Code, Exercise and Programming - Technology Performance Pulse

Basis Path Testing in Software Testing

Testlodge

AUGUST 9, 2023

The tester established a baseline by selecting the most critical, common, or obvious path through the code selection. Steps to Performing Basis Path Testing The first step is to create a control flow graph for a specified code section. The second step is to select a baseline path through the code.

Testing

Testing Software Software C++

Missing Library: A pg_upgrade History

Percona

DECEMBER 29, 2022

In this blog post, I will show you a particular example I faced when working with an upgrade exercise using pg_upgrade. When working with the upgrade exercise, the goal was to move from PostgreSQL 11 to PostgreSQL 12. 1 amd64 front-end programs for PostgreSQL 11 ii postgresql-client-12 12.13-1.pgdg20.04+1

C++

C++ Open Source Database Programming

Your First C Program

Sutter's Mill

OCTOBER 16, 2011

As a tribute in honor of Dennis Ritchie’s passing , I’d like to invite you to share your thoughts in this post’s comments about your first C program – either the code if you remember it approximately, or a story about when you wrote it. After all, this was just a warm-up initial exercise for the course. Here’s mine.

C++

C++ Programming Code Development

cppfront: Spring update

Sutter's Mill

MAY 1, 2023

Simple, mathematically safe, and efficient chained comparisons ( commit ) P0515 “Consistent comparison” (aka “spaceship”) was the first feature derived from this Cpp2 work to be adopted into the ISO Standard for C++, in C++20. Thank you again to everyone who helped land this Cpp2 feature in the ISO C++ Standard.

C++

C++ Virtualization Lambda Code

GotW #102 Solution: Assertions and “UB” (Difficulty: 7/10)

Sutter's Mill

JUNE 3, 2021

Briefly, what is the difference among: (a) undefined behavior Undefined behavior is what happens when your program tries to do something whose meaning is not defined at all in the C++ standard language or library (illegal code and/or data).

C++

C++ Programming Lambda Code

GotW #97 Solution: Assertions (Difficulty: 4/10)

Sutter's Mill

JANUARY 11, 2021

Assertions have been a foundational tool for writing understandable computer code since we could write computer code… far older than C’s assert() macro, they go back to at least John von Neumann and Herman Goldstine (1947) and Alan Turing (1949). Assertions are only about finding bugs, not doing program work.

C++

C++ Programming Code Testing

Advent Calendars For Web Designers And Developers (December 2021 Edition)

Smashing Magazine

DECEMBER 2, 2021

JVM Programming Advent Calendar. Advent of Code. If you prefer a puzzle over an article, take a look at Advent of Code. Created by Eric Wastl, this is an advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like.

Design

Design Development Programming Website

GotW #98 Solution: Assertion levels (Difficulty: 5/10)

Sutter's Mill

JANUARY 25, 2021

We want a way to enable checking for some assertions but not others in the same code, because we may not always be able to afford expensive checks. In GotW #97 question 3, part of the solution says that “if an assertion fails” then… … there is a program bug, possibly in the assertion itself. in production).

C++

C++ Programming Cache Testing

BPF Theremin, Tetris, and Typewriters

Brendan Gregg

DECEMBER 21, 2019

In the video I explained how I arrived at tracing __iwl_dbg() in this way, and how you can follow a similar approach for tracing unfamiliar code. This is not my best code, since I hacked it in a hurry, but here it is: #!/usr/bin/python Embedded C. # # Tone generation from: [link] # # 29-Apr-2019 Brendan Gregg Created this.

C++

C++ Education Java AWS

BPF Theremin, Tetris, and Typewriters

Brendan Gregg

DECEMBER 21, 2019

In the video I explained how I arrived at tracing __iwl_dbg() in this way, and how you can follow a similar approach for tracing unfamiliar code. This is not my best code, since I hacked it in a hurry, but here it is: #!/usr/bin/python Embedded C. # # Tone generation from: [link] # # 29-Apr-2019 Brendan Gregg Created this.

