only one CPU and bad write performance in Guest

S

Samuel Orsenne

New Member
Feb 19, 2012
1
0
1
Berlin, Germany, Germany
dear Forum,

I have a Intel-based (Core i7-2600) Server with Proxmox 2.0
Code: 
# $pveversion
pve-manager/2.0/30bb4d33
One running guest (Ubuntu Server 10.04.4 LTS) with Config as follows:
- CPU: 1 Socket, 4 Cores, qemu64
- 5 GB RAM
- VirtIO Disk
- VirtIO Network

Guest is doing fine, although I can't get more than one CPU to be detected in the Guest and very very poor write performance in the guest.
extracts from dmesg:
Code: 
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Linux version 2.6.32-38-server (buildd@allspice) (gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5) ) #83-Ubuntu SMP Wed Jan 4 11:26:59 UTC 2012 (Ubuntu 2.6.32-38.83-server 2.6.32.52+drm33.21)
[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-2.6.32-38-server root=UUID=3d3e67f1-94c9-4704-95be-7844c8206603 ro quiet
[    0.000000] KERNEL supported cpus:
[    0.000000]   Intel GenuineIntel
[    0.000000]   AMD AuthenticAMD
[    0.000000]   Centaur CentaurHauls
...
[    0.000000] Intel MultiProcessor Specification v1.4
[    0.000000] MPTABLE: OEM ID: BOCHSCPU
[    0.000000] MPTABLE: Product ID: 0.1
[    0.000000] MPTABLE: APIC at: 0xFEE00000
[    0.000000] Processor #0 (Bootup-CPU)
[    0.000000] I/O APIC #4 Version 17 at 0xFEC00000.
[    0.000000] Processors: 1
[    0.000000] SMP: Allowing 1 CPUs, 0 hotplug CPUs
...
[    0.020000] CPU: L1 I cache: 32K, L1 D cache: 32K
[    0.020000] CPU: L2 cache: 4096K
[    0.020000] CPU 0/0x0 -> Node 0
[    0.020000] CPU: Unsupported number of siblings 4
[    0.020000] mce: CPU supports 10 MCE banks
[    0.020000] Performance Events: unsupported p6 CPU model 2 no PMU driver, software events only.
[    0.020000] SMP alternatives: switching to UP code
[    0.024561] Freeing SMP alternatives: 41k freed
[    0.024578] ftrace: converting mcount calls to 0f 1f 44 00 00
[    0.024579] ftrace: allocating 22866 entries in 90 pages
[    0.040026] Setting APIC routing to flat
[    0.040829] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
[    0.040831] CPU0: Intel QEMU Virtual CPU version 1.0.50 stepping 03
[    0.160069] Brought up 1 CPUs
[    0.160071] Total of 1 processors activated (6823.63 BogoMIPS).
[    0.160273] CPU0 attaching NULL sched-domain.

cpu-info from guest:
Code: 
 cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 2
model name      : QEMU Virtual CPU version 1.0.50
stepping        : 3
cpu MHz         : 3411.816
cache size      : 4096 KB
physical id     : 0
siblings        : 1
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 4
wp              : yes
flags           : fpu de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pse36 clflush mmx fxsr sse sse2 ht syscall nx lm up rep_good pni cx16 popcnt hypervisor lahf_lm
bogomips        : 6823.63
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management:

poor write performance in guest:
Code: 
$ dd bs=1M count=128 if=/dev/zero of=test conv=fdatasync
128+0 records in
128+0 records out
134217728 bytes (134 MB) copied, 62.266 s, 2.2 MB/s

same test on host:
Code: 
$ dd bs=1M count=128 if=/dev/zero of=test conv=fdatasync
128+0 records in
128+0 records out
134217728 bytes (134 MB) copied, 0.862822 s, 156 MB/s

little Tech-Info from the PVE-Host:
Code: 
 $ pveversion -v
pve-manager: 2.0-28 (pve-manager/2.0/30bb4d33)
running kernel: 2.6.32-7-pve
proxmox-ve-2.6.32: 2.0-60
pve-kernel-2.6.32-7-pve: 2.6.32-60
lvm2: 2.02.88-2pve1
clvm: 2.02.88-2pve1
corosync-pve: 1.4.1-1
openais-pve: 1.1.4-1
libqb: 0.10.1-2
redhat-cluster-pve: 3.1.8-3
resource-agents-pve: 3.9.2-3
fence-agents-pve: 3.1.7-1
pve-cluster: 1.0-22
qemu-server: 2.0-17
pve-firmware: 1.0-15
libpve-common-perl: 1.0-14
libpve-access-control: 1.0-11
libpve-storage-perl: 2.0-11
vncterm: 1.0-2
vzctl: 3.0.30-2pve1
vzprocps: not correctly installed
vzquota: 3.0.12-3
pve-qemu-kvm: 1.0-3
ksm-control-daemon: not correctly installed

any help would be appreciated! :confused:
 
