the address is the Region 1 of virtio_net.
why virtio_net use this address caused ept violation?
00:04.0 Ethernet controller: Unknown device 1af4:1000
Subsystem: Unknown device 1af4:0001
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Interrupt: pin A routed to IRQ 11
Region 0: I/O ports at c040 [size=32]
Region 1: Memory at f2020000 (32-bit, non-prefetchable) [size=4K]
Expansion ROM at f2030000 [disabled] [size=64K]
Capabilities: [40] MSI-X: Enable+ Mask- TabSize=3
Vector table: BAR=1 offset=00000000
PBA: BAR=1 offset=00000800
00:08.0 Ethernet controller: Unknown device 1af4:1000
Subsystem: Unknown device 1af4:0001
Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Interrupt: pin A routed to IRQ 11
Region 0: I/O ports at c0c0 [size=32]
Region 1: Memory at f20a0000 (32-bit, non-prefetchable) [size=4K]
Expansion ROM at f20b0000 [disabled] [size=64K]
Capabilities: [40] MSI-X: Enable+ Mask- TabSize=3
Vector table: BAR=1 offset=00000000
PBA: BAR=1 offset=00000800
2010/11/15, lidong chen <[email protected]>:
> the gpa caused ept violation is below:
>
> most of them is F2020000.(4060217344)
>
> error gpa is 4060217344
> error gpa is 4060217344
> error gpa is 4060217344
> error gpa is 4060217344
> error gpa is 4060217344
> error gpa is 4060217344
> error gpa is 4060217344
> error gpa is 4060217344
> error gpa is 4060217344
> error gpa is 4060217344
>
> other is F20A0000(4060741632).
>
> error gpa is 4060741632
> error gpa is 4060741632
>
>
> 2010/11/15, lidong chen <[email protected]>:
>> i use the virtio dirvier of rhle6, the guest os version is 2.6.16.
>>
>> the vm exits which caused by io instruction and apic access reduce a lot.
>> the total number of vm exits decreased by 50% :)
>>
>> but the ept violation seem increase on cpu 0, cpu 1, cpu 2, cpu3.
>>
>> (KVM)100000 times on cpu 2,
>> 0, 1989
>> 1, 9937
>> 7, 7951
>> 12, 2709
>> 28, 20
>> 30, 18536
>> 44, 29058
>> 48, 29800
>>
>> and not all cpu have this problem: cpu4,cpu5,cpu6,cpu7
>> 100000 times on cpu 5,
>> 0, 13934
>> 1, 35955
>> 7, 26
>> 12, 3841
>> 28, 11224
>> 30, 29389
>> 44, 5631
>>
>> I bind vcpu like this:
>> virsh vcpupin brd1vm4 0 7
>> virsh vcpupin brd3vm4 0 0
>> virsh vcpupin brd3vm4 1 4
>> virsh vcpupin brd5vm4 0 1
>> virsh vcpupin brd5vm4 1 5
>> virsh vcpupin brd9vm4 0 2
>> virsh vcpupin brd9vm4 1 6
>> virsh vcpupin brd11vm4 0 3
>> virsh vcpupin brd11vm4 1 7
>>
>> the /proc/interrupt of guest os is below:
>> CPU0 CPU1
>> 0: 1896802 0 IO-APIC-edge timer
>> 1: 8 0 IO-APIC-edge i8042
>> 4: 14 0 IO-APIC-edge serial
>> 8: 0 0 IO-APIC-edge rtc
>> 9: 0 0 IO-APIC-level acpi
>> 10: 0 0 IO-APIC-level virtio1, virtio2, virtio5
>> 11: 1 0 IO-APIC-level virtio0, virtio3, virtio4
>> 12: 104 0 IO-APIC-edge i8042
>> 50: 1 0 PCI-MSI-X virtio2-output
>> 58: 0 0 PCI-MSI-X virtio3-config
>> 66: 2046985 0 PCI-MSI-X virtio3-input
>> 74: 2 0 PCI-MSI-X virtio3-output
>> 82: 0 0 PCI-MSI-X virtio4-config
>> 90: 217 0 PCI-MSI-X virtio4-input
>> 98: 0 0 PCI-MSI-X virtio4-output
>> 177: 0 0 PCI-MSI-X virtio0-config
>> 185: 341831 0 PCI-MSI-X virtio0-input
>> 193: 1 0 PCI-MSI-X virtio0-output
>> 201: 0 0 PCI-MSI-X virtio1-config
>> 209: 188747 0 PCI-MSI-X virtio1-input
>> 217: 1 0 PCI-MSI-X virtio1-output
>> 225: 0 0 PCI-MSI-X virtio2-config
>> 233: 2204149 0 PCI-MSI-X virtio2-input
>> NMI: 1455767 1426226
>> LOC: 1896099 1896637
>> ERR: 0
>> MIS: 0
>>
>> the application on all vcpu is the same. so i think the new pv driver
>> caused ept violation .
>>
>>
>> 2010/11/10 Avi Kivity <[email protected]>:
>>> On 11/10/2010 09:09 AM, lidong chen wrote:
>>>>
>>>> after slove the ept violation problem, i found the vm exits times is
>>>> still more than xen.
>>>>
>>>> and i found most of them is caused by io instruction. then i stat the
>>>> port number, most of them is caused by virio_net.
>>>
>>> This is also solved by the msi-capable virtio driver.
>>>
>>> --
>>> error compiling committee.c: too many arguments to function
>>>
>>>
>>
>
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