HP ProLiant DL380p HP Power Regulator for ProLiant servers - Page 7

Using Intel Turbo Boost Technology® with HP Power Regulator, Power consumption and system performance - proliant dl380 g7

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If you use the HP Power Profile pre-sets available through the RBSU in some G6 and G7 servers, you may indirectly set Power Regular to one of the modes that can degrade VMware ESX performance. When using HP Power Profile pre-sets, selecting the "Balanced Power and Performance" or the "Minimum Power Usage" setting will put Power Regulator in Dynamic Power Savings mode or Static Low Power mode, respectively. This influences VMware performance and workload balancing software. Choosing the HP Power Profile "Maximum Performance" setting activates the Power Regulator Static High Performance mode which does not affect VMware performance, but also disables other power savings features unrelated to P-state control. The HP Power Profile includes a "Custom" setting that doesn't disable these additional power savings features. We recommend that you change the Power Regulator option to Static High Performance independently, which automatically puts the HP Power Profile setting into the Custom mode. Using Intel Turbo Boost Technology® with HP Power Regulator Turbo Boost Technology is a feature of Intel Xeon processors. The technology allows a processor to enter a performance state higher than the specified maximum frequency of the processor (also called "dynamic overclocking"). The processor will enter higher states only if there is enough thermal and power headroom and only if enabled by the power management software. HP Dynamic Power Savings mode and HP Static High Power mode take full advantage of Turbo Boost Technology, beginning with Intel processor-based ProLiant G6 servers. You can enable Turbo mode through RBSU. Power consumption and system performance HP engineers have extensively tested performance on systems operating in different Power Regulator modes. For example, Figures 2 and 3 display the power and performance results for both an HP ProLiant DL380 G7 server and an HP ProLiant DL385 G7 under different levels of application load while in the Static Low Power, Static High Performance, and Dynamic Power Savings modes. 7

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If you use the HP Power Profile pre-sets available through the RBSU in some G6 and G7 servers, you
may indirectly set Power Regular to one of the modes that can degrade VMware ESX performance.
When using HP Power Profile pre-sets, selecting the “Balanced Power and Performance” or the
“Minimum Power Usage” setting will put Power Regulator in Dynamic Power Savings mode or Static
Low Power mode, respectively. This influences VMware performance and workload balancing
software.
Choosing the HP Power Profile “Maximum Performance” setting activates the Power Regulator Static
High Performance mode which does not affect VMware performance, but also disables other power
savings features unrelated to P-state control. The HP Power Profile includes a “Custom” setting that
doesn’t disable these additional power savings features. We recommend that you change the Power
Regulator option to Static High Performance independently, which automatically puts the HP Power
Profile setting into the Custom mode.
Using Intel Turbo Boost Technology® with HP Power
Regulator
Turbo Boost Technology is a feature of Intel Xeon processors. The technology allows a processor to
enter a performance state higher than the specified maximum frequency of the processor (also called
“dynamic overclocking”). The processor will enter higher states only if there is enough thermal and
power headroom and only if enabled by the power management software. HP Dynamic Power
Savings mode and HP Static High Power mode take full advantage of Turbo Boost Technology,
beginning with Intel processor-based ProLiant G6 servers. You can enable Turbo mode through RBSU.
Power consumption and system performance
HP engineers have extensively tested performance on systems operating in different Power Regulator
modes. For example, Figures 2 and 3 display the power and performance results for both an HP
ProLiant DL380 G7 server and an HP ProLiant DL385 G7 under different levels of application load
while in the Static Low Power, Static High Performance, and Dynamic Power Savings modes.