Artem Boldariev arbv

TCP tuning

The most important TCP tuning areas since kernel 4.9 are:

packet pacing
dynamic TSO sizing
TCP small queues
BBR TCP congestion algorithm

Definitions

Gb = gigabit

Build Notes

Environment

Use systemd-nspawn on Arch Linux with debootstrap:

sudo debootstrap --include=systemd-container --components=main,universe jammy ubuntu22.04-rk3568 http://archive.ubuntu.com/ubuntu/

Gogs 0.13 (sqlite) to Gitea 1.0.2 (and upper)

Quoting the Gitea docs:

Upgrading from Gogs 0.12.x and above will be increasingly more difficult as the projects diverge further apart in configuration and schema.

Since gogs has now multiple unfixed RCEs and has for a while, it is imperative to either turn it off or migrate. The problem is, what to do if running a version > 0.11.x?

	# ~/.bashrc: executed by bash(1) for non-login shells.

	# If file exists (likely) copy fragment below into existing script:

	# If stdin is a terminal
	if [ -t 0 ]; then
	# Set GPG_TTY so gpg-agent knows where to prompt. See gpg-agent(1)
	export GPG_TTY="$(tty)"
	# Set PINENTRY_USER_DATA so pinentry-auto knows to present a text UI.
	export PINENTRY_USER_DATA=USE_TTY=1

	{
	config,
	lib,
	pkgs,
	...
	}:
	with lib;
	let
	cfg = config.services.docker-compose;
	settingsFormat = pkgs.formats.yaml {};

	In addition to a significant decrease in hepatic lipid accumulation in the IOE group, which inhibited energy intake by propionate enrichment, hepatic lipids were also significantly reduced in the mice in the IOP group, which was largely enriched with butyrate. Compared with the IOE group, IOP had a stronger regulatory effect on hepatic metabolism and triglyceride metabolism and higher levels of TCA cycle in the host. In addition, butyrate has the ability to promote browning of white adipose tissue (WAT) to brown adipose tissue (BAT).^[@ref39],[@ref40]^ WAT stores energy, whereas BAT uses energy for heating and consequently host energy expenditure increases.^[@ref41],[@ref42]^ However, adipose tissue weight does not change after WAT browning.^[@ref43]^ Therefore, the weight of adipose tissue of mice in the IOP group dominated by butyrate was greater than that of the mice in the IOE group dominated by propionate.

	In conclusion ([Figure [7](#fig7){ref-type="fig"}](#fig7){ref-type="fig"}C), the improvement of ob