C++

C++ Education Java AWS

Move, simply

Sutter's Mill

FEBRUARY 17, 2020

C++ “move” semantics are simple, and unchanged since C++11. Move: What it is, and how to use it In C++, copying or moving from an object a to an object b sets b to a ’s original value. This post is an attempt to shed light on that situation. That’s it for what advanced users need to know. Yes, but don’t.

C++

C++ Testing Design Strategy

PostgreSQL Parameters: Scope and Priority Users Should Know

Percona

AUGUST 30, 2023

If a PostgreSQL user wants to change these values, they need to recompile the PostgreSQL from the source code. This can be changed later using the pg_checksums utility, but that will be a painful exercise on a big database. psql "host=localhost user=postgres options='-c synchronous_commit=off'" psql (14.8) Type "help" for help.

Database

Database Servers Open Source Tuning

Developing Real-Time Digital Twins for Cloud Deployment

ScaleOut Software

AUGUST 20, 2020

This allows application code to introspect on the dynamic behavior of each data source, maintain synthetic metrics which aid the analysis, and create alerts when conditions require. They make use of standard object-oriented concepts and languages (such as C#, Java, and JavaScript). Debugging with a Mock Environment. Summing Up.

Cloud

Cloud Development Analytics Azure

Developing Real-Time Digital Twins for Cloud Deployment

ScaleOut Software

AUGUST 20, 2020

This allows application code to introspect on the dynamic behavior of each data source, maintain synthetic metrics which aid the analysis, and create alerts when conditions require. They make use of standard object-oriented concepts and languages (such as C#, Java, and JavaScript). Debugging with a Mock Environment. Summing Up.

Cloud

Cloud Development Analytics Azure

Let's Write Some x86-64

Nick Desaulniers

APRIL 18, 2014

“It’s written in ones and zeroes - binary code. At the lowest level, all computers are programmed with strings of ones and zeroes. When you program in machine language, you are controlling the computer at its brainstem, the root of its existence. For example in the code: 1. . “Is this another analogy?”

C++

C++ Programming Code Virtualization

GotW #101 Solution: Preconditions, Part 2 (Difficulty: 7/10)

Sutter's Mill

MARCH 25, 2021

Some of these are exercised by the “wrong order” permutations above, but even call sites that remember the right argument order can make mistakes about the actual values. But is (b) always better than (c), in other examples? We limit the code that is responsible for maintaining the boolean condition. is_reachable?

C++

C++ Design Code Systems

A persistent problem: managing pointers in NVM

The Morning Paper

DECEMBER 8, 2019

On the last morning of the conference Daniel Bittman presented some of the work being done in the context of the Twizzler OS project to explore new programming models for NVM. The starting point is a set of three asumptions for an NVM-based programming model: Compared to traditional persistent media, NVM is fast. What about security?

Hardware

Hardware Programming Media Storage

A peculiar throughput limitation on Intel’s Xeon Phi x200 (Knights Landing)

John McCalpin

JANUARY 22, 2018

Introduction: In December 2017, my colleague Damon McDougall (now at AMD) asked for help in porting the fused multiply-add example code from a Colfax report ( [link] ) to the Xeon Phi x200 (Knights Landing) processors here at TACC. Instead, we found puzzle after puzzle. Instead, we found puzzle after puzzle.

Latency

Latency Hardware Code Testing

Technology Performance Pulse

Basis Path Testing in Software Testing

Missing Library: A pg_upgrade History

Trending Sources

Your First C Program

cppfront: Spring update

GotW #102 Solution: Assertions and “UB” (Difficulty: 7/10)

GotW #97 Solution: Assertions (Difficulty: 4/10)

Advent Calendars For Web Designers And Developers (December 2021 Edition)

GotW #98 Solution: Assertion levels (Difficulty: 5/10)

BPF Theremin, Tetris, and Typewriters

BPF Theremin, Tetris, and Typewriters

Move, simply

PostgreSQL Parameters: Scope and Priority Users Should Know

Developing Real-Time Digital Twins for Cloud Deployment

Developing Real-Time Digital Twins for Cloud Deployment

Let's Write Some x86-64

GotW #101 Solution: Preconditions, Part 2 (Difficulty: 7/10)

A persistent problem: managing pointers in NVM

A peculiar throughput limitation on Intel’s Xeon Phi x200 (Knights Landing)

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