smallnest

#include <linux/bpf.h>
#include <linux/in.h>
#include <linux/if_ether.h>
#include <linux/ip.h>

#define SEC(NAME) __attribute__((section(NAME), used))

SEC("dropper_main")
int dropper(struct xdp_md *ctx) {
  int ipsize = 0;

smallnest

/*
 * xdp_manglepong.c - sample XDP program
 * Copyright (C) 2019 Matteo Croce <mcroce@redhat.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,

smallnest

#!/usr/bin/env python
#
# A script that runs the commands to perform Netflix's
# "Linux Performance Analysis in 60,000 Milliseconds"
#
# (http://techblog.netflix.com/2015/11/linux-performance-analysis-in-60s.html)
#
import subprocess
import datetime
import argparse

smallnest

...
func faviconHandler(w http.ResponseWriter, r *http.Request) {
	http.ServeFile(w, r, "relative/path/to/favicon.ico")
}
...
func main() {
  http.HandleFunc("/favicon.ico", faviconHandler)
}

smallnest

$ go tool dist list
android/386
android/amd64
android/arm
android/arm64
darwin/386
darwin/amd64
darwin/arm
darwin/arm64
dragonfly/amd64

smallnest

# --------
# Hardware
# --------

# Opcode - operational code
# Assebly mnemonic - abbreviation for an operation

# Instruction Code Format (IA-32)
# - Optional instruction prefix
# - Operational code

smallnest

bpf filter: "ip"
(000) ldh      [12]
(001) jeq      #0x800           jt 2	jf 3
(002) ret      #96
(003) ret      #0


(000) ldh      [12]
  Load half word at packet offset 12
   Offset 12 is the eth type.

smallnest

smallnest

//
// This is just a collection of syscalls that are used by libsctp linux implementation.
// Although it supports message-oriented workflow, it can't be wrapped into a net.PacketConn.
//

package main

import (
	"log"
	"syscall"

smallnest

Benchmark commands

Producer

Setup

bin/kafka-topics.sh \
  --zookeeper zookeeper.example.com:2181 \
  --create \