Installation guide

Appendix 1: BIOS and OS settings

The following were the settings of the indicated BIOS parameters used during these tests.

The BIOS version was P66 07/27/2010.

 System Options -> Processor Options -> Intel Hyperthreading Options -> Enabled

 System Options -> Processor Options -> Processor Core Disable -> All Cores Enabled

 System Options -> Processor Options -> Intel Turbo Boost Technology -> Enabled

 System Options -> Processor Options -> Intel VT-d -> Enabled

 Power Management Options -> HP Power Profile -> Maximum Performance

 Power Management Options -> HP Power Regulator -> HP Static High Performance Mode

 Power Management Options -> Redundant Power Supply Mode -> High Efficiency Mode (Auto)

 Power Management Options -> Advanced Power Management Options -> Minimum Processor Idle power Core

State -> No C-states

 Power Management Options -> Advanced Power Management Options -> Minimum Processor Idle Power Package

State -> No Package State

 Power Management Options -> Advanced Power Management Options -> Dynamic Power Savings Mode

Response -> Fast

 Advanced Options -> Advanced System ROM Options -> Address Mode 44-bit -> Disabled (if system RAM is 1TB

or less)

 Advanced Options -> Advanced System ROM Options -> x2APIC Options -> DISABLED (with RHEL5.6)

 Advanced Options -> Advanced Performance Tuning Options -> HW Prefetcher, Adjacent Sector Prefetcher and

DCU Prefetcher -> all 3 options are ENABLED

The following kernel parameters were set in sysctl.conf

 kernel.shmall = 183552000 # default is 2097152

 kernel.shmmax = 751828992000 # default = 4294967295

 kernel.panic_on_io_nmi = 1

 kernel.sem = 250 32000 100 128

 kernel.shmmni = 4096

 net.core.rmem_default = 262144

 net.core.wmem_default = 262144

 net.core.rmem_max = 4194304

 net.core.wmem_max = 1048576

 net.ipv4.ip_local_port_range = 9000 65500

 fs.aio-nr = 2000000

 fs.file-max = 6815744

 fs.aio-max-nr = 1048576

 vm.nr_hugepages = 358500

 vm.hugetlb_shm_group = 777