development cycles. ● Large, complex codebases.But the structure of a game is *roughly the same*Renderer Start End Gameplay Audio Initialization I/O AI Physics Rendering AudioStart End Initialization registry acts as a place to store, manage and manipulate those resources. Resource Registry Renderer Physics System AI Audio compressed_textures collision_boxes behavior_trees audioResource Physics ● Gameplay specific We’ve simulated everything and all that’s left is to send them to the renderer.Player Rocks Foliage NPCs Line of sightWe can’t send everything to the GPU. The Problem ●

introduction about my background, I am a real-time rendering engineer at NVIDIA working on the RTX renderer in Omniverse. Before that, I was rendering engineer intern on the rendering team of Unreal Engine is implemented is generally break the whole execution into several parts, and compose the whole process as an state machine and use coroutine frame to maintain the necessary intermediate states. 2425 } frame->seq_for.await_resume(); And, this is our ApplyImmunization. We’ve walk through the process. We will get the token, and initial suspend 9091 token<> awaitable awaitable::await_suspend

process_file(...) pool.run() _clone … … process_file(...) pool.run() _clone … … process_file(...) pool.run() _clone … … Stack Traces for Async Code are Unhelpful Unhelpful Threadpool threads: #0 process_file(...) #5 pool.run() #10 __clone … … IO Thread: #0 async_read_some_at(...) #3 ctx.run() #5 __clone … … Main thread: main() #7 __libc_start_main() … …What would be better? Threadpool threads: #0 process_file(...) #5 pool.run() #10 … IO Thread: … #0 async_read_some_at(...) #3

code modification • APIsCode Generation Outline Source Code Executable Debug Info Running Process Measurement Code • Debug Info Analysis • Type/Layout Reconstruction • Code Generation • Transformation: Inline Inheritance ReconstructedOutline Source Code Executable Debug Info Running Process • Debug Info Analysis • Type/Layout Reconstruction • Code Generation • Object Introspection CodeGen: containersType Reconstruction Outline Source Code Executable Debug Info Running Process • Debug Info Analysis • Type/Layout Reconstruction • Code Generation • Object Introspection

num_values, MPI_FLOAT, 0, 0, MPI_COMM_WORLD); // Data is now in // `recv_values` Process 0 Process 1How do I program one? - Message Passing - processes issue matching send and receive calls num_values, MPI_FLOAT, 0, 0, MPI_COMM_WORLD); // Data is now in // `recv_values` Process 0 Process 1How do I program one? - Message Passing - processes issue matching send and receive calls num_values, MPI_FLOAT, 0, 0, MPI_COMM_WORLD); // Data is now in // `recv_values` Process 0 Process 1 P0 and P1 must both participate in message.How do I program one? - Message Passing - processes

SSC extern "C" Plugins User provides functionality: ▶ Calls the main loop ▶ Provides call for process data handling ▶ Provides calls for interrupt control ▶ Calls interface on interrupts ▶ Hardware concrete loop processing for SSC void MainLoop(void); Called from SSC when cyclic data is available. void process_cycle(TOBJ7000 *pdo_in, TOBJ6000 *pdo_out); ciere.com Beckhoff SSC extern "C" Outline Beckhoff with const See Jason’s C++ Weekly Episode 283 Main loops all the way down extern "C" { void process_app(TOBJ7000 *pdo_in, TOBJ6000 *pdo_out) { // UGLY THINGS WE DON'T PUT ON SLIDES } } extern "C" {

right time.Missed deadlines Real-time programmingReal-time code in C++ Real-time programmingvoid process (float * audio) { // You have 11.6 ms from now, GO!!!! ... }void dispatch (Data& audio) ... } 🚨void dispatch() { x = make_unique(); ... } 🚨Sometimes it’s hiddenvoid process_audio() { numbers_[1] = 2; ... } 🤔void dispatch() { auto const x = input_array(); post_report([x, y](auto & data) { data.input = x; data.output = y; }); } 🤔void process_audio() { fftw_execute(plan); ... } 🤔How can we be confident that our code is real-time

game environments with many players, a single process cannot handle everything. The game world is divided into smaller areas, each managed by its own process. As players move, data must migrate between What is serialization and deserialization? • In computing, serialization (or serialisation) is the process of translating a data structure or object state into a format that can be stored (e.g. files in What is serialization and deserialization? • In computing, serialization (or serialisation) is the process of translating a data structure or object state into a format that can be stored (e.g. files in

- CppCon 2024Hello My name is Dominik Grabiec This talk is