https://github.com/claby2/ebpfcca

🐝 Evaluating eBPF as a Platform for Congestion Control Algorithm Implementation
https://github.com/claby2/ebpfcca

congestion-control ebpf linux tcp

Last synced: 11 days ago
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🐝 Evaluating eBPF as a Platform for Congestion Control Algorithm Implementation

• Host: GitHub
• URL: https://github.com/claby2/ebpfcca
• Owner: claby2
• Created: 2024-10-17T02:59:40.000Z (2 months ago)
• Default Branch: main
• Last Pushed: 2024-12-11T18:41:34.000Z (12 days ago)
• Last Synced: 2024-12-11T19:37:04.015Z (12 days ago)
• Topics: congestion-control, ebpf, linux, tcp
• Language: C
• Homepage:
• Size: 865 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
# eBPF CCA

Evaluating eBPF as a Platform for Congestion Control Algorithm Implementation.

Required packages:

```sh

$ sudo apt install clang libbpf-dev bpftool bpfcc-tools libbpfcc libbpfcc-dev linux-headers-$(uname -r)

```

## Running BPF Cubic

> Source files were taken from Linux kernel (commit hash: `c964ced7726294d40913f2127c3f185a92cb4a41`). The following additional modification was made to `bpf_cubic.c` to satisfy the verifier.

```diff

< 	shift = (a >> (b * 3));

---

> 	shift = ((__u32)a >> (b * 3));

```

### Build, register, and set CCA

```sh

# Build eBPF program

$ cd bpf_cubic/

$ make build

sudo bpftool btf dump file /sys/kernel/btf/vmlinux format c > vmlinux.h

clang-14 -target bpf -I/usr/include/-linux-gnu -g -O2 -o bpf_cubic.o -c bpf_cubic.c

# Register eBPF program

$ sudo bpftool struct_ops register bpf_cubic.o

Registered tcp_congestion_ops cubic id 101

# Set TCP congestion control algorithm to bpf_cubic

$ sudo sysctl -w net.ipv4.tcp_congestion_control=bpf_cubic

net.ipv4.tcp_congestion_control = bpf_cubic

```

### Unregister CCA

```

$ sudo bpftool struct_ops unregister name cubic

Unregistered tcp_congestion_ops cubic id 101

```