Lower Than Expected Performance on Dual Port 10GbE Devices
Some PCI Express x8 slots are actually configured as x4 slots. These slots have insufficient bandwidth for full 10Gbe
line rate with dual port 10GbE devices. The driver can detect this situation and will write the following message in the
system log: "PCI Express bandwidth available for this card is not sufficient for optimal performance. For optimal per-
formance a x8 PCI Express slot is required." If this error occurs, moving your adapter to a true x8 slot will resolve the
issue.
Failed connection and possible system instability
If you have non-Intel networking devices capable of Receive Side Scaling installed in your system, the Microsoft Win-
dows registry keyword “RSSBaseCPU” may have been changed from the default value of 0x0 to point to a logical pro-
cessor. If this keyword has been changed, then devices based on Intel(R) 82598 or 82599 10 Gigabit Ethernet
Controllers might not pass traffic. Attempting to make driver changes in this state may cause system instability. Set the
value of RSSBaseCpu to 0x0, or to a value corresponding to a physical processor, and reboot the system to resolve the
issue.
Windows* Event Log Messages
Intel® Network Adapter Messages
Below is a list of Intel network adapter custom event messages that appear in the Windows* Event Log for the following
adapters:
l
Intel® PRO/1000 PT Server Adapter
l
Intel® PRO/1000 PT Dual Port Server Adapter
l
Intel® PRO/1000 PF Server Adapter
Event
ID
Message
Severity
4
E1express:
PROBLEM: Could not find a PRO/1000 adapter.
ACTION: Reinstall driver.
NOTE:
An additional action that may be taken is to reseat the adapter to ensure it is
firmly seated in the PCI slot.
Error
5
E1express:
PROBLEM: Driver could not determine which PRO/1000 adapter to load on.
ACTION: Reinstall driver.
Error
6
E1express:
PROBLEM: Could not allocate the MAP REGISTERS necessary for operation.
ACTION: Select the adapter in the network control panel. Click properties. Reduce the num-
ber of transmit descriptors and restart.
Error
7
E1express:
PROBLEM: Could not assign an interrupt for the PRO/1000.
ACTION: Try another PCI slot.
Error
8
E1express:
PROBLEM: Could not allocate memory necessary for operation.
ACTION: Reduce the number of receive descriptors, and coalesce buffer, then restart.
Error
9
E1express:
PROBLEM: Could not allocate shared memory necessary for operation.
ACTION: Reduce the number of receive descriptors, and coalesce buffers, then restart.
Error
10
E1express:
PROBLEM: Could not allocate memory for receive structures.
ACTION: Reduce the number of receive descriptors and restart.
Error
Содержание Ethernet 10G 2P X520 Adapter
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