We are pleased to announce a new release of our Hotspot Linux perf performance analysis GUI, Hotspot version 1.3.0! Hotspot is a replacement for perf reportthat takes a perf.data file, parses and evaluates its contents, and then displays the result in a graphical form. You can read a bit more about Hotspot here: https://www.kdab.com/hotspot-gui-linux-perf-profiler/ Overview […]
Tooling Get the RSS Feed
Qt 3D, being a retained mode high level graphic API abstraction, tries to hide most of the details involved in rendering the data provided by applications. It makes a lot of decisions and operations in the background in order to get pixels on the screen. But, because Qt 3D also has very rich API, developers […]
We have released version 2.11.1 of our Qt application introspection tool GammaRay. The changes mainly focus on establishing full compatibility with Qt 5.14 as well as bugfixes and performance improvements, but there’s also a few new features. Areas most affected by changes in Qt 5.14 are the inspection of Qt Quick software rendering, deployment on […]
KD SOAP is a tool for creating client applications for web services. The release of 1.9.0 brings a fair number of improvements and fixes, as the following text describes. General C++11 is now required. Qt4 is still supported, but this is the last release with support for Qt4. rpath for Unix/Linux/macOS (#181) is now fixed. […]
Embedded World – 25-27 February 2020 February 2020 will be the tenth year that KDAB exhibits at Embedded World, in Nuremberg, Germany. When we started exhibiting, there were only five halls compared to today’s seven, so the event continues to grow and remain relevant, in a world where most interaction takes place on-line. In those […]
KUESA™ is a solution that provides an integrated and unified workflow for designers and developers to create, optimize and integrate real time 3D content in a 3D or hybrid 2D/3D software user interface. Models, including geometry, materials, animations and more, can smoothly be shared between designers and developers. Kuesa relies on glTF 2.0, an open standard […]
In the previous two blogs in this series I showed how solving an apparently simple problem about loading a lot of data into RAM using mmap() also turned out to require a solution that improved CPU use across cores. In this blog, I’ll show how we dealt with the bottleneck problems that ensued, and finally, […]
We have released version 2.11.0 of our Qt application monitoring tool GammaRay. GammaRay allows you to observe behavior and data structures of Qt code inside your program live at runtime. GammaRay 2.11 comes with a new inspection tool for Qt’s event handling, providing even more insights into the inner working of your application. Besides looking […]
In Part 1 of this series we solved the problem of using mmap() to load large set of data into RAM all at once. The catch was that it still took too long. In this blog, I describe how we solve this.
We got a call from a bioinformatics group at a European university. The problem appeared simple, how to usemmap() to load a large data set into RAM all at once. OK, no problem I thought...