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Débogage et profilage d’applications C++ sous Linux

La formation “Débogage et profilage d’applications C++ sous Linux” enseigne les techniques de débogage et profilage d’applications sous Linux. A l’issue de la formation, les participants seront capables d’appliquer leur nouveau savoir-faire pour la recherche et la résolution de problèmes dans leurs applications C++ sous Linux, qu’il s’agisse de dysfonctionnements ou de problèmes de performance. […]

Heaptrack v1.0.0 Release First stable release of the fast Linux heap memory profiler

I’m extremely happy to finally announce the first stable release of heaptrack, the FOSS heap memory profiler for C/C++ Linux applications. You can download the source tarball from the KDE mirrors: https://download.kde.org/stable/heaptrack/1.0.0/src/ Heaptrack is a fast heap memory profiler that runs on Linux. It allows you to track all heap memory allocations at run-time. Afterwards, the accompanying GUI […]

Slaying Latency with Linux Kernel Tracepoints

Knowing what tools are at your disposal when looking to make a program faster or keep it operating smoothly is critical to your success as a programmer. We recently solved a performance problem using Linux Kernel Tracepoints so we thought we’d share the process with you so that you can see for yourself if this […]

GammaRay: Taking a deep look into your Qt application Volker Krause

GammaRay is a high-level runtime introspection tool for Qt applications. In this talk we will look at a number of real-world debugging and profiling problems and how the capabilities provided by GammaRay help you with those. When creating applications we strive to use higher-level frameworks to obtain results quickly and reduce development effort and long-term […]

What is GammaRay? – 3 reasons to start using it today

What is GammaRay?  For starters, it’s a powerful electromagnetic wave, as well as a way to treat cancer. It’s also an under-appreciated German speed metal band. And it’s what gives Dr. Bruce Banner his big green alter ego. But Qt aficionados will know the GammaRay that we’re talking about is an uber-powerful Qt debugger and introspection tool. If you’re […]

How to use static analysis to improve performance

It’s usually said “only improve performance where a profiler tells you to“. I don’t completely agree. Take a big C++ library like Qt: can you profile all classes and all code paths ? It would take a couple of years to accomplish and analyse the results. It’s expensive: It usually only happens if the speed-up […]

Analysing QtQuick apps with GammaRay or “Why is my button gone?”

This is a typical situation when you program a GUI for an application. You have just created a new control, you start your application and… no control. But now: Is it obscured? Is it misplaced? Is it completely transparent or set to ‘invisible’? Is my custom OpenGL-stuff broken or is the item actually not created for […]

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