Communication Volume This is the Communication Volume metric of your program's performance, i.e., the total volume of message traffic in kilobytes that were send by each node. This can only be viewed in two-D by nodes. General Information Selecting Metric - Other metrics of your program's performance can be selected by the pressing right button in the data window and selecting the metric from the menu. Selecting Data - Elements of the chart data can be selected by either clicking on them with the left button or dragging the mouse with the left button depressed. Entire rows or columns can be selected by clicking on the row or column title. Data elements can be deselected by clicking again on the element itself, its row or column heading, or pressing Clear. Selected data is required by the Usage, Calls, Statistics, and Subset buttons. Usage - For one selected procedure, this displays the number of Commits and Failures for the procedure's clauses. This can be done for any non-empty subset of nodes. Calls - For one selected procedure, this displays the other procedures that called it and how many times. This can be done for any non-empty subset of nodes. Statistics - For any number of selected elements, this displays basic statistical information: mean, standard deviation, min and max. Subset - This displays all selected data in a separate Gauge window that can be manipulated independently. NOTE: Subset produces a new window with the Execution Time display and with a rescaled chart. This can cause the subset data to look different. Clear - Clear all selected data. Color Scale - Toggle the display of the gray or color scale. Help - This window. Info - General information about the current counter file. Quit - Quit Gauge. Zoom/Unzoom - Expand (unexpand) the current data to fill the chart window. Log Scale/Linear Scale - Select either logarithmic or linear scales. Bucket/Unbucket - Display (undisplay) the data in a histogram. Sort/Unsort - Sort/Unsort procedure names. ThreeD/ByProcedures/ByNodes - Select view of data. ThreeD produces a three-dimensional view of data, i.e., by procedure and node. ByProcedures and ByNodes collapses across the other dimension. Some views are disabled when inappropriate.