ulidtko

'use strict';
/* Python-like repr() formatter for JS types, with recursion limit. */
/* Adapted from https://gist.github.com/soapie/6407618 */
function repr(x, max, depth) {
	var ELIDED = "[..]";
	if (depth === undefined) depth = 0;
	if (max === undefined) max = 2;
	if (isPrim(x))
		return showPrim(x);
	if (typeof x === 'function')

ulidtko

#!/usr/bin/env python3
"""
https://gist.github.com/ulidtko/fdd7222bd7e85480fa201614fbc42faf
"""

import os
import subprocess
import sys
from time import sleep
from urllib.error import URLError

ulidtko

#!/usr/bin/env python3
import argparse
import datetime
import sys
import os.path

import boto3
import jinja2

ulidtko

Since ~beginning of May 2022, the following symptom appeared.

After roughly a day of uptime, system exhibits pretty heavy lag: ~1s freeze every couple seconds. Input handling pauses (apart from hw cursor); extremely annoying.

That's on linux-lts 5.15.39-1.

Finding 1: dstat --vm shows exorbitant bursts of minor pagefaults (minpf), 61k per second, which correlate perfectly with the lag. Background level is tens to hundreds.

ulidtko

# Oh come on! It's 2020! Stop freezing on OOM, you *clumsy penguin* !

kernel.sysrq = 244
#            =     128+64+32+16  +4
#              256+128+64+32+16+8+4+2+1
#               ^   ^   ^  ^  ^ ^ ^ ^ ^
#               |   |   |  |  | | | | |
#               |   |   |  |  | | | | |  0 - disable every SysRq function.
#               |   |   |  |  | | | | `- 1 - enable every SysRq function.
#               |   |   |  |  | | | `--- 2 - enable control of console logging level

ulidtko

[package]
name = "foobar"
version = "0.1.0"
authors = ["max ulidtko <[email protected]>"]
edition = "2018"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
rand = "0.8.*"

ulidtko

Keybase proof

I hereby claim:

• I am ulidtko on github.
• I am ulidtko (https://keybase.io/ulidtko) on keybase.
• I have a public key ASAr8VkzXINuO7wo76vlXNnbteMe5ZwB9xq-bH4KOtigVQo

To claim this, I am signing this object:

ulidtko

Dummy echo server with TLS in Java.

Usage

git clone https://gist.github.com/ulidtko/f44360b0ac15dd7d42e21de6b964ace5 java-tls-echoserv
cd java-tls-echoserv
javac TlsEchoServer.java
java TlsEchoServer 9011 ./java-pleasure.jks 123456 123456

#-- or, with verbose debug dump of the handshake:

ulidtko

ulidtko

#!/usr/bin/env python3

import argparse
import socket
import struct
from time import sleep

FRAG1 = b"""HTTP/1.0 200 OK\r
Server: netcat\r
Content-Type: text/plain\r