Use the filtering dialog box to specify filter expressions that describe which function events, messages and collective operations are to be filtered out and which are to be shown.

To access the Filtering dialog box, go to

Advanced > Filtering

or use the toolbar button.

In the

Definition of Filter Expression

section of this dialog box, select the mode to define the filter expression:

You can build a filter expression using either the GUI interface or the manual mode, either way the resulting expression is parsed upon each change.

If the current expression cannot be converted into a proper filter definition, a red warning indicating the reason is displayed.

If the expression uses filter attributes that require bypassing them in memory trace cache, a warning message is presented that indicates the need to process data directly from the trace file and the additional time required for the analysis.