Phillip Sitbon sitbon

Dealing with the Linux OOM Killer at the program level

Do this in cases when you dont want to change the os-level settings, but only want to disable the OOM killer for a single process. This is useful when youre on a shared machine/server.

The OOM killer uses the process level metric called oom_score_adj to decide if/when to kill a process. This file is present in /proc/$pid/oom_score_adj. The oom_score_adj can vary from -1000 to 1000, by default it is 0.

You can add a large negative score to this file to reduce the probability of your process getting picked and terminated by OOM killer. When you set it to -1000, it can use 100% memory and still avoid getting terminated by OOM killer.

Implementing Sign In with Apple in your Django (Python) backend

Apple announced a new feature, "Sign In with Apple" enabling users to sign in to apps using their Apple ID. This new feature is meant to be a secure and privacy-friendly way for users to create an account in apps. Most iOS and Mac users already have an Apple ID, and this new feature lets them use that Apple ID to sign in to other apps and websites.

Apple is taking a firm stance to protect user's privacy, rather than letting applications see the user's real email address, they will provide the app with a fake or random email address unique to each app. Don't you worry! Developers will still be able to send emails to these proxy addresses, it just means developers won't be able to use the email addresses in any other way. This feature will also allow users to disable email forwarding per application.

How it works

Apple adopted the existing standards OAuth 2.0 and OpenID Connect to use as the foundation for their new API. If you're familiar

Audio Plugin for Audio to MIDI transcription using deep learning (exe, app, vst3, component)

https://github.com/DamRsn/NeuralNote

Recurrent Neural Network for generating piano MIDI-files from audio (MP3, WAV, etc.)

https://github.com/BShakhovsky/PolyphonicPianoTranscription

A python program which performs an FFT on an audio file and produces a MIDI file from the results

https://github.com/NFJones/audio-to-midi

Extract the melody from an audio file and export to MIDI

Sample config for 2 million web socket connection

    sysctl -w fs.file-max=12000500
    sysctl -w fs.nr_open=20000500
    # Set the maximum number of open file descriptors
    ulimit -n 20000000

    # Set the memory size for TCP with minimum, default and maximum thresholds 
 sysctl -w net.ipv4.tcp_mem='10000000 10000000 10000000'

Programming as Theory Building

Peter Naur

Peter Naur's classic 1985 essay "Programming as Theory Building" argues that a program is not its source code. A program is a shared mental construct (he uses the word theory) that lives in the minds of the people who work on it. If you lose the people, you lose the program. The code is merely a written representation of the program, and it's lossy, so you can't reconstruct

Intro

This note describes how to connect two networks/devices/VMs over public network using Wireguard with Layer 2 support (ARP, IPv6 link-local, etc).

This can also be achieved using SSH and its "tap" tunnel, however, it does not provide the same level of latency and bandwidth as full-blown VPN such as Wireguard.

In addition, this note describes how to tunnel Wireguard over TCP connection. This may be of use if you encounter firewall in-between so, for instance, you can use TCP port 443 only.

Objective

Naty's FFXIV: Dawntrail Add-ons, Plugins and Mods

Last Updated: Patch 7.35

Advanced Combat Tracker

The program which most people use for parsing in FFXIV and several other MMOs. For an open source alternative consider using IINACT though configuring it won't be covered here.

Options

Main Table Encounters
- General
  - Uncheck: Number of seconds to wait after the last combat action to begin a new encounter.
  - Uncheck: Number of seconds to wait after the last combat action to pause the encounter duration.

	import ctypes
	import os
	import signal
	from typing import Callable

	libc = ctypes.CDLL("libc.so.6", use_errno=True)

	# <linux/prctl.h>
	PR_SET_NAME = 15
	PR_SET_SECCOMP = 22

	import os
	import pickle
	from google.auth.transport.requests import Request # pip install --upgrade google-api-python-client google-auth-httplib2 google-auth-oauthlib
	from google_auth_oauthlib.flow import InstalledAppFlow
	from googleapiclient.discovery import build
	from django.db import models
	from django.conf import settings

	# Create your models here.
	class Greeting(models.Model):