continous map lookups

lookups.go

package main

import (
	"fmt"
	"math/rand"
	"os"
	"unsafe"

	"github.com/cilium/ebpf"
)

func main() {
	rand.Seed(73)

	hash, err := ebpf.NewMap(&ebpf.MapSpec{
		Type:       ebpf.Hash,
		KeySize:    4,       // size of uint32
		ValueSize:  4,       // size of uint32
		MaxEntries: 2097152, // 2^21
	})
	if err != nil {
		fmt.Fprintf(os.Stderr, "Loading map failed: %v\n", err)
		return
	}
	defer func() {
		if err := hash.Close(); err != nil {
			fmt.Fprintf(os.Stderr, "Failed to remove map: %v\n", err)
		}
	}()

	var key, value uint32
	for {
    // Get a random key to lookup in the map
		key = rand.Uint32()
		if err := hash.Lookup(unsafe.Pointer(&key), unsafe.Pointer(&value)); err != nil {
			fmt.Fprintf(os.Stderr, "Failed to lookkup %d: %v\n", key, err)
		}
	}

}