIIX3: Enabling Passive Release
[    0.685293] pci 0000:00:01.0: Activating ISA DMA hang workarounds
[    0.685393] pci 0000:00:02.0: Boot video device
[    0.685479] PCI: CLS 0 bytes, default 64
[    0.688248] Trying to unpack rootfs image as initramfs...
[    1.679308] Freeing initrd memory: 15656k freed
[    1.693095] Initialise module verification
[    1.694099] audit: initializing netlink socket (disabled)
[    1.694642] type=2000 audit(1384445421.692:1): initialized
[    1.786602] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[    1.800911] VFS: Disk quotas dquot_6.5.2
[    1.801279] Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[    1.808520] fuse init (API version 7.20)
[    1.809359] msgmni has been set to 3999
[    1.812626] Key type asymmetric registered
[    1.812707] Asymmetric key parser 'x509' registered
[    1.813081] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252)
[    1.813543] io scheduler noop registered
[    1.813618] io scheduler deadline registered (default)
[    1.813756] io scheduler cfq registered
[    1.815049] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
[    1.815797] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
[    1.816604] intel_idle: does not run on family 6 model 42
[    1.817916] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
[    1.818361] ACPI: Power Button [PWRF]
[    1.835825] GHES: HEST is not enabled!
[    1.836936] Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled
[    1.859002] 00:05: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[    1.874586] Linux agpgart interface v0.103
[    1.886900] brd: module loaded
[    1.892426] loop: module loaded
[    1.895123] ata_piix 0000:00:01.1: version 2.13
[    1.897372] ata_piix 0000:00:01.1: setting latency timer to 64
[    1.900649] scsi0 : ata_piix
[    1.901551] scsi1 : ata_piix
[    1.902011] ata1: PATA max MWDMA2 cmd 0x1f0 ctl 0x3f6 bmdma 0xc040 irq 14
[    1.902085] ata2: PATA max MWDMA2 cmd 0x170 ctl 0x376 bmdma 0xc048 irq 15
[    1.907388] libphy: Fixed MDIO Bus: probed
[    1.908239] tun: Universal TUN/TAP device driver, 1.6
[    1.908287] tun: (C) 1999-2004 Max Krasnyansky <maxk@qualcomm.com>
[    1.909121] PPP generic driver version 2.4.2
[    1.909633] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    1.909705] ehci-pci: EHCI PCI platform driver
[    1.909871] ehci-platform: EHCI generic platform driver
[    1.909988] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    1.910192] uhci_hcd: USB Universal Host Controller Interface driver
[    1.911038] i8042: PNP: PS/2 Controller [PNP0303:KBD,PNP0f13:MOU] at 0x60,0x64 irq 1,12
[    1.913056] serio: i8042 KBD port at 0x60,0x64 irq 1
[    1.913247] serio: i8042 AUX port at 0x60,0x64 irq 12
[    1.914459] mousedev: PS/2 mouse device common for all mice
[    1.916745] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input1
[    1.918073] rtc_cmos 00:00: RTC can wake from S4
[    1.919476] rtc_cmos 00:00: rtc core: registered rtc_cmos as rtc0
[    1.919869] rtc0: alarms up to one day, 114 bytes nvram, hpet irqs
[    1.920751] device-mapper: uevent: version 1.0.3
[    1.921419] device-mapper: ioctl: 4.23.1-ioctl (2012-12-18) initialised: dm-devel@redhat.com
[    1.921848] cpuidle: using governor ladder
