Ruby with BPF eBPF Summit ## Why BPF? ## Why BPF? ## - Flexibility ## Why BPF? - Flexibility - Low overhead ## Why BPF? - Flexibility - Low overhead - Continuous profiling ## Why BPF? - Flexibility stack walking for a dynamic language - Supporting multiple Ruby versions - Correctness testing - BPF safety features ## Future plans - Integrate in Facebook’s profiling infra - Rewrite OSS driver program

## Containers and BPF: twagent story Andrey Ignatov, Facebook eBPF Summit ## twagent • a daemon - runs on every Facebook server • manages all Facebook containers - a part of the bigger TW system cgroup v2 • ... other usual building blocks ... • cgroup-bpf programs ## cgroup-bpf Vast majority of twagent tasks have one or more cgroup-bpf features enabled: • mostly networking: ☐ IP assignment but not only: - sysctl access control Let's look at some of them ... ## Example of cgroup-bpf programs (bpftool cgroup tree): ![Image](/uploads/documents/1/4/a/7/14a78f1665ead57299ddbea78431f846/p3_1

## Debugging the BPF Virtual Machine eBPF Summit ## Why? ● Debugging is useful to understand how things work ● Sometimes, eBPF programs can’t even load - I couldn’t find good resources on this, so so, here I am ● I break lots of eBPF programs - The BPF Virtual machine is not easy to understand ## The approach ## The BPF subsystem lives in the kernel  target remote localhost:1234 (gdb) bpf/syscall.c:4180 (gdb) bpf/syscall.c:796 (gdb) b bpf/syscall.c:121 (gdb) b kernel/bpf/ringbuf.c:159 ## Remember to: - Load the eBPF program

to ship BPF with your Go project Lorenz Bauer eBPF Summit ## Goal • Count the number of packets on lo • Print the count to the console • From a single Go binary #### github.com/lmb/ship-bpf-with-go

RedBPF eBPF Summit ## I n This Talk • Different “types” of BPF programs • Write BPF programs in Rust • Add new feature in RedBPF • Use BPF maps to make stateful decisions • Load the program and protect Engineer @ CCP Games • @aquarhead on GitHub, Twitter... • Rust (and Elixir) • Disclaimer: new to BPF & kernel networking, pardon my mistake and welcome corrections! ## Sad Rabbit Has No Memory • - But adding such a feature in RabbitMQ could be a long process... ## Build a Limiter in BPF • Let's use BPF to get a quick win! • Track how many “AMQP consumers” have been declared for each connection

## Steering connections to sockets with BPF socket lookup hook Jakub Sitnicki, Cloudflare @jkbs0 @cloudflare eBPF Summit ## Who am I? - Software Engineer at Cloudflare Spectrum TCP/UDP reverse proxy proxy, Linux kernel, ... - Contributor to Linux kernel networking & BPF subsystems Goal Fun? ## We will need VM running Linux kernel 5.9+ bpftool 5.9+ libbpf headers ☐ kernel headers ## vm $ uname dispatch with BPF socket lookup packet metadata struct bpf_sk_lookup { __u32 family; __u32 protocol; __u32 remote_ip4; __u32 remote_port; __u32 local_ip4; __u32 local_port; /* ... */ }; BPF program

95172c2e53dd/p1_1.jpg) # 复杂环境下的视觉同时定位与地图构建 章国锋 浙江大学CAD&CG国家重点实验室 主办方 Geekbang. InfoQ ## SLAM: 同时定位与地图构建 • 机器人和计算机视觉领域的基本问题 - 在未知环境中定位自身方位并同时构建环境三维地图 - 广泛的应用 • 增强现实、虚拟现实 - 机器人、无人驾驶  Frames [Image](/uploads/documents/e/4/9/3/e49344461e365e22bb8395172c2e53dd/p8_1.jpg) Google无人车项目Waymo 使用高精度激光雷达构建地图  MobileEye、特斯拉等自动驾驶方案以廉价的摄像头为主

## 如何利用深度学习提高高精地图生产的自动化率 DeepMap 邹亮 2019-05-08 ## 极客邦科技 会议推荐2019  ## QCon 北京 ## 全球软件开发大会 大会：5月6–8日 培训：5月9–10日 QCon 培训：11月23–24日 ## DEEPMAP ## 自我简介 2006年加入Google Earth/Maps，在谷歌工作9+年 2016年作为创始工程师加入DeepMap 现任工程总监，负责高精地图的采集、制作、更新和维护整个流程及 大中华地区的工程技术。 ## DEEPMAP DEEPMAP公司简介 - 资深团队 | 丰富的产品经验  苹果地图首发团队和负责人 ![Image](/uploads/documents/5/a/6/0/5a

 ## 如何使用影响地图发觉有价值的需求 ## 廖靖斌 Scrum中文网和Leangoo创始人 中国早期的Scrum及敏捷实践者。 2010年参与筹办中国敏捷联盟，担任副秘书长 Mike Cohn的扛鼎之作《Succeeding With 最敏捷的项目协作工具 ## 如何使用影响地图发掘有价值的需求 Eric Liao 企业版咨询热线：400-696-6280 邮箱：info@leangoo.com 官网：www.leangoo.com ## 内容 · 什么是影响地图？ - 影响地图的价值？ - 影响地图有哪些的核心要素？ • 如何在实践中应用影响地图？ ## 什么是影响地图 ## 影响地图 - 发明人是Example of specification《实例化需求》一书的伟大贡献之后(获得 2012年 Jolt Award 年度最佳图书大奖) 2012年10月他发行了 Impact Mapping《影响地图》这本只有三个部份，共73页的小册子。它展现了一种「让需求可视化的能力」 ## 影响地图 让软件产生真正的影响力 Impact Mapping: Making a big impact with software products and

Describes how to troubleshoot Cilium in different deployment modes. - BPF and XDP Reference Guide : Provides a technical deep dive of BPF and XDP technology, primarily focused at developers. • API Reference Jenkins for testing • CI Failure Triage • Infrastructure details • BPF and XDP Reference Guide • BPF Architecture • Toolchain • Program Types • Further Reading • is a new Linux kernel technology called BPF, which enables the dynamic insertion of powerful security visibility and control logic within Linux itself. Because BPF runs inside the Linux kernel, Cilium security