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Dell PowerEdge C6320p Owner's Manual

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Memory Settings details

About this task

The Memory Settings screen details are explained as follows:
Option
Description
System Memory Model
Displays options to select the memory models which determine how the tiles align with memory on the package. The default setting is Quadrant.

When set to All2All, memory traffic is uniformly hashed across all distributed directories. All the cores will be serviced by all CHA's (Caching Home Agent).

When set to SNC-2 (Sub-NUMA Cluster), the processor tile array is divided into equal halves each configured as a separate Non-Uniform Memory Architecture (NUMA) domain to the O/S.

When set to SNC-4 (Sub-NUMA Cluster), the processor tile array is divided into four quadrants each configured as a separate NUMA domain to the O/S.

When set to Hemisphere all the CHAs, EDCs, MCs are equally split and assigned to two clusters (system address space is interleaved instead of split).

When set to Quadrant all the CHAs, EDCs, MCs are equally split and assigned to four clusters (system address space is interleaved instead of split).

NOTE: Quadrant and Hemisphere mode are transparent to operating system software (OS) and therefore do not require a NUMA aware OS to take advantage of any performance gains.  OS software does not see separate NUMA nodes for each half or quadrant.
NOTE: The System Memory Model switches to All2All mode automatically when single DIMM is installed.
NOTE: SNC-2 (Sub-NUMA Cluster) and Hemisphere modes are not supported on Intel Xeon Phi 72XX and Phi 72XXF processors.
Processor Embedded Memory Mode
Displays options to select the processor memory mode which determines how the embedded memory is allocated to either cache, system memory, or both. The default setting is Cache.

When set to Memory, all the embedded memory is allocated to system memory.

When set to Cache, all the embedded memory is allocated to cache.

When set to Hybrid, half of the embedded memory is allocated to cache and half to system memory.

NOTE: DIMM sockets 01 to 08 are not available when Processor Embedded Memory Mode is set to Cache mode.
NOTE: Memory size of DIMMs installed on sockets 01 to 08 is reduced when Processor Embedded Memory Mode mode is changed from Memory to Hybrid.
NOTE: Cache and Hybrid modes are not supported on All2All mode of System Memory Model on Intel Xeon Phi 72XX and Phi 72XXF processors.
Memory Throttling Mode
Displays processor embedded memory thermal management/throttling modes. The default setting is CLTT. 

When set to CLTT, the processor periodically polls the thermal sensor data of the DIMMs for optimal power management.

When set to OLTT, thermal throttling happens at a preconfigured temperature levels. OLTT should be used on error cases of CLTT where DIMM temperature reading sensors are not available.

System Memory Testing
Specifies whether the system memory tests are run during system boot. Options are Enabled and Disabled. This option is set to Disabled by default.
Memory Operating Mode
Specifies the memory operating mode. The available option is Optimizer Mode.
Processor Embedded Memory Total Size
Displays the total size of the processor embedded memory.
Processor Embedded Memory Allocated for Cache
Displays size of the processor embedded memory allocated to cache.
Processor Embedded Memory Allocated for System
Displays size of the processor embedded memory allocated to system memory.
Installed Memory Size
Displays the amount of DDR4 memory installed in the system.
System Memory Size
Specifies the memory size in the system.
System Memory Type
Specifies the type of memory installed in the system.
System Memory Speed
Specifies the memory speed.
System Memory Voltage
Specifies the memory voltage.
Video Memory
Specifies the amount of video memory.

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