[    1.921936] cpuidle: using governor menu
[    1.922087] ledtrig-cpu: registered to indicate activity on CPUs
[    1.922141] EFI Variables Facility v0.08 2004-May-17
[    1.928867] ashmem: initialized
[    1.930028] TCP: cubic registered
[    1.930859] NET: Registered protocol family 10
[    1.934725] NET: Registered protocol family 17
[    1.934992] Key type dns_resolver registered
[    1.937095] Loading module verification certificates
[    1.943491] MODSIGN: Loaded cert 'Magrathea: Glacier signing key: 38550890b1fce75cc801d8fb942703db919b9386'
[    1.943730] registered taskstats version 1
[    2.054934] Key type trusted registered
[    2.065419] ata1.01: NODEV after polling detection
[    2.067843] ata2.01: NODEV after polling detection
[    2.068819] ata2.00: ATAPI: QEMU DVD-ROM, 1.5.0, max UDMA/100
[    2.074810] ata1.00: ATA-7: QEMU HARDDISK, 1.5.0, max UDMA/100
[    2.075195] ata1.00: 20971520 sectors, multi 16: LBA48 
[    2.076631] ata2.00: configured for MWDMA2
[    2.084680] ata1.00: configured for MWDMA2
[    2.093410] scsi 0:0:0:0: Direct-Access     ATA      QEMU HARDDISK    1.5. PQ: 0 ANSI: 5
[    2.095924] sd 0:0:0:0: [sda] 20971520 512-byte logical blocks: (10.7 GB/10.0 GiB)
[    2.097607] sd 0:0:0:0: [sda] Write Protect is off
[    2.097675] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[    2.098058] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[    2.107120] sd 0:0:0:0: Attached scsi generic sg0 type 0
[    2.109608] scsi 1:0:0:0: CD-ROM            QEMU     QEMU DVD-ROM     1.5. PQ: 0 ANSI: 5
[    2.112475] sr0: scsi3-mmc drive: 4x/4x cd/rw xa/form2 tray
[    2.112625] cdrom: Uniform CD-ROM driver Revision: 3.20
[    2.113566] sr 1:0:0:0: Attached scsi CD-ROM sr0
[    2.119262]  sda: sda1 sda2 < sda5 >
[    2.119833] sr 1:0:0:0: Attached scsi generic sg1 type 5
[    2.132303] sd 0:0:0:0: [sda] Attached SCSI disk
[    2.157968] Key type encrypted registered
[    2.212341] rtc_cmos 00:00: setting system clock to 2013-11-14 16:10:22 UTC (1384445422)
[    2.213767] BIOS EDD facility v0.16 2004-Jun-25, 0 devices found
[    2.213827] EDD information not available.
[    2.230836] Freeing unused kernel memory: 1012k freed
[    2.245628] Write protecting the kernel read-only data: 12288k
[    2.308449] Freeing unused kernel memory: 1012k freed
[    2.397793] Freeing unused kernel memory: 1008k freed
[    2.688585] tsc: Refined TSC clocksource calibration: 3392.303 MHz
[    2.688900] Switching to clocksource tsc
[    3.031115] udevd[93]: starting version 175
[    5.421498] Disabling lock debugging due to kernel taint
[    5.554499] e1000: Intel(R) PRO/1000 Network Driver - version 7.3.21-k8-NAPI
[    5.555973] e1000: Copyright (c) 1999-2006 Intel Corporation.
[    5.739723] ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 11
[    5.792451] e1000 0000:00:03.0: setting latency timer to 64
[    6.267370] e1000 0000:00:03.0 eth0: (PCI:33MHz:32-bit) 52:54:00:12:34:56
[    6.267598] e1000 0000:00:03.0 eth0: Intel(R) PRO/1000 Network Connection
[    7.170163] Floppy drive(s): fd0 is 1.44M
[    7.191924] FDC 0 is a S82078B
[    7.676279] EXT4-fs (sda1): INFO: recovery required on readonly filesystem
[    7.676456] EXT4-fs (sda1): write access will be enabled during recovery
