LTTng: Tracing across execution layers, from the Hypervisor to user-space Mathieu Desnoyers

This presentation discusses the upcoming changes to be proposed to the kernel tracing field by the LTTng com-munity. It will start by explaining what has been main-lined (per-cpu atomic operations, Linux Kernel Mark-ers.) Then, the focus will turn to the patch set currently developed and for which the mainlining process is in progress. An important part of this presentation will talk about the efficient system-wide user-space tracing infrastructure being designed. Work done for tracing across execution layers, including the Hypervisors, will also be shown. The mainlining status of kernel tracing will be a key el-ement of this talk. Considering the increasing amount of news articles written on this subject, many atten-dees, from the kernel hacker to the system administrator, should find interest in this presentation.