CPPCON 2020 / CPPCON 2020 / MACRO-FREE TESTING MACRO-FREE TESTING WITH C++20 WITH C++20 | | | | HTTPS://BOOST-EXT.GITHUB.IO/UT/CPPCON-2020 HTTPS://BOOST-EXT.GITHUB.IO/UT/CPPCON-2020 KRIS@JUSIAK SINGLE (2K LOC) WITH NO EXTERNAL DEPENDENCIES (2K LOC) WITH NO EXTERNAL DEPENDENCIES MACRO-FREE (✔ ) MACRO-FREE (✔ ) (*) LIMITATIONS MAY APPLY (*) LIMITATIONS MAY APPLY HTTPS://GITHUB.COM/BOOST-EXT/UT SINGLE (2K LOC) WITH NO EXTERNAL DEPENDENCIES (2K LOC) WITH NO EXTERNAL DEPENDENCIES MACRO-FREE (✔ ) MACRO-FREE (✔ ) FEATURES ( FEATURES ( , , , , , , , , , , , , , , ) (*) LIMITATIONS MAY

BeyondWe still need to wait for all the player inputs to process the confirm frame…What is a rollback system?Input predictionMispredictionDoing a rollbackRollback Implementation DetailsPhysics vs Graphics game update. This allows to sequence your game frame.A Fixed TickRollback Manager InputsRollbackGame System Architecture Game systems need a function to rollback (revert to a previous state). Typically everywhere Player Character as a gameplay, physics, graphics and audio object…ECS-like architecture System and array of Components (C-struct without functionality, except operators maybe) You want to have

Hlavacs – Combining Co-Routines and Functions into a Job System - CppCon 2021 1 / 39Helmut Hlavacs – Combining Co-Routines and Functions into a Job System - CppCon 2021 2 / 39 About Myself • Professor for Functions into a Job System - CppCon 2021 3 / 39 Creating Game Engines with C++ • Vienna Game Job System + • Graphics API Abstraction Layer + • Vienna Entity Component System + Vienna Type List Library 2.0 https://github.com/hlavacs 20Helmut Hlavacs – Combining Co-Routines and Functions into a Job System - CppCon 2021 4 / 39 The Game Loop auto prev = high_resolution_clock::now(); while( !finished()

Zhang tankiistanki tankijong COROUTINE JOB SYSTEM WITHOUT STANDARD LIBRARY source code of the system: https://github.com/tankiJong/cpp-coroutine-job-system Hi Everyone, Tanki here. Thanks for coming resources: https://gist.github.com/MattPD/9b55db49537a90545a90447392ad3aeb Before we dive into the system, I want to take 10 mins to have a quick recap about C++ coroutine and share some gotcha moments pretty overwhelmed by all different terms, not to mention to put them up together to form a knowledge system. I hope the following information can be helpful and I attached some links in the slides, or pointers

from Columbia University. Title : Behavior-driven Tests for Microservices-based Algo Trading System Summary : Introduction : This poster will introduce a test framework we use at Bloomberg to to enable behavior-based tests in natural language style for a microservices-based algo trading system that our engineering team is responsible for. Relevance : For our electronic trading business Although microservice components can easily be unit tested, it is often non-trivial to automate the system-level tests with external dependencies. Controlling external dependencies are especially important

Designing a simplified plugin architecture ● Library used in robotics to implement plugin based system ○ Pluginlib ● Case study for plugin architecture - MoveIt ● Limitations ● Summary 2Introduction add functionality to a larger system without having to alter the source code of the system itself. Plug-ins are self-contained modules that are loaded into the system at runtime. 4Components of plugin plugin architecture 1. Core - Defines how the system operates and provides interface 2. Plugins - Stand-alone independent components that contain implementation of core application’s features

use them, be sure to only use them for module source files (as defined above)30/50 What is a build system anyway? $ g++ -o my_src.o -I . -c my_src.cpp $ g++ my_executable .o -o my_executable31/50 Tracking changes for the build system?34/50 What changes for the build system?35/50 What changes for the build system?36/50 What changes for the build system?36/50 What changes for the build system?37/50 What changes changes for the build system? add_executable ( my_executable ) target_sources ( my_executable PUBLIC ${ PROJECT_SOURCE_DIR }/ my_src.cpp PUBLIC FILE_SET MODULES BASE_DIRS ${ PROJECT_SOURCE_DIR } FILES

cblas_sgemm(....); return 0; } High Performance code is about Hardware Matrix Multiply #define macro_n4 {\ b_pref = b_ptr + 4 * K;\ __asm__ __volatile__(\ "movq %7,%%r15; movq %1,%%r14; movq %6,%%r11; "zmm29","zmm30","zmm31");\ ,! a_ptr -= M * K; b_ptr += 4 * K; c_ptr += 4 * ldc - M;\ } #define macro_n2 {\ b_pref = b_ptr + 2 * K;\ __asm__ __volatile__(\ "movq %7,%%r15; movq %1,%%r14; movq %6,%%r11; packing_b_k18(B+k_count+second_n_count*LDB,b_buffer+(second_n_count-n_count)*k_inc,LDB,k_inc,second_n_inc); macro_kernel_k18(a_buffer,b_buffer+(second_n_count-n_count)*k_inc,m_inc,second_n_inc,k_inc,&C(0,second_n_count)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.4 Cross platform, build system agnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.5 Stable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202 12.5 Version Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205 12.6 Custom settings. 4 Chapter 1. Introduction conan Documentation, Release 1.16.1 1.4 Cross platform, build system agnostic Conan works and is being actively used on Windows, Linux (Ubuntu, Debian, RedHat, ArchLinux

build systemsLearning from other build-systemsParallelism How many independent targets can a build system run concurrently at most?Parallelism Level 1 - Gradle . ├── app │ ... │ └── build.gradle ├── robust and easy to configure toolchains out of the box. This way builds do not normally rely on any system-wide installed tools/libraries that can change between different workstationsReproducibility Level add_definitions(-D__DATE__="May 14 2021") add_definitions(-D__TIME__="17:11:43") add_compile_options(-Wno-builtin-macro-redefined)Will it CMake? Problem 3: Randomness when using `-flto` with GCC LTO on GCC will produce