Using KCachegrind

Complete: 3

Goal of the page

This page is intended to provide a short introduction to the kcachegrind tool and its usage to analyze the performance of CMS offline code


Vincenzo Innocente
Robin Moser


KCachegrind is s a visualization tool for the profiling data generated by Cachegrind and Callgrind (they profile data file format is upwards compatible). But as most visualization possibilities of KCachegrind depend on call relationships, you get much more out of it if your are using Callgrind as profile tool.

KCachegrind can also be used to visualize the results of other profiling tools if a converter to the callgrind format is provided. This is the case for both OProfile and CMS.IgProf.


KCachegrind is part of the KDE distribution and therefore available on most of the Linux distributions. Versions for other operating systems such as MacOS are also available. CMS distributes its own version of KCachegrind. We recommend therefore to use the version made available in the CMSSW runtime environment. To start KCachegrind just type kcachegrind& in a shell initialized with the CMSSW runtime environment. KCachegrind is available in SLC4 as part of the kdesdk package.


Please refer to the official documentation available on the web or with the KDE distribution.


For more example and a tutorial on how to use KCachegrind with cms offline software please refer to the workbook.

Review status

Reviewer/Editor and Date (copy from screen) Comments
KatiLassilaPerini - 15 Mar 2007 created template page

Responsible: VincenzoInnocente
Last reviewed by: Most recent reviewer

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Topic revision: r4 - 2008-08-07 - ThomasThemel

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