LCU13: Tracing and Debugging for Networking Applications
•
0 gostou•3,036 visualizações
Resource: LCU13 Name: Tracking and Debugging for Networking Applications Date: 29-10-2013 Speaker: Magnus Karlsson Video: http://www.youtube.com/watch?v=z3BdRxMNuwA
Recomendados
Recomendados
Mais conteúdo relacionado
Mais de Linaro
Mais de Linaro (20)
Último
Último (20)
LCU13: Tracing and Debugging for Networking Applications
- 1. Tracing & Debugging for Networking Applications Magnus Karlsson, LSI
- 2. connect.linaro.org • Networking is the application • The networking app runs in user mode • Special HW with highly integrated networking functions • Lots of accelerators Application Domain Networking Apps Linux Control Apps Net stack CPU 0 CPU 1 – CPU N Networking Accelerators & HW Networking SoC User space Kernel space
- 3. connect.linaro.org • Functionality for debugging and performance tuning of networking applications • Reachable from user space • Performance data and traces even from processing that does not touch cores. HW/SW implementation agnostic API • Plug in architecture needed as each vendor’s HW is different • Standard Linux interfaces o CoreSight access library • High resolution timers What is missing? Requirements
- 4. connect.linaro.org • Ftrace • LTTng • Perf • ftrace • Uprobes • Systemtap • Ktap? • GDB • Cat /proc/* • Etc… What to build on? Existing Linux Features
- 5. connect.linaro.org • Access to CoreSight (access lib from ARM) • Device driver for SW annotations to STM • LTTng & ftrace writing to trace buffers (ETB) instead of file • Decoding of ETB data through Linux (not DS-5). Open decoder needed • GDB access to HW trace functionality • Plugin of vendor’s accelerators into ftrace / LTTng • Monitoring core isolation disturbances • What about scalability? • Feature uplift to x86 level? What functionality to target? • What does ODP need? What more to add? What Functionality to Add?
- 6. connect.linaro.org • For many people looking at this, English may be their second, third or fourth language,… • Try and keep bullet points to a minimum • Relevant images are great • Contact marketing (Steve and Jen) if you need some help with images and/or editing Slide 1
- 7. More about Linaro: http://www.linaro.org/about/ More about Linaro engineering: http://www.linaro.org/engineering/ How to join: http://www.linaro.org/about/how-to-join Linaro members: www.linaro.org/members connect.linaro.org