Vmware Tuning; Tuning Network Drivers (Cnas Only) - Brocade Communications Systems CNA 1010 Troubleshooting Manual

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Message signaled interrupts (MSI-X)
All Brocade adapters support MSI-X, an eXtended version of the MSI defined in PCI 3.0
specification. MSI-X helps improve overall system performance by contributing to lower interrupt
latency and improved host CPU utilization.
MSI-X is supported in Windows Vista and Windows Server 2008.
To enable MSI-X, set the following registry key value to 0.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\bfad\Parameters\Device\msix_
disable
OS tunable parameters
Please see the section "Storage Stack Drivers" in Disk Subsystem Performance Analysis for
Windows Server 2003 optimizations located on the following website.
http://download.microsoft.com
Please see the sections "Performance Tuning for Storage Subsystem" and "I/O Priorities" in
Performance Tuning Guidelines for Windows Server 2008 located on the following website.
http://www.microsoft.com

VMware tuning

For performance tuning on VMware, refer to the following publications on the VMware website at
www.vmware.com:
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Tuning network drivers (CNAs only)

This section provides resources for tuning network drivers for CNAs on Linux, Windows, and
VMware systems. Note that the default values set for the driver parameters discussed in this
section should provide optimum performance. However, you may need to modify these values
depending on your network environment. Please follow your host and operating system guidelines
when doing so.
Brocade Adapters Troubleshooting Guide
53-1001582-01
Interrupt latency
Default:
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225 microseconds on the Brocade 415, 425, 815, and 825
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5 microseconds on the Brocade
Valid Range: 0 through 225 microseconds
Note that the value of 0 disables the latency monitor timeout interrupt.
Performance Tuning Best Practices for ESX Server 3. Refer to the following sections:
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Storage Performance Best Practices
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Related Publications
Fibre Channel SAN Configuration Guide. Refer to "Using ESX Server with SAN: Concepts."
Tuning network drivers (CNAs only)
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