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Special Forums Hardware Hyperthreaded virtual cores, different C-States? Post 302922532 by Peasant on Sunday 26th of October 2014 03:33:27 AM
Old 10-26-2014
In my case 'the fix' was to put whole-core constraint on most utilized ldoms (databases) and keep the VCPUs count inside core boundary.

For instance, t5-2 sparc has 256 available VCPU (threads), which translates into 32 cores or 2 sockets 16 core each. For best performance one should give VCPU resources multiples of 8.
Be sure to reboot the hypervisor after such major changes.

Regarding HPVM (now vpars and Integrity VM) i would recommend using VPAR since they are configured only is such manner(dedicated cores for virtual machines and hypervisor).

Integrity VM can suffer from such 'misconfiguration' as well since it (can) share cores.

Nice blog about it, a bit old but good.
https://blogs.oracle.com/jsavit/entr...ore_allocation
 

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ppu(5)								File Formats Manual							    ppu(5)

NAME
ppu - Pay per use software for HP-UX DESCRIPTION
Pay per use (PPU) is a program under which customers pay only for computing capacity that they use. The PPU software provides services for metering resource utilization on supported HP systems. Depending on the type of contract a PPU system is under, utilization can be either of the actual percentage utilization of each core, or a count of the number of active cores in the system. The PPU software communicates with a utility meter to report utilization data. The utility meter in turn transmits the utilization data to HP for proper billing. PPU systems must be configured to use a utility meter. Utility meter configuration is accomplished using the command (see ppuconfig(1M)). The data that is sent to HP is aggregated and sent to billing; it is also posted on the Utility Pricing Solutions portal for viewing at http://www.hp.com/go/payperuse. PPU can be run in an HP Integrity Virtual Machines environment (HPVM). In this case, the usage information for billing purposes is still the overall usage for the VM Host. However, you can examine the usage report at the portal to see a detailed breakdown of the usage for each virtual machine (also called a "guest"). In an HPVM environment, PPU needs to be installed and configured only on the VM Host, not on the guests. The command will report an error if invoked on a VM guest. For more information see the Pay per use User's Guide located at /usr/share/doc/PayPerUseUserGuide.pdf. SEE ALSO
ppud(1M), ppuconfig(1M) ppu(5)
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