Google™ Go GC: Latency Problem Solved Rick Hudson Google Engineer ## My Codefendants: The Cambridge Runtime Gang   #1 Barrier: GC Latency ## When is the best time to do a GC? When nobody is looking. Using camera to track eye movement jpg) ## Pop up a network wait icon ## Waiting ## Or Trade Throughput for Reduced GC Latency ## Google ## Latency ## Nanosecond 1: Grace Hopper Nanosecond 11.8 inches Microsecond 5.4: Time light travels

### Interesting Upcoming Features from Low Latency, Parallelism and Concurrency From Kona 2023, Tokyo 2024, and St. Louis 2024 PAUL E. MCKENNEY, MAGED MICHAEL & MICHAEL WONG 20 24 September 15

## +24 ## Work Contracts Rethinking Task Based Concurrency and Parallelism for Low Latency C++ MICHAEL A MANISCALCO ### “We cannot solve our problems with the same thinking we used when we created them Michael A Maniscalco ○ Software Architect and Principal Developer at Lime Trading ○ We develop low latency market data and trading software for use in HFT ## • Personal github.com/buildingcpp Work Contracts ea9d54e/p141_1.jpg) Work Contracts Rethinking Task Based Concurrency and Parallelism for Low Latency C++ MICHAEL A MANISCALCO ## Resources: Source Code: github.com/buildingcpp/work_contract ![I

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	TPS	Latency(ms)	CPU
			Consumer	Producer
优化前	81986	1 业务线程 业务线程 业务线程 TPS Latency(ms) CPU Consumer Producer 原始单连接*10 0 码力 | 17 页 | 2.22 MB | 2 年前 3 Performance Matters [Image](/uploads/documents/6/9/a/5/69a5a7f2064c85b44eb3710c323581ae/p159_2.jpg) found 8,000,000 similar images (latency) (thruput) How fast do results come back? ## Progress Points  Luke wants to minimize response time. He adds latency progress points. ## Progress Points Little's Law: We Lear latency = transactions / throughput . We can reduce the model footprint by reducing the number of trainable parameters. the metrics we care about into two categories: footprint metrics such as model size, prediction latency, RAM consumption and the quality metrics, such as accuracy, F1, precision and recall as shown in the model with respect to one or more of the footprint metrics such as the model size, inference latency, or training time required for convergence with a little quality compromise. Hence, it is important 0 码力 | 33 页 | 1.96 MB | 2 年前 3 Leveraging the Power of C++ for Efficient Machine Learning on Embedded Devices devices Alternative to cloud-based machine learning Advantages: ▶ Real-time processing ▶ Low latency ▶ Reduced bandwidth usage ▶ Offline operation ▶ Improved privacy ## ▶ Disadvantages: ▶ Compatibility 0 码力 | 51 页 | 1.78 MB | 1 年前 3 When Nanoseconds Matter: Ultrafast Trading Systems in C++ Options Automated Trading Systems team at Optiver, a global market maker company - Worked on low-latency systems for 15 years in Trading and Defense  Ultra low-latency execution (< 1µs) ## Order book deep dive “The order book is the heart of any trading system 0 码力 | 123 页 | 5.89 MB | 1 年前 3 Observability and Istio Telemetry destServiceInstance = 9; int32 destServiceInstanceId = 10; string endpoint = 11; int32 latency = 12; int32 responseCode = 13; bool status = 14; Protocol protocol = 15; DetectPoint all_p99 = from(All.latency).p99(10); all_p95 = from(All.latency).p95(10); all_p90 = from(All.latency).p90(10); all_p75 = from(All.latency).p75(10); all_p50 = from(All.latency).p50(10); all_heatmap all_heatmap = from(All.latency).thermodynamic(100, 20); // Service scope metric service_resp_time = from(Service.latency).longAvg(); service_sla = from(Service.*).percent(status == true); service_cpm = from(Service 0 码力 | 21 页 | 5.29 MB | 1 年前 3 OpenShift Container Platform 4.10 可伸缩性和性能 环 环境 境变 变量 量 描述 描述 LATENCY_TEST_DE LAY 指定测试开始运行的时间（以秒为单位）。您可以使用变量来允许 CPU 管理器协 调循环来更新默认的 CPU 池。默认值为 0。 LATENCY_TEST_CP US 指定运行延迟测试的 pod 使用的 CPU 数量。如果没有设置变量，则默认配置包含 所有隔离的 CPU。 LATENCY_TEST_RU NTIME 指定延迟 HWLATDETECT_MA XIMUM_LATENCY 指定工作负载和操作系统的最大可接受硬件延迟（微秒）。如果您没有设置 HWLATDETECT_MAXIMUM_LATENCY 或 MAXIMUM_LATENCY 的值， 该工具会比较默认预期阈值(20μs)和工具本身中实际的最大延迟。然后，测试会失 败或成功。 CYCLICTEST_MAXI MUM_LATENCY 指定 cyclictest 运行 果您没有设置 CYCLICTEST_MAXIMUM_LATENCY 或 MAXIMUM_LATENCY 的值，该 工具会跳过预期和实际最大延迟的比较。 OSLAT_MAXIMUM_L ATENCY 指定 oslat 测试结果的最大可接受延迟（微秒）。如果您没有设置 OSLAT_MAXIMUM_LATENCY 或 MAXIMUM_LATENCY 的值，该工具会跳 过预期和实际最大延迟的比较。 MAXIMUM_LATENC 0 码力 | 315 页 | 3.19 MB | 2 年前 3 共 990 条 1 2 3 4 5 6 99 前往 页 相关搜索词 GCLatencyGo语言GoroutineHeapC++并行算法原子min/max并行范围算法并发编程Task Based ConcurrencyTask QueuesWork ContractsSignal TreeLock Free线程模型Java ChassisTPS优化Performance AnalysisPerformance ProfilingThroughputCachingCompression TechniquesQuantizationModel FootprintFloating-Pointembedded devicesmachine learningreal-time processinglow latencyUltra low-latency executionOptiver低延迟系统量化交易Istio TelemetryObservabilityService MeshSkyWalkingProtocol可伸缩性性能存储优化边缘网络性能配置集