RFR(S): 8206408: Add missing CPU/system info to vm_version_ext on PPC64

[Volker Simonis]

Hi Gunter,

in general, your change looks good!

Is it guaranteed, that PowerArchitecturePPC64 and
VM_Version::_features_strings will be always initialized before they
are called from VM_Version_Ext::initialize_cpu_information ?

And finally, I'm wondering why you are using "CPU_TYPE_DESC_BUF_SIZE -
1" as the length argument in the first snprintf() call. Wouldn't
"CPU_TYPE_DESC_BUF_SIZE" be just fine like in the second call where
you are using "CPU_DETAILED_DESC_BUF_SIZE".

Thank you and best regards,
Volker


On Fri, Jul 6, 2018 at 2:51 PM, Haug, Gunter <gunter.haug at sap.com> wrote:
> Hi all,
>
> can I please have reviews and a sponsor for the following tiny fix:
>
> https://bugs.openjdk.java.net/projects/JDK/issues/JDK-8206408
> http://cr.openjdk.java.net/~ghaug/webrevs/8206408
>
> The solution is not really accurate as there is no obvious way to detect the number of cores/slots on a PPC64 system. Anyway, it would be better to have information on the virtualization of the system. We do have a solution for that at SAP and we would be happy to adopt it to JFR and contribute it if there is any interest.
>
> Thanks and best regards,
> Gunter
>