Samuel Orsenne said:
dear Forum,

I have a Intel-based (Core i7-2600) Server with Proxmox 2.0
Code: 
# $pveversion
pve-manager/2.0/30bb4d33
One running guest (Ubuntu Server 10.04.4 LTS) with Config as follows:
- CPU: 1 Socket, 4 Cores, qemu64
- 5 GB RAM
- VirtIO Disk
- VirtIO Network

Guest is doing fine, although I can't get more than one CPU to be detected in the Guest and very very poor write performance in the guest.
extracts from dmesg:
Code: 
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Linux version 2.6.32-38-server (buildd@allspice) (gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5) ) #83-Ubuntu SMP Wed Jan 4 11:26:59 UTC 2012 (Ubuntu 2.6.32-38.83-server 2.6.32.52+drm33.21)
[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-2.6.32-38-server root=UUID=3d3e67f1-94c9-4704-95be-7844c8206603 ro quiet
[    0.000000] KERNEL supported cpus:
[    0.000000]   Intel GenuineIntel
[    0.000000]   AMD AuthenticAMD
[    0.000000]   Centaur CentaurHauls
...
[    0.000000] Intel MultiProcessor Specification v1.4
[    0.000000] MPTABLE: OEM ID: BOCHSCPU
[    0.000000] MPTABLE: Product ID: 0.1
[    0.000000] MPTABLE: APIC at: 0xFEE00000
[    0.000000] Processor #0 (Bootup-CPU)
[    0.000000] I/O APIC #4 Version 17 at 0xFEC00000.
[    0.000000] Processors: 1
[    0.000000] SMP: Allowing 1 CPUs, 0 hotplug CPUs
...
[    0.020000] CPU: L1 I cache: 32K, L1 D cache: 32K
[    0.020000] CPU: L2 cache: 4096K
[    0.020000] CPU 0/0x0 -> Node 0
[    0.020000] CPU: Unsupported number of siblings 4
[    0.020000] mce: CPU supports 10 MCE banks
[    0.020000] Performance Events: unsupported p6 CPU model 2 no PMU driver, software events only.
[    0.020000] SMP alternatives: switching to UP code
[    0.024561] Freeing SMP alternatives: 41k freed
[    0.024578] ftrace: converting mcount calls to 0f 1f 44 00 00
[    0.024579] ftrace: allocating 22866 entries in 90 pages
[    0.040026] Setting APIC routing to flat
[    0.040829] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
[    0.040831] CPU0: Intel QEMU Virtual CPU version 1.0.50 stepping 03
[    0.160069] Brought up 1 CPUs
[    0.160071] Total of 1 processors activated (6823.63 BogoMIPS).
[    0.160273] CPU0 attaching NULL sched-domain.

cpu-info from guest:
Code: 
 cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 2
model name      : QEMU Virtual CPU version 1.0.50
stepping        : 3
cpu MHz         : 3411.816
cache size      : 4096 KB
physical id     : 0
siblings        : 1
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 4
wp              : yes
flags           : fpu de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pse36 clflush mmx fxsr sse sse2 ht syscall nx lm up rep_good pni cx16 popcnt hypervisor lahf_lm
bogomips        : 6823.63
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management:

poor write performance in guest:
Code: 
$ dd bs=1M count=128 if=/dev/zero of=test conv=fdatasync
128+0 records in
128+0 records out
134217728 bytes (134 MB) copied, 62.266 s, 2.2 MB/s

same test on host:
Code: 
$ dd bs=1M count=128 if=/dev/zero of=test conv=fdatasync
128+0 records in
128+0 records out
134217728 bytes (134 MB) copied, 0.862822 s, 156 MB/s

little Tech-Info from the PVE-Host:
Code: 
 $ pveversion -v
pve-manager: 2.0-28 (pve-manager/2.0/30bb4d33)
running kernel: 2.6.32-7-pve
proxmox-ve-2.6.32: 2.0-60
pve-kernel-2.6.32-7-pve: 2.6.32-60
lvm2: 2.02.88-2pve1
clvm: 2.02.88-2pve1
corosync-pve: 1.4.1-1
openais-pve: 1.1.4-1
libqb: 0.10.1-2
redhat-cluster-pve: 3.1.8-3
resource-agents-pve: 3.9.2-3
fence-agents-pve: 3.1.7-1
pve-cluster: 1.0-22
qemu-server: 2.0-17
pve-firmware: 1.0-15
libpve-common-perl: 1.0-14
libpve-access-control: 1.0-11
libpve-storage-perl: 2.0-11
vncterm: 1.0-2
vzctl: 3.0.30-2pve1
vzprocps: not correctly installed
vzquota: 3.0.12-3
pve-qemu-kvm: 1.0-3
ksm-control-daemon: not correctly installed

any help would be appreciated! :confused:
Click to expand...

I have a similar setup -- Core i7 930 and a Win7 KVM guest. In PVE 1.9 I could pass the 'args: -cpu host' into the VM conf file and it would allow essentially cpu passthrough and would DRAMATICALLY increase the guest performance. But since PVE 2.0 upgrade I am unable to get the guest to boot with anything but the qemu64 cpu type. Any time I try to use 'host' I get a BSOD.

Anyone know of any work arounds or is this a 'feature' of RC1? :)
 
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