HP ProLiant BL280c Configuring the HP ProLiant Server BIOS for Low-Latency App - Page 6

Configuring BIOS - g6 server series

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Configuring BIOS System requirements The configuration options described in this document are based on recent versions of HP BIOS that enable customers to disable the generation of periodic System Management Interrupts used for power and CPU monitoring, with their attendant latency impact. A properly tuned low-latency operating system is also required to achieve deterministic performance. No single "recipe" can be documented. Customers needing a low-latency environment often perform exhaustive testing of the latency impact of various tuning parameters with their application and systems to determine the optimum settings for their environment. BIOS tuning recommendations for optimum performance HP servers are configured by default to provide the best balance between performance and power consumption. These default settings may not provide the lowest latency. The first step in tuning for low latency is to examine these additional settings that may assist in obtaining optimal low-latency performance. These settings are accessible through RBSU and with the conrep script, a configuration tool provided by HP. Consider the following options as part of any deployment in low-latency OS kernel environments: • Set the HP ProLiant Power Regulator Mode to Static High Mode. • Disable Processor C-State Support. Options depend on the HP ProLiant server model and generation. C-State Support options include the following: o C1E Support o AMD C1 Halt Support o Any other C-State modes, such as C3 or C6, that are enabled by the BIOS • On HP ProLiant G6 servers utilizing Intel® Xeon® processors, disable QPI Power Management. • Disable Intel® Turbo Boost on HP ProLiant G6 servers and server blades based on Intel® Xeon® processors. Starting with HP ProLiant G6 servers that utilize Intel® Xeon® processors, setting the HP Power Profile Option in RBSU to Maximum Performance Mode sets these recommended additional low-latency options for minimum BIOS latency. All HP ProLiant G6 and later servers, regardless of the ROM version, support setting Intel® Turbo Boost and C-States. HP ProLiant 100 Series and HP ProLiant SL servers do not support advanced features for iLO Performance Monitoring and Memory Pre-Failure notification. Configuring BIOS 6

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Configuring BIOS 6
Configuring BIOS
System requirements
The configuration options described in this document are based on recent versions of HP BIOS that enable
customers to disable the generation of periodic System Management Interrupts used for power and CPU
monitoring, with their attendant latency impact.
A properly tuned low-latency operating system is also required to achieve deterministic performance. No
single "recipe" can be documented. Customers needing a low-latency environment often perform
exhaustive testing of the latency impact of various tuning parameters with their application and systems to
determine the optimum settings for their environment.
BIOS tuning recommendations for optimum
performance
HP servers are configured by default to provide the best balance between performance and power
consumption. These default settings may not provide the lowest latency. The first step in tuning for low
latency is to examine these additional settings that may assist in obtaining optimal low-latency
performance. These settings are accessible through RBSU and with the
conrep
script, a configuration
tool provided by HP.
Consider the following options as part of any deployment in low-latency OS kernel environments:
•
Set the HP ProLiant Power Regulator Mode to Static High Mode.
•
Disable Processor C-State Support. Options depend on the HP ProLiant server model and generation.
C-State Support options include the following:
o
C1E Support
o
AMD C1 Halt Support
o
Any other C-State modes, such as C3 or C6, that are enabled by the BIOS
•
On HP ProLiant G6 servers utilizing Intel® Xeon® processors, disable QPI Power Management.
•
Disable Intel® Turbo Boost on HP ProLiant G6 servers and server blades based on Intel® Xeon®
processors.
Starting with HP ProLiant G6 servers that utilize Intel® Xeon® processors, setting the HP Power Profile
Option in RBSU to Maximum Performance Mode sets these recommended additional low-latency options
for minimum BIOS latency.
All HP ProLiant G6 and later servers, regardless of the ROM version, support setting Intel® Turbo Boost
and C-States. HP ProLiant 100 Series and HP ProLiant SL servers do not support advanced features for iLO
Performance Monitoring and Memory Pre-Failure notification.