## +24 ## Multi Producer, Multi Consumer, Lock Free, Atomic Queue User API and Implementation ... ## EREZ STRAUSS ## Lockfree, MPMC Queue - Legal All Statements and representations are my own and do good average - Worst case scenario, as close as possible to average • Multi producers threads - on multiple cpu-cores • Multi consumers threads - on multiple cpu-cores C++17 - no need to support C++14 between publishers and consumers • bounded - no memory allocation, other than init time • Multi producer, multi consumer • Limited data size - up 12 bytes • Ownership transfer using unique_ptr wrapper

### Go 1.4 runtime Gopher China 2015 1. Memory Allocator 2. Garbage Collector 3. Goroutine Scheduler  ### 1. Memory Allocator

Rust 异步 Runtime 的兼容层 施继成 @ DatenLord ## [Table_CompanyName] 6.17-6.18 @Shanghai ## Table of Contents ## # Rust async runtime Introduce what's rust async runtime 2 ## #Async runtime binding Analyze the reason of runtime isolation 3 ## # Compatible layer Create a wheel used everywhere ## 1 # Rust async runtime ## Rust async runtime ![Image](/uploads/documents/d/6/e/3/d6e343b36a54b928 the I/O? ## Rust async runtime ## Runtime responsibilities • Invoke waiting tasks and halt tasks • Get notifications from the OS • Schedule tasks across threads if it's multi-thread model ## 😄 ##

## Designing an ultra low-overhead multithreading runtime for Nim Mamy Ratsimbazafy mamy@numforge.co ## Hello! ## I am Mamy Ratsimbazafy During the day blockchain/Ethereum 2 developer (in Nim) During multithreading: definitions and use-cases Parallel APIs Sources of overhead and runtime design Minimum viable runtime plan in a weekend ## Understanding the design space Concurrency vs parallelism, hardware threads The same distinctions can be done at a multithreaded language or multithreading runtime level. ## The problem ## How to schedule M tasks on N hardware threads? ## Latency vs Throughput

# Kubernetes VM Solutions for Multi-Tenant Applications Guangxu Li, Senior Software Engineer, ZTE li.guangxu@zte.com.cn ## Container and VM Ecosystem ## Container VM Kubernetes Docker Swarm Marathon vm (traditional vm app) Kata Container Focus : container security ## V irtlet is a Kubernetes runtime server which allows you to run VM workloads, based on QCOW2 images ## V irtlet compares with other commands)  docker (runtime) Cluster components KubeVirt component Kubernetes component ## KubeVirt Application Layout ##

## Go runtime related problems in TiDB production environment ## About me Arthur Mao(毛康力), Senior Engineer@PingCAP • TiDB core developer (top3 contributor) • GitBook about golang internals (@tiancaiamao) ready => goroutine wake up == 4.3ms ☐ Sometime even 10ms+ latency here! ☐ The time spend on runtime schedule is not negligible - When CPU is overload, which goroutine should be given priority? ## client lib ## Conclusion - Under heavy workload, goroutines get longer to be scheduled - The runtime scheduling does not consider priority • CPU dense workload could affect IO latency ## Part II -

## Scaling a Multi-Tenant k8s Cluster in a Telco Pablo Moncada eBPF Summit October 28, 2020 ## About MasMovil group • 4th telecom company in Spain - Provides voice and broadband services to +12M customers operational complexity  ## Multi-tenancy caveats - Single underlying infrastructure - Reduce operational complexity - Infrastructure

of FlatMap or HashMap depends ## HashMap Faster O(1) lookup Higher per-cell cost - memory or runtime - depends on hashmap design ## FlatMap Slower O(logn) lookup No per-cell overhead Easier to gather contains given 3d coordinates Normalises 3d coordinates into indexes Combine indexes into one - like multi-dimensional array index ## CELL BOUNDS FROM INDEX struct GridDimensions { uint32_t cell_count; Negatively impacts compile performance - each file parses & evaluates tuple templates Also impacts runtime performance - in debug mostly - also in release ▶ Easiest fix - expand code manually Fixes compile

ments/b/0/b/9/b0b93d23684d3dbee9db7c3c447ce82a/p2_1.jpg) • Service Mesh 回顾 • Multi Runtime: 从 sidecar 到机甲 • Runtime API: 解决跨云部署和厂商绑定难题 • WebAssembly in sidecar: 让业务逻辑跑在sidecar里 • 展望2022：待解决的问题 • 2：异构语言接入成本高  ## Multi-Runtime  图片来源： https://www com/articles/multi-runtime-microservice-architecture/  Reference: https://www.infoq.com/articles/multi-runtime-microservice-architecture/

## Nim - the first high performance language with full support for hot codereloading at runtime by Viktor Kirilov ## Me, myself and I • my name is Viktor Kirilov - from Bulgaria • creator of doctest raises an `FieldError` exception, because # n.kind's value does not fit: n.strVal = "" ## Multi methods type Thing = ref object of RootObj Unit = ref object of Thing x: int method collide(a currency? • coroutines & closures • switch & pattern matching • dynamic dispatch & multi-methods - converters - explicit (for implicit conversions) • effect system (transitive) • extensible