[Xen-users] How to use VCPUs

[Carsten Schiers <carsten@xxxxxxxxxx>]

Dear all,

currently, I run Xen on a AMD Dualcore CPU. I have

  Dom0 (clearly)
  DomU Firewall (Endian)
  DomU Fileserving (Samba)
  DomU Mail&Fax (Scalix, Hylafax)
  DomU Videostraming (Vdr) 
  DomU DMZ (web frontend, file sharing)
  DomU 64 Bit development
  DomU 32 Bit development

Dom0 uses clearly 2 VPCU, pinned (because of cpufreq mgmt).

I assigend only 2 VPCUs to the development machines.

Does this make sense?

Or does it make more sense to assign 2 VCPUs to all response critical DomUs, 
too.

Or does it make more sense to assign 1 VCPU only to all DomUs, because we are 
not
sure that a VPCU is a physical CPU and it could be that the 2 VCPUs of a DomU 
uses
the same physical core, which wouldn't make much sense.

Or does it make more sense to dedicate (as it is pinned anyhow) one VPCU (and 
thus
physical CPU) to all machines that don't need much response time and save one 
VCPU
for e.g. the Videostreaming DomU.

I am bit lost, not a lot of docs found so far...

Thanks and have a nice weekend,
Carsten.

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