Functional Architecture
Intel® Compute Module MFS5520VI TPS
Revision
1.5
Intel order number: E64311-007
22
3.7
Network Interface Controller (NIC)
Network interface support is provided from the on-board Intel
®
82575EB NIC, which is a single,
compact component with two fully integrated GbE Media Access Control (MAC) and Physical
Layer (PHY) ports. The on-board Intel
®
82575EB NIC provides the Compute Module with
support for dual LAN ports designed for 1000 Mbps operation.
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.
