Events and the Kernel

The QNX Neutrino microkernel generates events for more than just system calls. The following are some of the activities that generate events:

• kernel calls
• scheduling activity
• interrupt handling
• thread/process creation, destruction, and state changes

In addition, the instrumented kernel also inserts “artificial” events for:

• time events
• user events that may be used as “marker flags”

Also, single kernel calls or system activities may actually generate more than one event.