Xen users - Jun 2011 - Xen very very slow on workstation HP Z4000

Hello,


To thank you for telling me if this message is not posted on the good list.

After installing Xen 4 on a workstation HP Z400, the hypervisor is 
extremely slow, both on a Fedora machine on a Debian Squeeze, whether in 
32-bit or 64-bit version.
Unable to install a DomU.

The problem seems to come from the hardware configuration of the HP Z400 
- Xeon - W3550-4 processors - 16 GB of memory. I have not found it 
necessary to modify the setup to solve this problem.

Must pass parameters specific to Grub2?

I want to clarify that the same installation on a machine Nec - Intel 
Core Duo E4500 - 3 GB of memory works perfectly.

I tried many solutions on the forums, I found nothing.

Below is some information about my setup.

Thank you help me find the solution.
Would this not a bug of Xen in view of my hardware.

Cordially
Pierre

root@debian:~# cat /proc/meminfo

MemTotal:         258708 kB
MemFree:           87556 kB
Buffers:            3308 kB
Cached:            47776 kB
SwapCached:            0 kB
Active:            36984 kB
Inactive:          34152 kB
Active(anon):      20160 kB
Inactive(anon):       60 kB
Active(file):      16824 kB
Inactive(file):    34092 kB
Unevictable:          16 kB
Mlocked:              16 kB
HighTotal:             0 kB
HighFree:              0 kB
LowTotal:         258708 kB
LowFree:           87556 kB
SwapTotal:      15624184 kB
SwapFree:       15624184 kB
Dirty:                 0 kB
Writeback:             0 kB
AnonPages:         20068 kB
Mapped:             8884 kB
Shmem:               168 kB
Slab:               8324 kB
SReclaimable:       3752 kB
SUnreclaim:         4572 kB
KernelStack:        1184 kB
PageTables:          624 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:    15753536 kB
Committed_AS:     165432 kB
VmallocTotal:     598008 kB
VmallocUsed:       62412 kB
VmallocChunk:     524316 kB
HardwareCorrupted:     0 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
DirectMap4k:      262144 kB
DirectMap2M:           0 kB

root@debian:~# cat /proc/cpuinfo

processor    : 0
vendor_id    : GenuineIntel
cpu family    : 6
model        : 26
model name    : Intel(R) Xeon(R) CPU           W3550  @ 3.07GHz
stepping    : 5
cpu MHz        : 3066.776
cache size    : 8192 KB
fdiv_bug    : no
hlt_bug        : no
f00f_bug    : no
coma_bug    : no
fpu        : yes
fpu_exception    : yes
cpuid level    : 11
wp        : yes
flags        : fpu de tsc msr pae mce cx8 apic mtrr mca cmov pat clflush 
acpi mmx fxsr sse sse2 ss ht nx constant_tsc up nonstop_tsc aperfmperf 
pni est ssse3 sse4_1 sse4_2 popcnt hypervisor ida
bogomips    : 6133.55
clflush size    : 64
cache_alignment    : 64
address sizes    : 36 bits physical, 48 bits virtual
power management:

root@debian:~# xm list
Name                                        ID   Mem VCPUs      State   
Time(s)
Domain-0                                     0   252     1     
r-----      4.9



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