Recovery And Ras - Lenovo ThinkSystem SD530 Manual

Table 11. Processors details (continued)
XPT Prefetcher
UPI Prefetcher
Cores in CPU Package
UPI Link Frequency
UPI Power Management
CPU Frequency Limits

Recovery and RAS

Use this menu to configure recovery policies and advanced reliability, availability, and serviceability settings.
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ThinkSystem Server with Intel Xeon SP (1st, 2nd Gen) UEFI Manual
XPT prefetch is a mechanism that enables a read request
• Enable
that is being sent to the last level cache to speculatively
• Disable
issue a copy of that read to the memory controller
prefetching.
Enable is the default setting.
UPI prefetch is a mechanism to get the memory read
• Enable
started early on DDR bus. The UPI receive path will
• Disable
spawn a memory read to the memory controller
prefetcher. Enable is the default setting.
Select the amount of cores enabled within each CPU
• All
Package.
• 1
All is the default setting.
• .
• .
n is the maximum number of cores that installed
processor support. For example, if the installed processor
• .
support 6 cores, it will show All, 1, 2, 3 4, and 5.
• n-1
Select the desired CPU UPI link frequency. [Maximum
• Minimal Power
Performance] mode maximizes performance. [Balanced]
• Balanced
mode offers a balance between performance and power.
[Minimal Power] maximizes power savings. When a preset
• Maximum
mode is selected, the low-level settings are not
Performance
changeable and will be grayed out. If user would like to
change the settings, please choose [Custom Mode] in
"Operating Mode" located under "System Setting"
submenu.
Maximum Performance is the default setting.
N/A Select the desired power management level for the CPU
UPI interface. L1 saves the most power but has longer
latency compared to L0p or Disabled. When a preset
mode is selected, the low-level settings are not
changeable and will be grayed out. If user would like to
change the settings, please choose [Custom Mode] in
"Operating Mode" located under "System Setting"
submenu.
N/A The maximum frequency (turbo, AVX, and non turbo) can
be restricted to a frequency that is between the maximum
turbo frequency for the CPU installed and 1.2GHz. This
can be useful for synchronizing CPU tasks. Note that the
max frequency for N+1 cores cannot be higher than N
cores. If an illegal frequency is entered, it will
automatically be limited to a legal value. If the CPU
frequency limits are being controlled through application
software, leave this menu item at the default ([Full turbo
uplift]),please choose [Custom Mode] in "Operating
Mode" and [Enable] in "Turbo Mode" located under
"System Setting" submenu.