Oracle^® Dual Port 25/100 Gb Ethernet Adapter User's Guide, Mellanox

Analyze Slow Network Performance (Oracle Solaris x86/64)

The adapter supports several driver parameters that affect the performance of the ports.

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 mpstate (1M) man page (https://docs.oracle.com/cd/E36784_01/html/E36871/makehtml-id-7.html#scrolltoc).

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

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