cirocosta

package main

import (
	"context"
	"fmt"
	"time"
)

func sleepHalfTheTime(ctx context.Context, total time.Duration) {
	time.Sleep(total >> 1)

cirocosta

#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

void handle_sig(int sig) {}

void wait_a_bit() {
        if (signal(SIGINT, handle_sig) == SIG_ERR) {
                perror("signal");

cirocosta

1. compile it
  gcc -O2 -static -o sample ./madvise-sample.c
    
2. run it in a terminal that has the current proc in a cgroup
  mkdir /sys/fs/cgroup/memory/test
  echo $$ > /sys/fs/cgroup/memory/test/cgroup.procs
  ./sample
  
3. in another terminal, observe `memory.stat` for that cgroup
  cat /sys/fs/cgroup/memory/test/memory.stat

cirocosta

#!/usr/bin/python

# hello-sync.py  Detect quick uses of `sync`
#
# The program detects when two `sync()` calls get issued within a 1s delta.
#
# For instance, `sync; sleep 2; sync` will count `quick` as 0, but `sync;sync;sync`
# will.
#
# Example output:

cirocosta

     about: — The same page as "Help -> About" (except that, on some applications, Help → About is a much smaller popup).
    about:about — Lists all these about: URLs (Mozilla Suite/SeaMonkey or Firefox 4 and newer only).
    about:accounts — Firefox Sync account. New on Firefox 29. [1][2]
    about:addons — The "new" addons manager, in trunk builds dated 2010-05-11 or later.
    about:app-manager — new on Firefox 26. App Manager, a tool to help users build and install web apps on compatible devices (i.e. Firefox OS).
    about:buildconfig — Reveals details about your Mozilla build options.
    about:cache — Displays cache statistics and disk cache directory location.
        about:cache?device=memory — Lists memory cache entries.
        about:cache?device=disk — Lists disk cache entries. 
    about:cache-entry — Shows information about a cache entry. Used in about:cache links. Requires parameters.

cirocosta

package main_test

import (
	"time"
	"testing"
)

type TimeNowChecker struct {
	lastTime time.Time
	interval time.Duration

cirocosta

#!/bin/bash

set -o errexit
set -o xtrace

readonly dir=/Users/cirocosta/cirocosta/blog/content/notes


main() {
        case $1 in

cirocosta

version: '3'

services:
  db:
    image: postgres
    ports:
    - 6543:5432
    environment:
      POSTGRES_DB: concourse
      POSTGRES_USER: dev

cirocosta

FROM golang AS base

	RUN apt update && \
		apt install -y \
			git gcc libseccomp-dev
	
	ENV \
		CC=gcc \
		CGO_ENABLED=1

cirocosta

Running in parallel across 6 nodes

• [SLOW TEST:57.335 seconds]
Main team role config
/Users/cirocosta/workspace/concourse/topgun/k8s/mainteam_role_test.go:11
  Adding team role config yaml to web
  /Users/cirocosta/workspace/concourse/topgun/k8s/mainteam_role_test.go:45
    returns the correct user role
    /Users/cirocosta/workspace/concourse/topgun/k8s/mainteam_role_test.go:74
------------------------------