Linux perf is a crucial performance analysis tool at Netflix, and is used by a self-service GUI for generating CPU flame graphs and other reports. This sounds like an easy task, however, getting perf to work properly in VM guests running Java, Node.js, containers, and...
The in-kernel Berkeley Packet Filter (BPF) has been enhanced in recent kernels to do much more than just filtering packets. It can now run user-defined programs on events, such as on tracepoints, kprobes, uprobes, and perf_events, allowing advanced performance...
The effort to merge the real-time preemption patch into the mainline kernel requires to refactor existing infrastructure in the kernel. Such refactoring work is intrusive and potentially disruptive. This talk will take a close look at recent refactoring work and...
Continous integration has gained a lot of popularity in the open source world in recent years, with the loud/web world at the forefront. The kernel world has however been somewhat slow to catch-up, especially in the embedded world, services like KernelCi and the 0-day...
UARTs and RS-232 have been around since the 1960s, and despite the advent of technologies like USB and PCIe, it seems UART-attached devices are not going away anytime soon. In embedded systems, UARTs are a commonly used peripheral interface (e.g. for Bluetooth, NFC,...
