HP UEFI System Utilities User Guide for HP ProLiant DL580 Gen8 Servers

Figure 96 Advanced Options Adjacent Sector Prefetch screen
Setting DCU Stream Prefetcher
You can control processor prefetching. In most cases, leave this option enabled. With certain
workloads, however, disabling this option can provide a performance benefit. Disable this option
only after performing application benchmarking to verify improved performance in a particular
environment.
To set DCU Stream Prefetcher:
1. From the System Utilities screen, select System ConfigurationBIOS/Platform Configuration
(RBSU)Advanced OptionsAdvanced Performance Tuning OptionsDCU Stream Prefetcher
and press Enter.
2. Select one of the following options:
Enabled (default)
Disabled
3. Press F10 to save your selection.
Accessing the BIOS/Platform Configuration (RBSU) menu 105