Evgeny Roskach genyrosk

Memory profiling Rust code with heaptrack in 2019

I recently ran into a classic case of "our code is using way more memory than it should". So I took my first dive into memory profiling Rust code. I read several posts about this, including the following

REISUB

If a Linux machine locks up or freezes completely, use REISUB to restart it more gently than pushing the Power Button.

Hold down Alt and the SysReq (Print Screen) keys, and then type R E I S U B, with 2-3 second delays between the key presses to give the commands a better chance to complete.

R: Switch the keyboard from raw mode to XLATE mode
E: Send the SIGTERM signal to all processes except init
I: Send the SIGKILL signal to all processes except init
S: Sync all mounted filesystems

	#!/usr/bin/env bash

	#
	# Load / Unset env vars from file
	#
	function get_env_file() {
	local env=$1
	local envfile=$([ -z "$env" ] && echo ".env" \|\| echo ".env.${env}")
	echo $envfile
	}

	# put into .aws/cli/alias

	[toplevel]

	get-secret =
	!f() {
	default_region=$(aws configure get region)
	printf "Enter the ARN of the secret: "
	read secret_arn
	secret_arn=$(echo $secret_arn \| xargs)

	[alias]
	lg1 = log --graph --abbrev-commit --decorate --format=format:'%C(bold blue)%h%C(reset) - %C(bold green)(%ar)%C(reset) %C(white)%s%C(reset) %C(dim white)- %an%C(reset)%C(bold yellow)%d%C(reset)' --all
	lg2 = log --graph --abbrev-commit --decorate --format=format:'%C(bold blue)%h%C(reset) - %C(bold cyan)%aD%C(reset) %C(bold green)(%ar)%C(reset)%C(bold yellow)%d%C(reset)%n'' %C(white)%s%C(reset) %C(dim white)- %an%C(reset)' --all
	lg = !"git lg2"

	[user]
	email = youremail@gmail.com
	name = username
	signingKey =

	# add this to ~/.bashrc or ~/.bash_profile
	#
	# A simple and useful prompt for bash
	# when zsh is not an option.
	#
	# - displays current directory
	# - shows local git branch
	# - prompt on new line
	# - skips to new line after each command
	#

	SHELL:=/bin/bash
	PROJECT=project
	VERSION=3.7.4
	VENV=${PROJECT}-${VERSION}
	VENV_DIR=$(shell pyenv root)/versions/${VENV}
	PYTHON=${VENV_DIR}/bin/python
	JUPYTER_ENV_NAME=${VENV}
	JUPYTER_PORT=8888

	## Make sure you have `pyenv` and `pyenv-virtualenv` installed beforehand

	SHELL:=/bin/bash
	VIRTUAL_ENV=env
	JUPYTER_ENV_NAME=env
	PORT=8888
	PYTHON=${VIRTUAL_ENV}/bin/python3

	# .ONESHELL:
	DEFAULT_GOAL: help
	.PHONY: help run clean build venv ipykernel update jupyter