Cheshire Catorpilor

Overly aggressive CFS

We're looking at CPU bandwidth control via CFS:

https://www.kernel.org/doc/Documentation/scheduler/sched-bwc.txt

Reproduction program

Program does number of iterations, in each iteration we burn CPU in small chunks until we get 5ms of real time spent. On each iteration we also print how much

Keybase proof

I hereby claim:

I am catorpilor on github.
I am chesh (https://keybase.io/chesh) on keybase.
I have a public key ASAhPV98Ioje1It3Sf76IndiXikf-viqwkrgNPcYnXzdBwo

To claim this, I am signing this object:

Keybase proof

I hereby claim:

I am catorpilor on github.
I am chesh (https://keybase.io/chesh) on keybase.
I have a public key ASAhPV98Ioje1It3Sf76IndiXikf-viqwkrgNPcYnXzdBwo

Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

Stores data elements based on an sequential, most commonly 0 based, index.
Based on tuples from set theory.

	FILENAME=$(basename $(pwd))
	go test -run=. -bench=. -cpuprofile=cpu.out -benchmem -memprofile=mem.out -trace trace.out
	go tool pprof -pdf $FILENAME.test cpu.out > cpu.pdf && open cpu.pdf
	go tool pprof -pdf --alloc_space $FILENAME.test mem.out > alloc_space.pdf && open alloc_space.pdf
	go tool pprof -pdf --alloc_objects $FILENAME.test mem.out > alloc_objects.pdf && open alloc_objects.pdf
	go tool pprof -pdf --inuse_space $FILENAME.test mem.out > inuse_space.pdf && open inuse_space.pdf
	go tool pprof -pdf --inuse_objects $FILENAME.test mem.out > inuse_objects.pdf && open inuse_objects.pdf
	go tool trace trace.out

	go-torch $FILENAME.test cpu.out -f ${FILENAME}_cpu.svg && open ${FILENAME}_cpu.svg

	package main

	import (
	"bufio"
	"fmt"
	"io"
	"os"
	"strconv"
	"time"
	)

	// getComponent is a function that returns a promise for a component
	// It will not be called until the first mount
	function asyncComponent(getComponent) {
	return class AsyncComponent extends React.Component {
	static Component = null;
	state = { Component: AsyncComponent.Component };

	componentWillMount() {
	if (!this.state.Component) {
	getComponent().then(Component => {

	FROM golang:alpine AS build

	ADD . /go/src/github.com/my/project

	WORKDIR /go/src/github.com/my/project

	RUN go build -o /mybinary ./cmd/mybinary

	FROM alpine:latest