[Xen-users] Xen 3.1 Performance

[Michael Watters <michael@xxxxxxxxxx>]

Has anybody else noticed that dom0 runs a lot worse under Xen 3.1?  With 
3.0.4 my load average on dom0 was 0, now it's 10 with all of my domUs 
running.  It seems like the qemu-dm processes is what's causing the load.
Here's my current system load.

xentop - 21:03:18   Xen 3.1.0
9 domains: 1 running, 8 blocked, 0 paused, 0 crashed, 0 dying, 0 shutdown
Mem: 4192892k total, 4084184k used, 108708k free    CPUs: 4 @ 1995MHz
     NAME  STATE   CPU(sec) CPU(%)     MEM(k) MEM(%)  MAXMEM(k) 
MAXMEM(%) VCPUS NETS NETTX(k) NETRX(k) VBDS   VBD_OO   VBD_RD   VBD_WR SSID
 Domain-0 -----r        485   23.1     504288   12.0   no limit       
n/a     4    4     1932     1803    0        0        0        0    0

top - 21:03:55 up 54 min,  6 users,  load average: 7.31, 8.10, 6.02
Tasks: 150 total,   2 running, 148 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.3% us,  2.0% sy,  0.0% ni, 73.4% id, 24.2% wa,  0.0% hi,  0.0% si
Mem:    504484k total,   500448k used,     4036k free,     6040k buffers
Swap:  4192956k total,      720k used,  4192236k free,   333640k cached

 PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  
COMMAND                                                                                                

17582 root      15   0 86476  12m 5868 S    6  2.5   0:29.06 
/usr/lib/xen/bin/qemu-dm -d 9 -vcpus 1 -boot c -acpi -usb -usbdevice 
tablet -domain-name plesktest.watte
14033 root      15   0 98664 3316 1280 S    4  0.7   0:31.11 
/usr/lib/xen/bin/qemu-dm -d 3 -vcpus 1 -boot c -acpi -usb -usbdevice 
tablet -domain-name host4.thegbox.c
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