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TaiShan Server BIOS Parameter Reference (Kunpeng 920 Processor) 23

Memory Config

Memory Config

This section describes system parameters and function control on the Memory Config screen.

Figure 5-6 shows the Memory Config screen. Table 5-3 describes the parameters.

When the BBU is in position, modifying parameters on the Memory Config screen will cause data loss in the battery-protected memory.

Figure 5-6 Memory Config screen

Table 5-3 Parameters on the Memory Config screen

Parameter

Description

Default Value

Memory Print Level

Sets the memory print level. The options are as follows:

  • Disabled: disables the print function.
  • MiniMum: prints the most important memory initialization information.
  • MinMax: prints common and part of important memory initialization information.
  • MaxiMum: displays all memory initialization information. (This option is not recommended. It causes the system to print information for a long time, affecting the system startup.)

MiniMum

Memory Frequency

Sets the memory speed. The options are as follows:

  • Auto
  • 1600
  • 1866
  • 2133
  • 2400
  • 2666
  • 2933
  • 3200

Auto

Custom Refresh

Enables or disables the function for customizing the memory refresh rate. The options are as follows:

  • Enable
  • Disable

Enable

Custom Refresh Rate

Sets the memory refresh rate. The options are as follows:

  • 32ms
  • 64ms
  • Auto

32ms

Memory Isolation

Enables or disables memory isolation. The options are as follows:

  • Enabled
  • Disabled

Enabled

SPD CRC Optimization

Enables or disables SPD CRC optimization. The options are as follows:

  • Enabled
  • Disabled

Enabled

Rank Margin Tool

The rank margin tool (RMT) determines whether to conduct a margin test (on the memory timings and voltage signals). The options are as follows:

  • Enable
  • Disable

Disable

RMT Pattern Length

RMT pattern length is configurable when a margin test (on the memory timings and voltage signals) is enabled. The value ranges from 1 to 32767.

NOTE:

This parameter is displayed when Rank Margin Tool is set to Enabled.

1

Per Byte Margining

The parameter is configurable when the Margin test (which tests the memory timings and voltage signals) is enabled, and it determines the margin test granularity (per byte). The options are as follows:

  • Enabled
  • Disabled
    NOTE:

    This parameter is displayed when Rank Margin Tool is set to Enabled.

Disabled

Per Bit Margining

The parameter is configurable when the Margin test (which tests the memory timings and voltage signals) is enabled, and it determines the margin test granularity (per rank or per bit). The options are as follows:

  • Enable
  • Disable
NOTE:

This parameter is displayed when Rank Margin Tool is set to Enable.

Disable

CA Margin

Indicates whether a command line/address line margin test is performed. The options are as follows:

  • Enable
  • Disable
NOTE:

This parameter is displayed when Rank Margin Tool is set to Enable.

Disable

Die Interleaving

Determines whether to enable DIE interleaving. When the DIE interleaving is enabled, the DDR bandwidth can be fully used and the bandwidth of each DDR channel can be balanced to improve the DDR usage efficiency. The options are as follows:

  • Enable
  • Disable

Disable

Channel Interleaving

Determines whether memory channels can be interconnected with each other.

Enable

Channel Interleaving 3Way

Determines whether three memory channels can be interconnected with each other. The options are as follows:

  • Enable
  • Disable

Enable

Rank Interleaving

Sets the rank interleaving mode. The options are as follows:

  • 1-way Interleave
  • 2-way Interleave
  • 4-way Interleave

4-way Interleave

NUMA

Determines whether the non-uniform memory access (NUMA) can be enabled. The options are as follows:

  • Enable
  • Disable

Enable

Skt Interleaving

Enables or disables the cross-CPU interleaving function. After this function is enabled, memory resources can be evenly allocated among CPUs to resolve bandwidth and latency issues. The options are as follows:

