**process priority** of the thread in which the event occurs.
* The **hostname** of the system on which the event occurs.
* The Linux kernel and user call stacks (since
- LTTng{nbsp}11).
+ LTTng{nbsp}2.11).
* The current values of many possible **performance counters** using
perf, for example:
** CPU cycles, stalled cycles, idle cycles, and the other cycle types.
----
A schema definition (XSD) is
-https://github.com/lttng/lttng-tools/blob/stable-2.12/src/common/mi-lttng-3.0.xsd[available]
+https://github.com/lttng/lttng-tools/blob/stable-{revision}/src/common/src/common/mi-lttng-4.0.xsd[available]
to ease the integration with external tools as much as possible.