Asu - IBM NeXtScale System Planning And Implementation Manual

Memory Speed (Default: Max Performance)
This option sets the following operating frequency of the installed DIMMs:
– Minimal Power provides less performance for better power savings. The
memory operates at the lowest supported frequency.
– Power Efficiency provides the best performance per watt ratio. The
memory operates one step under the rated frequency.
– Max Performance provides the best system performance. The memory
operates at the rated frequency.
Memory Power Management (Default: Disabled)
This option sets the memory power management. Disable provides maximum
performance at the expense of power.
Socket Interleave (Default: NUMA)
This option sets NUMA or Non-NUMA system behavior. When NUMA is
selected, memory is not interleaved across processors whereas Non-NUMA
memory is interleaved accross processors.
Memory Data Scrambling (Default: Enabled)
This option enables a memory data scrambling feature to further minimize
bit-data errors.
Page Policy (Default: Adaptive)
This option determines the following Page Manager Policy in evaluating
memory access:
– Closed: Memory pages are closed immediately after each transaction.
– Open: Memory pages are left open for a finite time after each transaction
for possible recurring access.
– Adaptive: Use Adaptive Page Policy to decide the memory page state.

7.1.3 ASU

By using the IBM ASU tool, users can modify firmware settings from the
command line on multiple operating-system platforms.
You can perform the following tasks by using the utility:
Modify selected basic input/output system (BIOS) CMOS settings without
restarting the system to access F1 settings.
Modify selected baseboard management controller setup settings.
Modify selected Remote Supervisor Adapter and Remote Supervisor Adapter
II setup settings.
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IBM NeXtScale System Planning and Implementation Guide