  • Disable
  • Enable
NOTE:
  • This parameter is displayed only when NUMA is set to Disable.
  • Only the BIOSs on the following servers support this parameter:
    • BIOS V158 and later on TaiShan 200 servers (models 2280 and 5280)
    • BIOS V169 and later on TaiShan 200 servers (model 2280E)
    • BIOS V168 and later on TaiShan 200 servers (model 1280)
    • BIOS V316 and later on TaiShan 200 server (models 2280 VE, 5280 VE, and 5290)
    • All BIOS versions on TaiShan 200 Pro servers (models 1280 and 2280)

Disable

One Numa Per Socket

Enables or disables one NUMA for each CPU. The options are as follows:

  • Enabled
  • Disabled
NOTE:
  • This parameter is invisible when NUMA is set to Disabled.
  • If Die Interleaving is enabled, the memory modules of the CPUs are symmetrically configured, and the CPUs are automatically integrated into one NUMA architecture. If you need to set multiple NUMA architectures for each CPU, disable One Numa Per Socket and Die Interleaving.
  • This parameter is not supported by the following servers:
    • TaiShan 200 servers (models 2280, 2180, 5180, 5280, 2280 VF, and 5280 VF) configured with Kunpeng 920 5220 or 3210 processors
    • TaiShan 200 Pro server (model 2280) configured with Kunpeng 920 5225 processors

Disabled

CKE Power Down

Enables or disables the CKE power signal shutdown function. The options are as follows:

  • Enable
  • Disable

Disable

CKE Idle Timer

Sets the CKE idle timer. The unit is DCLK, and the value ranges from 1 to 4095.

NOTE:

This parameter is available only when CKE Power Down is set to Enable.

20

Memory Test

Enables or disables the memory test during fast boot. The options are as follows:

  • Enable
  • Disable

Enable

Warm Boot Fast Support

Enables or disables the fast boot of warm reset. The options are as follows:

  • Enabled
  • Disabled

Enabled

Cold Boot Fast Support

Enables or disables the fast boot of cold reset. The options are as follows:

  • Enabled
  • Disabled

Enabled

Memory Init Type

Sets the memory initialization type. The options are as follows:

  • Parallel
  • Serial
NOTE:

TaiShan 200 servers (models XA320 and XA320C) do not support this parameter.

Parallel

Halt On Memory Error

Indicates whether to disable memory initialization when an error occurs. The options are as follows:

  • Disabled
  • Enabled
    NOTE:
    • This parameter is supported only by BIOS V182 and later on TaiShan 200 servers (models 1280, 2180, 2280, 5280, 5180, and 2280E).
    • This parameter is supported by all BIOS versions on TaiShan 200 Pro servers (model 1280).

Disabled

Exmbist Supports

Indicates whether to perform a memory Exmbist test during cold boot. The options are as follows:

  • Enabled
  • Disable
    NOTE:

    The following messages are added to the menu:

    • After the menu is enabled, the boot time increases by 4 to 9 minutes.
    • When this menu is enabled or disabled, no Exmbist test is performed for the 128 GB memory.

Disable

Multi-Bank Error Threshold

Exmbist multi-bank error threshold configuration. The value ranges from 0 to 65535.

NOTE:

Multi-Bank Error Threshold is displayed only after Exmbist Supports is enabled. The default value is 65535.

65535

Memory Topology

Displays memory topology information.

N/A

Figure 5-7 shows the Memory Topology screen. Table 5-4 describes the parameters.

The Memory Topology screen may vary according to the server.

Figure 5-7 Memory Topology screen
Table 5-4 Parameters on the Memory Topology screen

Parameter

Description

Default Value

DIMMxyz

Displays the memory capacity, dominant frequency, and manufacturer.

  • x indicates the CPU.
  • y indicates the memory channel.
  • z indicates the DIMM slot number.
NOTE:

NO DIMM indicates that no DIMM is installed in the slot.

N/A
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Update Date：2024-02-20
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