[PVE-User] explain cpu usage

rickytato rickytato rickytato at r2consulting.it
Fri Nov 14 11:14:22 CET 2014


Hi all,
I'm using pve 3.3 with kernel 3.10; six nodes in cluster without HA, only
for simple manage.
I've Dell Poweredge R415 with dual Opteron 4284 and 64GB of ram; anche VM
are in raid1 of SSD Samsung 850 PRO.

Now, the problem:
 11:10:06 up 10 days, 22:12,  1 user,  *load average: 11.33, 12.20, 12.50*

top -n1
top - 11:10:15 up 10 days, 22:12,  1 user,  load average: 11.54, 12.23,
12.51
Tasks: 390 total,   1 running, 389 sleeping,   0 stopped,   0 zombie
%Cpu(s): 52.1 us,  3.9 sy,  0.0 ni, 43.3 id,  0.1 wa,  0.0 hi,  0.7 si,
 0.0 st

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

21540 root      20   0 24.5g  23g 3836 S   *653* 36.8  25643:20 kvm
21409 root      20   0 24.5g  23g 3836 S   *573* 36.7  27016:59 kvm

atop: 600% user cpu anche 600% guest cpu..

Are normal this value? Two VM have 7core (1socke/7core) and cpu host.

When same software run on same hw not virtualized load avg still < 5, why?
No io wait with ssd :)


Tnx,
rr
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