[    7.868826] EXT4-fs (sda1): recovery complete
[    7.885820] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
[   10.182058] init: ureadahead main process (232) terminated with status 5
[   13.110248] Adding 2095100k swap on /dev/sda5.  Priority:-1 extents:1 across:2095100k 
[   13.337297] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro
[   16.382766] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   16.493638] udevd[344]: starting version 175
[   19.542790] lp: driver loaded but no devices found
[   25.941739] piix4_smbus 0000:00:01.3: SMBus Host Controller at 0xb100, revision 0
[   26.433495] [drm] Initialized drm 1.1.0 20060810
[   27.960715] input: ImExPS/2 Generic Explorer Mouse as /devices/platform/i8042/serio1/input/input2
[   28.620764] [TTM] Zone  kernel: Available graphics memory: 1025514 kiB
[   28.620889] [TTM] Initializing pool allocator
[   28.621031] [TTM] Initializing DMA pool allocator
[   29.749847] type=1400 audit(1384445450.035:2): apparmor="STATUS" operation="profile_load" name="/sbin/dhclient" pid=528 comm="apparmor_parser"
[   29.763995] type=1400 audit(1384445450.047:3): apparmor="STATUS" operation="profile_load" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=528 comm="apparmor_parser"
[   29.774061] type=1400 audit(1384445450.059:4): apparmor="STATUS" operation="profile_load" name="/usr/lib/connman/scripts/dhclient-script" pid=528 comm="apparmor_parser"
[   30.054775] [drm] fb mappable at 0x0
[   30.054843] [drm] vram aper at 0x0
[   30.054859] [drm] size 0
[   30.054876] [drm] fb depth is 24
[   30.054890] [drm]    pitch is 3840
[   30.655887] fbcon: cirrusdrmfb (fb0) is primary device
[   35.112700] Console: switching to colour frame buffer device 160x64
[   35.131443] cirrus 0000:00:02.0: fb0: cirrusdrmfb frame buffer device
[   35.131562] cirrus 0000:00:02.0: registered panic notifier
[   38.161344] microcode: CPU0 sig=0x206a1, pf=0x1, revision=0x0
[   38.455726] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   38.928480] [drm] Initialized cirrus 1.0.0 20110418 for 0000:00:02.0 on minor 0
[   40.461321] e1000: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
[   40.463035] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[   44.605492] parport_pc 00:04: reported by Plug and Play ACPI
[   44.606381] parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE]
[   44.988867] lp0: using parport0 (interrupt-driven).
[   48.287563] microcode: Microcode Update Driver: v2.00 <tigran@aivazian.fsnet.co.uk>, Peter Oruba
[   48.604392] ppdev: user-space parallel port driver
[   50.828448] init: failsafe main process (545) killed by TERM signal
[   53.927979] type=1400 audit(1384445474.211:5): apparmor="STATUS" operation="profile_replace" name="/sbin/dhclient" pid=845 comm="apparmor_parser"
[   53.935706] type=1400 audit(1384445474.219:6): apparmor="STATUS" operation="profile_replace" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=845 comm="apparmor_parser"
[   53.941989] type=1400 audit(1384445474.227:7): apparmor="STATUS" operation="profile_replace" name="/usr/lib/connman/scripts/dhclient-script" pid=845 comm="apparmor_parser"
[   54.141417] type=1400 audit(1384445474.427:8): apparmor="STATUS" operation="profile_load" name="/usr/sbin/tcpdump" pid=847 comm="apparmor_parser"

