off

for performance analysis,

on

otherwise

Some platforms support the automatic stack sampling for MPI calls and user-defined events. Intel Trace Collector then remembers the Program Counter (PC) values on the call stack and translates them to source code locations based on debug information in the executable. It can sample a certain number of levels (

<trace levels>

) and skip the initial levels (

<skip levels>

). Both values can be in the range of

0

to

15

.

Skipping levels is useful when a function is called from within another library and the source code locations within this library shall be ignored.

ON

is equivalent to

0:1

(no skip levels, one trace level).

The value specified with

PCTRACE

applies to all symbols that are not matched by any filter rule or where the relevant filter rule sets the logging state to

ON

. In other words, an explicit logging state in a filter rule overrides the value given with

PCTRACE

.