He received his PhD in distribution of HPC application threads over hierarchical machines in 2007, the hierarchy part of which was turned and improved into the hwloc library and tools in 2009. His current research interests now also include scheduling tasks on both CPUs and GPUs, and the use of virtualization for HPC. In a second life, he is also a Debian Developer focused on accessibility support (particularly for blind users), and a GNU/Hurd developer. ©2009-2010 RCE