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Doc: Describe new flame graphs in QML Profiler

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You can now visualize memory consumption and allocations
of functions in addition to their time consumption.

Change-Id: I1c36019a5e3a161332a956a4b2d4aa833ea781dc
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
This commit is contained in:
Leena Miettinen
2016-10-27 15:30:42 +02:00
parent aa118539a4
commit 7b25da7e22
2 changed files with 15 additions and 3 deletions
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doc/src/analyze/qtquick-profiler.qdoc
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@@ -557,14 +557,26 @@
\section2 Visualizing Statistics as Flame Graphs
The \uicontrol {Flame Graph} view shows a more concise statistical overview
of QML and JavaScript execution. The horizontal bars show the amount of
of QML and JavaScript execution. In the \uicontrol {Visualize Total Time}
view, the horizontal bars show the amount of
time all invocations of a certain function took together, relative to the
total runtime of all JavaScript and QML events. The nesting shows which
functions were called by which other ones. Mind that, unlike the
functions were called by which other ones.
\image qml-profiler-flamegraph.png "Flame Graph View"
To view the total amount of memory allocated by the functions in the
\uicontrol {Visualize Memory} view, select \uicontrol Memory in the
drop-down menu (1).
To view the the number of memory allocations performed by the functions in
the \uicontrol {Visualize Allocations} view, select \uicontrol Allocations
in the drop-down menu.
Unlike the
\uicontrol Timeline view, the \uicontrol {Flame Graph} view does not show the
time spans when no QML or JavaScript is running at all. Thus, it is not
suitable for analyzing per frame execution times. However, it is very easy
to see the total impact of the various QML and JavaScript events there.
\image qml-profiler-flamegraph.png "Flame Graph View"
*/