Analyze Slow Network Performance (Oracle Solaris)

The adapter supports several driver parameters that affect the performance of the ports. See Driver Parameters (Oracle Solaris) 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, try setting logging to dump to the /tmp directory. Then, retest to ensure that the new configuration improved performance.

4. Use the vmstat(1M) and the mpstat(1M) 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).

   If the performance issue points to the driver, try to profile the call stack for i40e(7D) by using the DTrace script. For more information about the DTrace script, go to:

   http://support.oracle.com

Related Information

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

• Recover From a Port Hang (Oracle Solaris)

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

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