Oracle^® Dual Port 25 Gb Ethernet Adapter User's Guide

Analyze Slow Network Performance (Oracle Solaris x86)

The adapter supports several driver parameters that affect the performance of the ports. See Driver Parameters (Oracle Solaris x86) for more information about the default values.

1. View the network performance.

   # truss -p PID

2. Look for NIS, DNS, and network routing outages.

   If you find any issues, fix them before proceeding.

3. View the I/O statistics to ensure that there are no bottlenecks on the disk.

   # iostat -xcn 5

   If you discover a bottleneck, set the logging to dump to the /tmp directory. Then retest to ensure that the new configuration improved performance.

4. Use the vmstat and the mpstat commands to check that none of these conditions exist:

   • CPU is pegged.

   • CPU is receiving too many interrupts.

   • Memory is low.

   • Page faults are occurring.

   • Contention for resources causes too many spins on mutex (smtx).

   For more information, refer to the Oracle Solaris vmstat(1M) man page or the mpstat(1M) man page.

   If the performance issue points to the driver, profile the call stack for bnxt by using the DTrace script. For more information about the DTrace script, go to My Oracle Support.

Related Information

• Analyze Why the Device Link Is Missing (Oracle Solaris x86)

• Recover From a Port Hang (Oracle Solaris x86)

• Analyze Why the Link Is Not Up After Back-To-Back Cable Connection (Oracle Solaris x86)

• Analyze Why Changing the MTU Does Not Correctly Set the Link Property (Oracle Solaris x86)