Resetting Kernel Tracing

After you have copied the trace buffer into a TNF file, reset kernel tracing by disabling all probes and deallocating the buffer. This is important because it brings the performance of the kernel back to where it was before you started tracing.

Use the standard prex commands to disable and untrace all probes.

prex> disable $all      # disable all probes 	
prex> untrace $all      # untrace all probes 	
prex>

Finally, use the prex buffer command to deallocate the trace buffer.

Do not deallocate the trace buffer until you have copied it out into a trace file. Otherwise, you will lose the trace data you collected for your experiment.

prex> buffer dealloc	   # deallocate buffer 	
buffer deallocated
prex>

You can now quit prex and examine the trace data that you have collected.

prex> quit 	
#