The MPI Timeline Controls tab

The MPI Timeline Controls tab supports zoom, pan, event-step, and filtering for the MPI Timeline tab. It includes a control to adjust the percentage of MPI messages shown on MPI Timeline tab.

Filtering causes data outside the current field of view to be eliminated from the data set shown in the MPI Timeline tab and the MPI Chart tab. A filter is applied by clicking the Filter button. The back-filter button is used to undo the last filter; the forward-filter button is used to reapply a filter. Filters are shared between the MPI Timeline tab and the MPI Chart tab, but are not currently applied to other tabs.

The message slider can be adjusted to control the percentage of messages displayed. When you select less than 100%, priority is given to the most costly messages. Cost is defined as the time spent in the message's send and receive functions.

The MPI Timeline Controls tab is also used to show the details for a function or message selection from the MPI Timeline tab.