Скачать или смотреть Extending Container Performance Isolation: Regulating Memory Bandwidth & Cache in... Jonathan Perry

Don't miss out! Join us at the next Open Source Summit in Hyderabad, India (August 5); Amsterdam, Netherland (August 25-29); Seoul, South Korea (November 4-5). Join us at the premier vendor-neutral open source conference, where developers and technologists come together to collaborate, share knowledge, and explore the latest innovations and advancements in open source technology. Learn more at https://events.linuxfoundation.org/

Extending Container Performance Isolation: Regulating Memory Bandwidth & Cache in the Kernel - Jonathan Perry, Unvariance

While containers provide isolation for CPU cycles and memory capacity, they offer limited protection against performance interference through shared CPU caches and memory bandwidth. Such contention was shown to increase application response times by 4-13x. The Linux resctrl infrastructure provides monitoring and control mechanisms, but has limitations for controlling real-world applications.

For example, new cgroups do not form new resctrl groups, leaving any newly started containers and systemd services improperly monitored and controlled. Additionally, the current filesystem-based interface makes it difficult to build a controller that can monitor and adjust quickly enough to keep up with frequently changing application memory behavior.

This talk introduces the memory interference problem and proposes new kernel mechanisms to address these limitations. A new collector captures per-process measurements of memory bandwidth usage at millisecond frequencies. We'll cover how the collector combines eBPF, high-resolution timers, and perf counters to achieve this, and how resctrl can be supported in this framework. We'll discuss future work and opportunities for collaboration.