November 3-5, Conference and Tracks Novemeber 6-7 Tutorials Hyatt Regency San Francisco 5 Embarcadero Center San Francisco, CA 94111
Meet the Azul Systems team in Booth #6 to learn more about better JVM and Java support options for all your applications. Also, don’t miss Azul CTO Gil Tene, who will be speaking in several sessions:
Priming Java for Speed Location: Seacliff A/B Day: Monday Duration: 5:25pm – 6:15pm Track: Sponsored Solutions Track I
Dynamically optimized environments present unique challenges for trading systems. Dynamic optimizations give us faster code, but can also bring temporary slowdowns, often at the worst possible times. After GC complaints, the most common issues we hear about in latency sensitive Java-based systems have to do with “warmup” behavior and de-optimization slowdowns. E.g. these seem to predictably hit trading systems just as the market opens, resulting in slow trades when speed matters most. In this talk, Gil Tene (CTO, Azul Systems) will provide an overview of JIT compiler optimization techniques and their impact on common slowdown scenarios. Gil will cover the technical issues behind such slowdowns, and discuss new techniques that may be used to avoid them, including the use of features specifically built to tame the JVM and improve behavior at market open.
Faster Object Arrays Location: Grand Ballroom A Day: Wednesday Duration: 4:10pm – 5:00pm Track: Java at the Cutting Edge
Java is fast. Really fast. But the memory layout of objects and arrays is an area where Java still inherently lags (in speed) behind the C family of languages.
This session introduces org.ObjectLayout and StructuredArray, a new Java collection library and an array class designed specifically to enable JVMs to optimize memory layout for arrays of objects in a way that closely matches the performance behaviors of arrays of structs in C. org.ObjectLayout works on any JDK (version 6.0 and above), but when “intrinsified” in newer JDKs, it brings dead-reckoning and streaming speed to what is in essence an array of Java objects.
The presentation covers the APIs and design considerations behind them and explains the fundamentals behind logic that can allow Java JDKs to match C on data structure access speeds.
Java Performance Panel Location: Grand Ballroom A Day: Wednesday Duration: 5:25pm – 6:15pm Track: Java at the Cutting Edge
The panelists will discuss Java performance subjects, bringing their specific experiences to bear. The discussion will compare Java with other runtimes and languages, and debate recent and future Java-specific performance subjects.
Workshop: Understanding Latency and Application Responsiveness Location: Seacliff B Day: Friday, November 7 Duration: 9 AM – 4 PM Level: Beginner
Managing, monitoring, and improving application responsiveness is a common need for many software professionals. Whether you develop Java applications or manage them, understanding application responsiveness and the major mechanisms that affect it is key to achieving successful applications and happy users. In this workshop, Gil Tene (CTO, Azul Systems) will provide an in-depth overview of Latency and Response Time Characterization, including proven methodologies for measuring, reporting, and investigating latencies, and and overview of some common pitfalls encountered (far too often) in the field. While most of this discussion will apply to all application environments, some specific considerations in JVM based environments will be covered as part of this workshop. Our discussion will include an exploration of of the common needs and motivations for understanding the behavior of application response time and latency, and ways to successfully capture these descriptions and relate them to business needs. However, even good characterization of bad data is useless. If measurements of response time present false or misleading latency information, even the best analysis can lead to wrong operational decisions and poor application experience. Gil will demonstrate and discusses some common pitfalls, false assumptions and problematic measurement techniques that lead to dramatically incorrect reporting results, and will explain how these false measurements naturally occur using the most common measurement methods and tools in use today. We will discuss the coordinated data omission problem, and ways to work around it, and will introduce and demonstrate how simple and recently open sourced tools can be used to improve and gain higher confidence in both latency measurement and reporting. Garbage Collection, in platforms that use it, is often dominantly responsible for application responsiveness and latency behavior. Gil will review and classify the various garbage collectors and collection techniques available in managed runtimes today. We will define terms and metrics common to all collectors, classify some commonly available collector mechanisms, and discuss the tradeoffs involved in balancing responsiveness requirements against other concerns (like throughput, space, etc.). We will include an interactive discussion of how these tradeoffs play off in the real world. Who should attend: Software developers, architects, technical leaders and anyone with an interest in designing or measuring for latency in software environments.