Intel MFS5520VI ユーザーズマニュアル

Functional Architecture

Intel® Compute Module MFS5520VI TPS

Revision

1.3

Intel order number: E64311-005

The Intel

82575EB device provides two standard IEEE 802.3 Ethernet interface through its

SERDES interfaces. Each network interface controller (NIC) drives two LEDs located on the
front panel. The LED indicates transmit / receive activity when blinking.

3.7.1

Direct Cache Access (DCA)

Direct Cache Access (DCA) is a component of Intel

I/O Acceleration Technology 2 (Intel

I/OAT2). The DCA mechanism is a system-level protocol in a multi-processor system to improve
I/O network performance thereby providing higher system performance. The basic idea is to
minimize cache misses when a demand read is executed. This is accomplished by placing the
data from the I/O devices directly into the CPU cache through hints to the processor to perform
a data pre-fetch and install it in its local caches. The Intel

Xeon

Processor 5500 series and

Intel

Xeon

Processor 5600 series processors support Direct Cache Access (DCA). DCA can

be enabled or disabled in the BIOS processor setup menu.

3.8 Intel

Virtualization Technology for Directed I/O (Intel

VT-d)

The Intel

Virtualization Technology is designed to support multiple software environments

sharing same hardware resources. Each software environment may consist of an OS and
applications. The Intel

Virtualization Technology can be enabled or disabled in the BIOS setup.

The default behavior is disabled.

Note: If the setup options are changed to enable or disable the Virtualization Technology setting
in the processor, the user must perform an AC power cycle for the changes to take effect.

The Intel

5520 Chipset IOH supports DMA remapping from inbound PCI Express* memory

Guest Physical Address (GPA) to Host Physical Address (HPA). PCI devices are directly
assigned to a virtual machine leading to a robust and efficient virtualization.