Start-Up Parameters - IBM System x3850 X5 Implementation Manual

A server is only as good as its weakest link, so you can have a well-tuned server, but a poorly
configured SAN to which it connects. Generally, you need to look at an entire solution,
including the SAN and network infrastructure, to fully achieve the best performance from the
server.
Table 8-4 provides an overview of UEFI settings for the HX5 that address a number of
performance scenarios.
Table 8-4 Overview of settings
Setting MaxImum
performance
TurboMode Enabled
TurboBoost Traditional
Processor Enabled
Performance
states
C states Disabled
C1E state Disabled
Prefetcher Enabled
Hyper- Enabled
Threading
Execute Disabled
Disable
Virtualization Disabled
Extensions
QPI Link Speed Max Performance
IMM Thermal Performance
Mode
CKE Policy Disabled
DDR Speed Max Performance
Page Policy Closed
Mapper Policy Closed
Patrol Scrub Disabled
Demand Scrub Enabled

8.5.2 Start-up parameters

UEFI systems, especially when scaled, can take time to start up. The number of adapters
installed in each node, for example, has a direct influence on the time that it takes for UEFI to
initialize.
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IBM eX5 Implementation Guide
Virtualization Low latency
Enabled Disabled
Power Optimized Automatically
disabled
Enabled Disabled
Enabled Disabled
Enabled Disabled
Enabled Enabled
Enabled Disabled
Enabled Disabled
Enabled Disabled
Max Performance Max Performance
Performance Performance
Disabled Disabled
Max Performance Max Performance
Closed Closed
Closed Closed
Disabled Disabled
Enabled Disabled
Performance HPC
per watt
Disabled Disabled
Automatically Automatically
disabled disabled
Enabled Disabled
Enabled Enabled
Enabled Enabled
Enabled Enabled
Enabled Enabled
Enabled Disabled
Enabled Disabled
Power Efficiency Max
Performance
Normal Performance
Disabled Disabled
Max Performance Max
Performance
Closed Closed
Closed Closed
Disabled Disabled
Enabled Disabled