TotalView Users Guide - CI Wiki

Figure 218: Array Statistics
Window
Examining and Analyzing Arrays
in which values are stored in memory. If you alter what TotalView is displaying
by using a filter or a slice, TotalView just sorts the values that could be
displayed; it doesn’t sort all of the array.
If you are displaying the array created by a Show across command—see
“Displaying a Variable in all Processes or Threads” on page 345 for more information—you
can sort your information by process or thread.
Obtaining Array Statistics
The Tools > Statistics command displays a window that contains information
about your array. Figure 218 shows an example.
If you have added a filter or a slice, these statistics describe only the information
currently being displayed; they do not describe the entire unfiltered
array. For example, if 90% of an array’s values are less than 0 and you filter
the array to show only values greater than 0, the median value is positive
even though the array’s real median value is less than 0.
TotalView displays the following statistics:
� Checksum
A checksum value for the array elements.
� Count
The total number of displayed array values. If you’re displaying a floatingpoint
array, this number doesn’t include NaN or Infinity values.
� Denormalized Count
A count of the number of denormalized values found in a floating-point
array. This includes both negative and positive denormalized values as
defined in the IEEE floating-point standard. Unlike other floating-point
statistics, these elements participate in the statistical calculations.
TotalView Users Guide: version 8.7 343