## +23 ## I s std::mdspan a Zero-overhead Abstraction? ## OLEKSANDR BACHERIKOV ## I s std::mdspan a Zero-overhead Abstraction? Oleksandr Bacherikov Snap Inc ## What is std::mdspan? It's a view

## +21 ## PGAS in C++: A Portable Abstraction for Distributed Data Structures ## BENJAMIN BROCK 20 21 October 24-29 ## About Me - PhD candidate at Berkeley - Advised by Kathy Yelick and Aydın Buluç 64>>(cuda::dmatrix_view(a)); ## Wrap-Up - Remote pointer types are a useful abstraction for implementing distributed data structures - Extendable to multi-GPU data structures both intra-node

## Building resilient systems inside the mesh: abstraction and automation of Virtual Service generation Vladimir Georgiev, Thought Machine ## I stioCon ## Sync calls failures inside the mesh - Everyone manage Virtual Service configs. - Virtual Service configs become a release artifact. - Easy abstraction for defining timeouts and retries in a language agnostic way. - Application developers using Istio/Envoy

designed to be complete. The whole point of the STL is that decoupling containers (with the iterator abstraction) allows us to write generic algorithms that work on all containers. So let's write some! ##

/p7_1.jpg) ## Robot Behaviors This Coordinator or Task Planner is also the highest level of abstraction of our system, where we focus on WHAT the robot does (or should do) and not on HOW it does it (Skills Trees (and State Machines, to be fair) is that: 1. They allow us to reason at a higher level of abstraction. 2. It allows people that are not domain experts or C++ developers to design or understand the

adoptable 100% binary compatibility always 100% source compatibility always available, but “zero-overhead” (only pay for it if you use it) Make it easy to do what we already teach Defaults are what we and as P2392 CppCon 2021 Simplicity (goal: 10 less to know) Context-free, order independent “Zero-overhead” backward compatibility Declarative parameter passing, multiple/named return values Unified safe are not always in tension Judicious abstraction  directly express intent 11 Simplicity Efficiency Safety These are not always in tension Judicious abstraction  directly express intent 12 Simplicity

from workers ## No zero-overhead solution • Error handling requires communication • Communication is expensive • Making C++ “do it for you” won’t be free • If you want a zero-overhead solution, ... • other non-reduction algorithms ## • Use if you don’t want to pay for reduction – Not a zero-overhead abstraction if errors are rare – Atomic updates may hinder compiler optimizations — But that only

Zero Overhead Abstraction for Safety ### cppreference.com |Page|Discussion| |---|---| |C++|C++ language| Create account Standard revision ## Zero-overhead principle The zero-overhead principle is

Exception Handling and Exception Safety Video Sponsorship Provided By: ansatz CC ☀️ ☐ ☐ ☐ ☐ # Zero-overhead deterministic exceptions: Throwing values Document Number: P0709 R4 Date: 2019-08-04 Reply-to: "C++" projects commonly ban exceptions, because today's dynamic exception types violate the zero-overhead principle, and do not have statically boundable space and time costs. In particular, throw requires Exceptions rely on dynamic memory Exceptions make the binary size grow (not zero overhead) # Zero-overhead deterministic exceptions: Throwing values Document Number: P0709 R4 Date: 2019-08-04 Reply-to:

again in 2018. • The exception mechanism was addressed by Herb Sutter (Chair) in 2019: P0709: Zero-overhead deterministic exceptions: Throwing values - The exception mechanism was debated in Prague (last Subroutine if (fail) { throw; } ## PART IV: ALTERNATIVES Herb Sutter's P0709R4: Zero-overhead deterministic exceptions: Throwing values From the Abstract (partial quote): (4.1) Today's