florianl

python3 -c "
import struct
import sys

def parse_partition_table(filename):
    with open(filename, 'rb') as f:
        data = f.read()
    
    partitions = []
    offset = 0

florianl

florianl

From 461be79cb4e3275b54727fff506799c063ae13ed Mon Sep 17 00:00:00 2001
From: Florian Lehner <dev@der-flo.net>
Date: Wed, 11 Jun 2025 21:29:53 +0200
Subject: [PATCH] Support new flight recorder format

Signed-off-by: Florian Lehner <dev@der-flo.net>
---
 cmd/gotraceui/goroutine.go |  4 ++--
 cmd/gotraceui/span.go      |  5 ++---
 go.mod                     |  4 ++--

florianl

$ benchstat old.txt new.txt
goos: linux
goarch: amd64
pkg: go.opentelemetry.io/ebpf-profiler/interpreter/go
cpu: 12th Gen Intel(R) Core(TM) i7-12700H
          │   old.txt   │               new.txt               │
          │   sec/op    │   sec/op     vs base                │
Golang-20   6.352m ± 1%   4.877m ± 7%  -23.23% (p=0.000 n=10)

          │  old.txt   │                   new.txt                    │

florianl

.PHONY: all

all:
	gcc -o bottleneck main.c -pthread

florianl

package modulo

func fastModulo(x, n uint32) uint32 {
	return uint32((uint64(x) * uint64(n)) >> 32)
}

func regularModulo(x, n uint32) uint32 {
	return x % n
}

florianl

package main

import (
	"fmt"
	"net"
	"os"

	"github.com/florianl/go-tc"
	"github.com/florianl/go-tc/core"
	"github.com/jsimonetti/rtnetlink"

florianl

#!/usr/bin/env bpftrace

/*
 *  sudo bpftrace nvidia-smi.bt -o nvidia-smi.$(date +%s%N | cut -b1-13).out
 *
 *  Dump is limited to 64 byte as enforced by BPFTRACE_STRLEN and stack size limitations.
 */
BEGIN
{
	printf("Tracing nvidia-smi ioctl calls ... Hit Ctrl-C to end.\n\n");

florianl

package main

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

	"github.com/cilium/ebpf"
)

florianl

package main

import (
	"errors"
	"log"
	"os"
	"os/signal"
	"strconv"
	"syscall"