Enabling or disabling I/O Non-posted Prefecting

Use the I/O Non-posted Prefecting option to enable or disable Non-posted Prefecting for I/O.

Disabling non-posted prefetching for I/O can significantly improve performance for a small set of configurations that require a balanced mix of read/write I/O traffic. For example, configurations that include InfiniBand or multiple x16 devices that utilize max bandwidth of the PCI-e bus.

NOTE:

Disabling this feature has a slight impact on 100% I/O read bandwidth.

Procedure
  1. From the System Utilities screen, select System Configuration > BIOS/Platform Configuration (RBSU) > Power and Performance Options > I/O Non-posted Prefecting.
  2. Select a setting.

    • Enable

    • Disable

  3. Save your setting.