Introduction to BPF

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Sagar Rakshe

BPF or eBPF have opened the doors to Observability in the Systems.

Engineering

BPF
“One of the more interesting features in this cycle is the ability to attach eBPF programs
(user-deﬁned, sandboxed bytecode executed by the kernel) to kprobes. This allows
user-deﬁned instrumentation on a live kernel image that can never crash, hang or interfere
with the kernel negatively”
~ Ingo Molnár

BPF: Probes
● Kernel
● Tracepoints
● User-Space
● User Statically Deﬁned Tracepoints

BPF: Program Types
● Socket
● Tracepoint
● XDP
● Pef Events

BPF: Visualization
● Flamegraphs
● Histograms

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Introduction to BPF

1. eBPF/BPF Sagar Rakshe One2n Consulting

3. BPF “One of the more interesting features in this cycle is the ability to attach eBPF programs (user-deﬁned, sandboxed bytecode executed by the kernel) to kprobes. This allows user-deﬁned instrumentation on a live kernel image that can never crash, hang or interfere with the kernel negatively” ~ Ingo Molnár

4. BPF

5. BPF

6. BPF: Evolution

7. BPF: Architecture

8. BPF: Architecture

9. BPF: Demo “Hello World!”

10. BPF: Maps

11.

12. BPF: Probes ● Kernel ● Tracepoints ● User-Space ● User Statically Deﬁned Tracepoints

13. BPF: Program Types ● Socket ● Tracepoint ● XDP ● Pef Events

14. BPF: Visualization ● Flamegraphs ● Histograms

15.