Application-Specific Tuning

Advanced tuning requires closer examination of the application performance.

Onload includes a diagnostic application called onload_stackdump, which can be used to monitor Onload performance and to set tuning options.

The following worked examples demonstrate the use of onload_stackdump to examine aspects of the system performance, and hence to determine which environment variables should be set to tune the application. The process should address these tuning objectives.

• To have as much processing at user-level as possible.

  See Processing at User-Level.

• To have as few interrupts as possible.

  See As Few Interrupts as Possible.

• To eliminate drops.

  See Eliminating Drops.

• To minimize lock contention.

  See Minimizing Lock Contention.

For further examples and use of onload_stackdump refer to onload_stackdump.