Tuning BIOS

Purpose

Configure advanced BIOS settings to improve server performance.

Procedure

1. Disable the system memory management unit (SMMU).
   

   Disable the SMMU feature only in non-virtualization scenarios. In virtualization scenarios, enable the SMMU.

   1. Restart the server and enter the BIOS.

      For details, see "Accessing the BIOS" in TaiShan Server BIOS Parameter Reference (Kunpeng 920 Processor).

   2. Choose Advanced > MISC Config and press Enter.
   3. Set Support Smmu to Disable.
2. Disable prefetch.
   1. On the BIOS, choose Advanced > MISC Config and press Enter.
   2. Set CPU Prefetching Configuration to Disabled, and press F10.