Intel Ethernet X520 10GbE Dual Port KX4 Mezz User Manual page 37

NOTES:
The recommendations below are guidelines and should be treated as such. Additional factors such as
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installed applications, bus type, network topology, and operating system also affect system performance.
These adjustments should be performed by a highly skilled network administrator. They are not guar-
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anteed to improve performance. Not all settings shown here may be available through your BIOS, oper-
ating system or network driver configuration. Linux users, see the README file in the Linux driver
package for Linux-specific performance enhancement details.
When using performance test software, refer to the documentation of the application for optimal results.
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1. Install the adapter in a PCI Express bus slot.
2. Use the proper fiber cabling for the adapter you have.
3. Enable Jumbo Packets, if your other network components can also be configured for it.
4. Increase the number of TCP and Socket resources from the default value. For Windows based systems, we
have not identified system parameters other than the TCP Window Size which significantly impact performance.
5. Increase the allocation size of Driver Resources (transmit/receive buffers). However, most TCP traffic patterns
work best with the transmit buffer set to its default value, and the receive buffer set to its minimum value.
For specific information on any advanced settings, see Advanced Settings for Windows* Drivers or Linux* Driver for the
Intel® Network Server Adapters.
Optimized for quick response and low latency
Minimize or disable Interrupt Moderation Rate.
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Disable Offload TCP Segmentation.
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Disable Jumbo Packets.
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Increase Transmit Descriptors.
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Increase Receive Descriptors.
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Increase RSS Queues.
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Optimized for throughput
Enable Jumbo Packets.
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Increase Transmit Descriptors.
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Increase Receive Descriptors.
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On systems that support NUMA, set the Preferred NUMA Node on each adapter to achieve better scaling across
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NUMA nodes.
Optimized for CPU utilization
Maximize Interrupt Moderation Rate.
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Keep the default setting for the number of Receive Descriptors; avoid setting large numbers of Receive
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Descriptors.
Decrease RSS Queues.
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In Hyper-V environments, decrease the Max number of RSS CPUs.
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