Brocade Communications Systems BR-1020 Guía para resolver problemas descargar pdf (Pagina 99)

Brocade Adapters Troubleshooting Guide 81

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Tuning network drivers

VMware tuning

All VMware tunable parameters for the network driver are optimized for best performance using

default values. For details on configuring these parameters, refer to the “Adapter Configuration”

chapter in the Brocade Adapters Installation and Reference Manual.

Specific recommendations for jumbo packet size and NetQueue follow.

Parameters are listed in the following table.

Jumbo packet size

Recommendations to enhance performance

Increase throughput by setting MTU to 9000 bytes.

How to change values

Refer to instructions for Windows “Network driver parameters” in Appendix A of Brocade Adapters

Installation and Reference Manual.

References for more tuning information

Refer to the 10Gbps Networking Performance on ESX 3.5 Update 1 available through

www.vmware.com.

NetQueue

NetQueue improves receive-side networking performance on servers in 10 Gigabit Ethernet

virtualized environments. NetQueue provides multiple receive queues on the CNA, which allows

processing on multiple CPUs to improve network performance.

MSI-X is an eXtended version of Message Signaled Interrupts defined in the PCI 3.0 specification..

All Brocade adapters support MSI-X, which helps improve overall system performance by

contributing to lower interrupt latency and improved host CPU utilization. MSI-X is enabled by

default in VMware ESX Server 3.5, and must remain enabled for NetQueue to function. Please

make sure that bnad_msix=0 is not listed in VMware module parameters because that would

disable NetQueue.

Parameter Default

Jumbo Packet Size 1500

VLAN ID Disabled

MSI-X

(Message Signaled

Interrupts Extended)

Enable (1)

Interrupt Moderation

(Set for receive

interrupts)

NetQueue Disable

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