travisdowns

The counters that are the easiest to understand and the best for making ratios that are internally consistent (i.e., always fall in the range 0.0 to 1.0) are the mem_load_retired events, e.g., mem_load_retired.l1_hit and mem_load_retired.l1_miss.

These count at the instruction level, i.e., the universe of retired instructions. For example, could make a reasonable hit ratio from mem_load_retired.l1_hit / mem_inst_retired.all_loads and it will be sane (never indicate a hit rate more than 100%, for example).

That one isn't perfect though, in that it may not reflect the true costs of cache misses and the behavior of the program for at least the following reasons:

• It appplies only to loads and can't catch misses imposed by stores (AFAICT there is no event that counts store misses).
• It only counts loads that retire - a lot of the load activity in your process may be due to loads on a speculative path that never retire. Loads on a speculative path may bring in data that is never used, causing misses and d

koron

Where: %LOCALAPPDATA%\Packages\Microsoft.WindowsTerminal_8wekyb3d8bbwe\LocalState\settings.json

cd .config.\WindowsTerminal
mklink settings.json %LOCALAPPDATA%\Packages\Microsoft.WindowsTerminal_8wekyb3d8bbwe\LocalState\settings.json

for preview version: %LOCALAPPDATA%\Packages\Microsoft.WindowsTerminalPreview_8wekyb3d8bbwe\LocalState\settings.json

nrinaudo

Introduction

I was recently asked to explain why I felt disappointed by Haskell, as a language. And, well. Crucified for crucified, I might as well criticise Haskell publicly.

First though, I need to make it explicit that I claim no particular skill with the language - I will in fact vehemently (and convincingly!) argue that I'm a terrible Haskell programmer. And what I'm about to explain is not meant as The Truth, but my current understanding, potentially flawed, incomplete, or flat out incorrect. I welcome any attempt at proving me wrong, because when I dislike something that so many clever people worship, it's usually because I missed an important detail.

Another important point is that this is not meant to convey the idea that Haskell is a bad language. I do feel, however, that the vocal, and sometimes aggressive, reverence in which it's held might lead people to have unreasonable expectations. It certainly was my case, and the reason I'm writing this.

Type classes

I love the concept of type class

paniq

Twisting Pool Queue

by Leonard Ritter [email protected], 2019-05-12

An implementation written in Scopes can be found here

We have the task of distributing IDs to objects in a pool that we can use to look up their contents. We want to ensure that:

• Insert, access, and remove are operations with O(1) complexity.
• The object array is compact, i.e. without any gaps, so we can parallelize work on it with full occupancy.

ggoboogy

import logging
import colorlog

class StreamLogFormatter(logging.Formatter):
    def __init__(self):
        self.BASE = ("%(black)s%(bold)s%(asctime)s%(reset)s "
                "%(log_color)s%(levelname)s%(reset)s")
        self.DIR_NAME = "%(bold)s%(dir_name)s%(reset)s"
        self.MSG = "%(log_color)s%(message)s%(reset)s"

ggoboogy

# influxDB installation
curl -sL https://repos.influxdata.com/influxdb.key | sudo apt-key add - 
source /etc/lsb-release
echo "deb https://repos.influxdata.com/${DISTRIB_ID,,} ${DISTRIB_CODENAME} stable" | sudo tee /etc/apt/sources.list.d/influxdb.list
sudo apt-get update && sudo apt-get install influxdb
sudo service influxdb start

# grafana installation
wget https://s3-us-west-2.amazonaws.com/grafana-releases/release/grafana_5.4.3_amd64.deb /home/ubuntu/
sudo apt-get install -y adduser libfontconfig

andrewrk

//
// Author:   Jonathan Blow
// Version:  1
// Date:     31 August, 2018
//
// This code is released under the MIT license, which you can find at
//
//          https://opensource.org/licenses/MIT
//
//

tylerapplebaum

<#
.SYNOPSIS
An MTR clone for PowerShell.
Written by Tyler Applebaum.
Version 2.1

.LINK
https://gist.github.com/tylerapplebaum/dc527a3bd875f11871e2
http://www.team-cymru.org/IP-ASN-mapping.html#dns

cdown

pacman -S wget # needed for debootstrap

curl -o /tmp/db.deb http://ftp.debian.org/debian/pool/main/d/debootstrap/debootstrap_1.0.60~bpo70+1_all.deb
mkdir /opt/debootstrap
cd /opt/debootstrap
ar x /tmp/db.deb
tar xf data.tar.gz

mkdir /opt/debian

rygorous

#include <immintrin.h>
#include <intrin.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

union Mat44 {
    float m[4][4];
    __m128 row[4];
};