Questions regarding CPU cores vs rctl limit Post: 303034890

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Operating Systems Solaris Questions regarding CPU cores vs rctl limit Post 303034890 by Peasant on Thursday 9th of May 2019 01:25:48 AM

05-09-2019

Moderator

No. You will need to create a pset with wanted cpu cores and alocate that to specific zone or zones to compliant as far as i recall.

Lets say for simplicity you have 10 zones, 1 global zone and 9 zones
9 zones have 1 vcpu share (including global), while 1 zone has 2 vcpu share.

This means that in only in the case of cpu pressure, say 100%, kernel will guarantee each zone 10% of resources (1 cpu share) and one zone (2 cpu shares) will get 20% of cpu resources.
Not cores per se, but compute power using FSS scheduler.

For instance, all zones are mostly idle using total of 10% cpu, any zone will able to use rest of cpu time, as long there is no competition for cpu time.
Only under cpu pressure the scheduler will kick in to alocate time per ratio (1:1:1:1:1:1:1:1:1:2 = 100) to ensure quality of service per shares configuration.

When using psets allocated to zones, a zone will have dedicated cores defined in pset and no other zone will able to use those cores.
And you will be compliant as oracle hard partition, if that didn't change in the meantime...

Hope that helps.
Regards
Peasant.

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papi_hw_info_t

PAPI_hw_info_t(3)						       PAPI							 PAPI_hw_info_t(3)

NAME

       PAPI_hw_info_t -

       Hardware info structure.

SYNOPSIS

   Data Fields
       int ncpu
       int threads
       int cores
       int sockets
       int nnodes
       int totalcpus
       int vendor
       char vendor_string [128]
       int model
       char model_string [128]
       float revision
       int cpuid_family
       int cpuid_model
       int cpuid_stepping
       int cpu_max_mhz
       int cpu_min_mhz
       PAPI_mh_info_t mem_hierarchy
       int virtualized
       char virtual_vendor_string [128]
       char virtual_vendor_version [128]
       float mhz
       int clock_mhz
       int reserved [8]

Field Documentation
   int PAPI_hw_info_t::clock_mhz
       Deprecated

   int PAPI_hw_info_t::cores
       Number of cores per socket

   int PAPI_hw_info_t::cpu_max_mhz
       Maximum supported CPU speed

   int PAPI_hw_info_t::cpu_min_mhz
       Minimum supported CPU speed

   int PAPI_hw_info_t::cpuid_family
       cpuid family

   int PAPI_hw_info_t::cpuid_model
       cpuid model

   int PAPI_hw_info_t::cpuid_stepping
       cpuid stepping

   PAPI_mh_info_t PAPI_hw_info_t::mem_hierarchy
       PAPI memory heirarchy description

   float PAPI_hw_info_t::mhz
       Deprecated

   int PAPI_hw_info_t::model
       Model number of CPU

   char PAPI_hw_info_t::model_string[128]
       Model string of CPU

   int PAPI_hw_info_t::ncpu
       Number of CPUs per NUMA Node

   int PAPI_hw_info_t::nnodes
       Total Number of NUMA Nodes

   float PAPI_hw_info_t::revision
       Revision of CPU

   int PAPI_hw_info_t::sockets
       Number of sockets

   int PAPI_hw_info_t::threads
       Number of hdw threads per core

   int PAPI_hw_info_t::totalcpus
       Total number of CPUs in the entire system

   int PAPI_hw_info_t::vendor
       Vendor number of CPU

   char PAPI_hw_info_t::vendor_string[128]
       Vendor string of CPU

   char PAPI_hw_info_t::virtual_vendor_string[128]
       Vendor for virtual machine

   char PAPI_hw_info_t::virtual_vendor_version[128]
       Version of virtual machine

   int PAPI_hw_info_t::virtualized
       Running in virtual machine

Author
       Generated automatically by Doxygen for PAPI from the source code.

Version 5.2.0.0 						  Tue Jun 17 2014						 PAPI_hw_info_t(3)