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3 Replies Latest reply: Apr 8, 2013 3:14 AM by user6126629 RSS

Ora VM 3.2.2 + AMD Opteron 6100 series: hard partitioning

user6126629 Newbie
Currently Being Moderated
Hello,

I've Ora VM 3.2.2 server on Proliant DL385 G7 with 2 x Opteron 6100 processor.
Please confirm (or disprove) my speculation, that every core, displayed by
"xenpm get-cpu-topology" is really physical core.

Output from this is:

CPU core socket node
CPU0 0 0 0
CPU1 1 0 0
CPU2 2 0 0
CPU3 3 0 0
CPU4 4 0 0
CPU5 5 0 0
CPU6 6 0 1
CPU7 7 0 1
CPU8 8 0 1
CPU9 9 0 1
CPU10 10 0 1
CPU11 11 0 1
CPU12 0 1 2
CPU13 1 1 2
CPU14 2 1 2
CPU15 3 1 2
CPU16 4 1 2
CPU17 5 1 2
CPU18 6 1 3
CPU19 7 1 3
CPU20 8 1 3
CPU21 9 1 3
CPU22 10 1 3
CPU23 11 1 3

When I need virtual guest with 3 CPU, can I use only
3 CPU from this list? Isn't in AMD case avalilable any technology
like "INTEL hyperthreading" (from licensing viewpoint)?

Thank you in advice

Vladislav Rames
  • 1. Re: Ora VM 3.2.2 + AMD Opteron 6100 series: hard partitioning
    user11391721 Newbie
    Currently Being Moderated
    I have 2 HP Blade c7000 enclosures approx half full of HP Blades all AMD (g1s to g7s) as well as many other rack mounted servers. I don't run any hyper-thread cores in my environment.

    My understanding is that AMD cores are real cores and need to be licensed as such. If you use HT cores you may have to license them (I don't know). I personally multi-box multiple copies of the same game client on my HP Envy 17 3D which has in i7 with 4 real cores & 4 HT cores & I try to never run my clients on HTs (the MB software allows me to skip the HTs). I definitely see a difference in frame rates and performance if I forget to configure to not use HT cores... If I wouldn't do it to myself I wouldn't do it to my users either... That being said Oracle may count HT cores as real cores for licensing so I wouldn't pin them for that reason alone if they do.
  • 2. Re: Ora VM 3.2.2 + AMD Opteron 6100 series: hard partitioning
    user6126629 Newbie
    Currently Being Moderated
    Thanks for reply. In Intel HT technology is situation quite clear
    (how is described in http://www.oracle.com/technetwork/server-storage/vm/ovm-hardpart-168217.pdf),
    no need any licences for HT cores. But AMD technology is quite different: some parts of processors
    are common, some not (see http://de.wikipedia.org/wiki/AMD_Bulldozer),
    and, however, in licensy politics is impossible to find any logic :) . In licensy documentation which I found
    isn't noticed this AMD technology, so I have the same opinion like you (all cores must be licensed),
    but I'm not sure.
  • 3. Re: Ora VM 3.2.2 + AMD Opteron 6100 series: hard partitioning
    user6126629 Newbie
    Currently Being Moderated
    So, today I've got answer from official Oracle distribution support:

    Unfortunately, in my case (AMD 6100 series) every core, displayed
    in OS, is a real core for license purpose.

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