[Bug gprofng/29633] New: [display text] Support derived metrics

[ruud.vanderpas at oracle dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=29633

            Bug ID: 29633
           Summary: [display text] Support derived metrics
           Product: binutils
           Version: 2.39
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: gprofng
          Assignee: vladimir.mezentsev at oracle dot com
          Reporter: ruud.vanderpas at oracle dot com
  Target Milestone: ---

Very often, derived metrics provide more insight. For example, to normalize
certain events against the number of instructions executed.

Similar to what is already done for the IPC and CPI derived metrics, the user
should have the possibility to include the division of two columns in the
output. Multiple of such derived metrics should be supported.

This brings up a UI issue how the user can pass this on. Possibly by expanding
the metric definition with the two metrics to be divided. For example
e.cyclesDIVinsts.

By using an operator, like DIV here, we can also support other basic arithmetic
operators.

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