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Bartosz Taudul 2021-04-20 18:34:08 +02:00
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@ -3244,6 +3244,8 @@ An assembly instruction may be associated with only a single source line, but a
If automated call stack sampling (see chapter~\ref{sampling}) was performed, additional profiling information will be available. The first column of source and assembly views will contain percentage counts of collected instruction pointer samples for each displayed line, both in numerical and graphical bar form. This information can be used to determine which line of the function takes the most time. The displayed percentage values are heat map color coded, with the lowest values mapped to dark red, and the highest values mapped to bright yellow. The color code will appear next to the percentage value, and on the scroll bar, so that 'hot' places in code can be identified at a glance.
By default samples are displayed only from within the selected symbol, in isolation. In some cases you may however want to include samples from functions that were called. To do so, enable the \emph{\faSignOut*{}~Child calls} option, which may also be temporarily toggled by pressing the \keys{Z} key. Make sure to familiarize yourself with section~\ref{readingcallstacks} to be able to properly read the results.
Instruction timings can be viewed as a group. To begin constructing such group, click the \LMB{}~left mouse button on the percentage value. Additional instructions can be added using the \keys{\ctrl}~key, while holding the \keys{\shift}~key will allow selection of a range. To cancel the selection, click the \RMB{}~right mouse button on a percentage value. Group statistics can be seen at the bottom of the pane.
Clicking the \MMB{}~middle mouse button on the percentage value of an assembly instruction will display entry call stacks of the selected sample (see chapter~\ref{sampleparents}). This functionality is only available for instructions that have collected sampling data, and only in the assembly view, as the source code may be inlined multiple times, which would result in ambiguous location data. Note that number of entry call stacks is displayed in a tooltip, for a quick reference.