Re: Performance counters in kvm?

[Gleb Natapov]

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.

Re: Performance counters in kvm?

[Binh Q. Pham]

[-- 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

Re: Performance counters in kvm?

[Gleb Natapov]

On Thu, Nov 14, 2013 at 12:04:50PM -0500, Binh Q. Pham wrote:
> cpuid output is attached.
PMU support is not advertised to the guest which means that either
QEMU is broken or your host kernel does not have PMU kvm support. What is
your host kernel version?

> 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?
> 
I am surprised ubuntu kernel does not have virtualiztion support
compiled in. May be they have separate kernel for that, but I am not
ubuntu user so cannot tell.


--
			Gleb.

Re: Performance counters in kvm?

[Binh Q. Pham]

My host kernel version is 3.10.17

Binh
On 11/14/2013 12:21 PM, Gleb Natapov wrote:
> On Thu, Nov 14, 2013 at 12:04:50PM -0500, Binh Q. Pham wrote:
>> cpuid output is attached.
> PMU support is not advertised to the guest which means that either
> QEMU is broken or your host kernel does not have PMU kvm support. What is
> your host kernel version?
>
>> 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?
>>
> I am surprised ubuntu kernel does not have virtualiztion support
> compiled in. May be they have separate kernel for that, but I am not
> ubuntu user so cannot tell.
>
>
> --
> 			Gleb.

Re: Performance counters in kvm?

[Gleb Natapov]

On Thu, Nov 14, 2013 at 03:31:01PM -0500, Binh Q. Pham wrote:
> My host kernel version is 3.10.17
> 
That one surely has PMU emulation, but your guest does not see it. I blame
QEMU. Can you compile QEMU from git?

> Binh
> On 11/14/2013 12:21 PM, Gleb Natapov wrote:
> >On Thu, Nov 14, 2013 at 12:04:50PM -0500, Binh Q. Pham wrote:
> >>cpuid output is attached.
> >PMU support is not advertised to the guest which means that either
> >QEMU is broken or your host kernel does not have PMU kvm support. What is
> >your host kernel version?
> >
> >>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?
> >>
> >I am surprised ubuntu kernel does not have virtualiztion support
> >compiled in. May be they have separate kernel for that, but I am not
> >ubuntu user so cannot tell.
> >
> >
> >--
> >			Gleb.

--
			Gleb.

Re: Performance counters in kvm?

[Binh Q. Pham]

Sorry for a late response as I was distracted by another task in the 
last few weeks. Today, I compiled and installed QEMU 1.7.0 from source, 
but no luck with this. Tested on a different machine with different 
kernel version: 3.2, I got the same results.

Btw, I found bug 798936 which describes similar problem here:
bugzilla.redhat.com/show_bug.cgi?id=798936

it seems like this problem has been detected and resolved in the past. 
Do you know what Linux distro/kernel that the bug was resolved on? Maybe 
I can try that instead of using ubuntu to see if it works.

Thanks,
Binh
On 11/14/2013 04:08 PM, Gleb Natapov wrote:
> On Thu, Nov 14, 2013 at 03:31:01PM -0500, Binh Q. Pham wrote:
>> My host kernel version is 3.10.17
>>
> That one surely has PMU emulation, but your guest does not see it. I blame
> QEMU. Can you compile QEMU from git?
>
>> Binh
>> On 11/14/2013 12:21 PM, Gleb Natapov wrote:
>>> On Thu, Nov 14, 2013 at 12:04:50PM -0500, Binh Q. Pham wrote:
>>>> cpuid output is attached.
>>> PMU support is not advertised to the guest which means that either
>>> QEMU is broken or your host kernel does not have PMU kvm support. What is
>>> your host kernel version?
>>>
>>>> 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?
>>>>
>>> I am surprised ubuntu kernel does not have virtualiztion support
>>> compiled in. May be they have separate kernel for that, but I am not
>>> ubuntu user so cannot tell.
>>>
>>>
>>> --
>>> 			Gleb.
> --
> 			Gleb.


-- 
-Binh

Re: Performance counters in kvm?

[Gleb Natapov]

On Mon, Dec 09, 2013 at 01:59:41PM -0500, Binh Q. Pham wrote:
> Sorry for a late response as I was distracted by another task in the
> last few weeks. Today, I compiled and installed QEMU 1.7.0 from
> source, but no luck with this. Tested on a different machine with
> different kernel version: 3.2, I got the same results.
What do you mean by "different kernel version: 3.2"?

