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Systemtap language reference

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Chapter 4. Probe points

implementation, except for generic cycle and instructions events, which are available on all

processors. The probe perfmon.counter(event) starts a counter on the processor which counts

the number of events that occur on that processor. For more details about the performance monitoring

events available on a specific processor, see the help text returned by typing the perfmon2 command

pfmon -l.

4.8.1. $counter

$counter is a handle used in the body of a probe for operations involving the counter associated with

the probe.

read_counter is a function passed to the handle for a perfmon probe. It returns the current count for

the event.

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