have a Concurrency TS? • Why do we need a new one? • implementation status 2.TS2 Hazard Pointer • how I learn to love C++ tricks 3.TS2 RCU • From C to C++ in 2500 days 3 3 © 2021. 4 Concurrency TS1: TS1: Don’t we already have a TS? • Produced in 2015 • Produced by the Concurrency Study Group (SG1) with input from LEWG, LWG • Separate document and is not part of ISO C++ Standard • Goal: Eventual Inclusion https://github.com/cplusplus/concurrency-ts 4 © 2021. 5 What was in Concurrency TS1? • Improvements to std::future • Latches and Barriers • Atomic smart pointers 5 © 2021. 6 Since Concurrency TS1? • Improvements

Generate a single tumor (A single step of evolution) • Generate multiple tumors (Tasked Based Concurrency) • Obtain statistical properties of the tumors (Parallel STL algorithms) • Eigen (Array Class) algorithms. • Modern C++: • : Pseudo-random number generation • : Task-Based Concurrency • : Parallel versions of certain STL algorithms 2Cancer and early detection • Cancer Select an integer according to the probabilities 10 = 2 x 4 + 2 10 == weights(2,2)Task-based concurrency 13 • Each tumor is a parallel task: std::vector> • For each

5G specific tags ● Optimize HTTP/2 stream and connection settings ● Configure sidecar proxy concurrency Tuning Istio to Meet 5G Requirements 13 ©2021 Aspen Mesh. All rights reserved. ● Istio architectural TTLs ● RSA to ECC migration ● Missing www-authenticate header ● Tuning per-workload proxy concurrency ● Consuming Istio generated certificates at gateways Learnings Along the Way 14 ©2021 Aspen

Data in Cassandra 55 About Writes in Cassandra 55 About Compaction 55 About Transactions and Concurrency Control 55 About Inserts and Updates 56 About Deletes 56 About Hinted Handoff Writes 57 About concurrently, the most recent update is the one that will eventually persist. See About Transactions and Concurrency Control for more information about how Cassandra handles conflict resolution. About Special Columns See Tuning Compaction for a description of these compaction strategies. About Transactions and Concurrency Control Unlike relational databases, Cassandra does not offer fully ACID-compliant transactions

(CPU, memory, etc.) ○ Secondary Goal ■ Fine-tune configuration params - debounce interval, push concurrency, etc. #IstioCon Control-plane Scale Testing: Setup ● Setup ○ Create Gateway Pods & thousands

downstream and upstream need to be trusted ■ Stability (quite a few issues/broken functionalities) ● Concurrency limitations ■ Lack of docs etc. #IstioCon VM High Performance Networking ● VM  Host IO interface

• Zero copy buffers – Simplified IO path for erasure coding • OM - operations per second – Concurrency improvements – Caching background updates – Reducing latency per operation • Impala improvements

functionality (#7204) (d1ecb6359) – Mark Walker Run workflows in concurrency groups (#7211) (04e843337) – Mark Walker Added concurrency option to github workflows (#7205) (546b36827) – Mark Walker Add (bdb50b650) – Adrien Delhorme Toolbar bug in 3.10 (#7232) (b12d07989) – Mark Walker Disable workflow concurrency to bring stability back to the CI (#7209) (fdad05756) – Mark Walker How to upgrade to 3.11.0 We