> 
> Btw, I found bug 798936 which describes similar problem here:
> bugzilla.redhat.com/show_bug.cgi?id=798936
> 
> it seems like this problem has been detected and resolved in the
> past. Do you know what Linux distro/kernel that the bug was resolved
> on? Maybe I can try that instead of using ubuntu to see if it works.
> 
The fix is present in QEMU 1.7.0.

> Thanks,
> Binh
> On 11/14/2013 04:08 PM, Gleb Natapov wrote:
> >On Thu, Nov 14, 2013 at 03:31:01PM -0500, Binh Q. Pham wrote:
> >>My host kernel version is 3.10.17
> >>
> >That one surely has PMU emulation, but your guest does not see it. I blame
> >QEMU. Can you compile QEMU from git?
> >
> >>Binh
> >>On 11/14/2013 12:21 PM, Gleb Natapov wrote:
> >>>On Thu, Nov 14, 2013 at 12:04:50PM -0500, Binh Q. Pham wrote:
> >>>>cpuid output is attached.
> >>>PMU support is not advertised to the guest which means that either
> >>>QEMU is broken or your host kernel does not have PMU kvm support. What is
> >>>your host kernel version?
> >>>
> >>>>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?
> >>>>
> >>>I am surprised ubuntu kernel does not have virtualiztion support
> >>>compiled in. May be they have separate kernel for that, but I am not
> >>>ubuntu user so cannot tell.
> >>>
> >>>
> >>>--
> >>>			Gleb.
> >--
> >			Gleb.
> 
> 
> -- 
> -Binh
> 
> --
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

--
			Gleb.

Re: Performance counters in kvm?

[Binh Q. Pham]

On 12/10/2013 05:59 AM, Gleb Natapov wrote:
> On Mon, Dec 09, 2013 at 01:59:41PM -0500, Binh Q. Pham wrote:
>> Sorry for a late response as I was distracted by another task in the
>> last few weeks. Today, I compiled and installed QEMU 1.7.0 from
>> source, but no luck with this. Tested on a different machine with
>> different kernel version: 3.2, I got the same results.
> What do you mean by "different kernel version: 3.2"?

Oh, previously, I tried with kernel 3.10. Then I had another machine 
with 3.2, so I tried QEMU 1.7.0 on both, but no luck.
>
>> Btw, I found bug 798936 which describes similar problem here:
>> bugzilla.redhat.com/show_bug.cgi?id=798936
>>
>> it seems like this problem has been detected and resolved in the
>> past. Do you know what Linux distro/kernel that the bug was resolved
>> on? Maybe I can try that instead of using ubuntu to see if it works.
>>
> The fix is present in QEMU 1.7.0.
>
>> Thanks,
>> Binh
>> On 11/14/2013 04:08 PM, Gleb Natapov wrote:
>>> On Thu, Nov 14, 2013 at 03:31:01PM -0500, Binh Q. Pham wrote:
>>>> My host kernel version is 3.10.17
>>>>
>>> That one surely has PMU emulation, but your guest does not see it. I blame
>>> QEMU. Can you compile QEMU from git?
>>>
>>>> Binh
>>>> On 11/14/2013 12:21 PM, Gleb Natapov wrote:
>>>>> On Thu, Nov 14, 2013 at 12:04:50PM -0500, Binh Q. Pham wrote:
>>>>>> cpuid output is attached.
>>>>> PMU support is not advertised to the guest which means that either
>>>>> QEMU is broken or your host kernel does not have PMU kvm support. What is
>>>>> your host kernel version?
>>>>>
>>>>>> 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?
>>>>>>
>>>>> I am surprised ubuntu kernel does not have virtualiztion support
>>>>> compiled in. May be they have separate kernel for that, but I am not
>>>>> ubuntu user so cannot tell.
>>>>>
>>>>>
>>>>> --
>>>>> 			Gleb.
>>> --
>>> 			Gleb.
>>
>> -- 
>> -Binh
>>
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> --
> 			Gleb.