TotalView Users Guide - CI Wiki

Examining and Analyzing Arrays
This syntax differs from Fortran 90 syntax in that Fortran 90 requires that
you explicitly enter the upper and lower bounds when you’re reversing the
order for displaying array elements.
Because the default value for the stride is 1, you can omit the stride (and
the colon that precedes it) from your definition. For example, the following
two definitions display array elements 0 through 9:
[0:9:1]
[0:9]
If the lower and upper bounds are the same, just use a single number. For
example, the following two definitions tell TotalView to display array element
9:
[9:9:1]
[9]
The lower_bound, upper_bound, and stride must be constants. They cannot be expressions.
Example 1 A slice declaration of [::2] for a C or C++ array (with a default lower bound
of 0) tells TotalView to display elements with even indices of the array; that
is, 0, 2, 4, and so on. However, if this were defined for a Fortran array
(where the default lower bound is 1), TotalView displays elements with odd
indices of the array; that is, 1, 3, 5, and so on.
Example 2 The following figure displays a stride of (::9,::9). This definition displays the
four corners of a ten-element by ten-element Fortran array.
Figure 211: Stride Displaying
the Four Corners of an
Array
Example 3 You can use a stride to invert the order and skip elements. For example, the
following slice begins with the upper bound of the array and displays every
other element until it reaches the lower bound of the array:
(::–2)
Using (::–2) with a Fortran integer(10) array tells TotalView to display the
elements 10, 8, 6, 4, and 2.
Example 4 You can simultaneously invert the array’s order and limit its extent to display
a small section of a large array. The following figure shows how to
TotalView Users Guide: version 8.7 335