This talk was given in ilJUG on the 29th of July 2014 and discusses the new Java8 StampedLock class. It compares it to different locking mechanism is Java and shows some insights deduced from a simple benchmark
This presentation is about advanced multithreading and concurrency in Java. I have tried my best to explain the concepts with code. Feel free to reach me if you have any questions or concerns.
Advanced Introduction to Java Multi-Threading - Full (chok)choksheak
Designed for the beginning Java developer to grasp advanced Java multi-threading concepts quickly. Talks mainly about the Java Memory Model and the Concurrent Utilities. This presentation is Java-specific and we intentionally omit general non-Java-specific details, such as hardware architecture, OS, native threads, algorithms, and general software design principles etc.
This presentation is about advanced multithreading and concurrency in Java. I have tried my best to explain the concepts with code. Feel free to reach me if you have any questions or concerns.
Advanced Introduction to Java Multi-Threading - Full (chok)choksheak
Designed for the beginning Java developer to grasp advanced Java multi-threading concepts quickly. Talks mainly about the Java Memory Model and the Concurrent Utilities. This presentation is Java-specific and we intentionally omit general non-Java-specific details, such as hardware architecture, OS, native threads, algorithms, and general software design principles etc.
Presentation describes basic concepts of thread pool such as:
- interacting with queues,
- using pools from Executors class,
- task rejecting
- using ThreadFactory for thread creating
- Future and Callable interfaces,
- basic API
- possibilities for extending
This session discusses about the basic building blocks of Concurrent Programming in Java, which include:
high-level concurrency objects, lock objects, executors, executor interfaces, thread pools, fork/join, concurrent collections, atomic variables, concurrent random numbers.
Threads are lightweight processes as the overhead of switching between threads is less
Synchronization allows only one thread to perform an operation on a object at a time.
Synchronization prevent data corruption
Thread Synchronization-The synchronized methods define critical sections.
You will learn the Deadlock Condition in Threads and Syncronization of Threads
Java Multi Threading Concept
By N.V.Raja Sekhar Reddy
www.technolamp.co.in
Want more...
Like us @ https://www.facebook.com/Technolamp.co.in
subscribe videos @ http://www.youtube.com/user/nvrajasekhar
Lecture 10 from the IAG0040 Java course in TTÜ.
See the accompanying source code written during the lectures: https://github.com/angryziber/java-course
Slide deck from my presentation on multi-threading with .NET. The presentation covers from beginner onwards and looks at current technologies (i.e. pre .NET 4.0) specifically.
What makes this extra special is the entire process of how I prepared for it, from finding content to slide deck layout to presentation prep is documented at: http://www.sadev.co.za/content/how-i-build-presentations-series-index
Java has a solid Memory Model, and there are a couple of excellent libraries for concurrency. When you start working with threads however, pitfalls start appearing - especially if the program is supposed to be fast and correct. This session shows proven solutions for some typical problems, showing how to view program code from a concurrency perspective: Which threads share which data, and how? How to reduce the impact of locks? How to avoid them altogether - and when is that worth it?
Roommates matter particularly in college or university. Marcie Tucker, Ph.D./CEO of MyRoomsolution, summarizes the key research on belonging and how roommate relationships are key to student retention. Moreover, all roommate conflict is not the same and in today's age of personalized customer service we want a solution that fits our problem. We have a solution to support students and their development AND helps college/university staff develop a more effective intervention strategy.
Presentation describes basic concepts of thread pool such as:
- interacting with queues,
- using pools from Executors class,
- task rejecting
- using ThreadFactory for thread creating
- Future and Callable interfaces,
- basic API
- possibilities for extending
This session discusses about the basic building blocks of Concurrent Programming in Java, which include:
high-level concurrency objects, lock objects, executors, executor interfaces, thread pools, fork/join, concurrent collections, atomic variables, concurrent random numbers.
Threads are lightweight processes as the overhead of switching between threads is less
Synchronization allows only one thread to perform an operation on a object at a time.
Synchronization prevent data corruption
Thread Synchronization-The synchronized methods define critical sections.
You will learn the Deadlock Condition in Threads and Syncronization of Threads
Java Multi Threading Concept
By N.V.Raja Sekhar Reddy
www.technolamp.co.in
Want more...
Like us @ https://www.facebook.com/Technolamp.co.in
subscribe videos @ http://www.youtube.com/user/nvrajasekhar
Lecture 10 from the IAG0040 Java course in TTÜ.
See the accompanying source code written during the lectures: https://github.com/angryziber/java-course
Slide deck from my presentation on multi-threading with .NET. The presentation covers from beginner onwards and looks at current technologies (i.e. pre .NET 4.0) specifically.
What makes this extra special is the entire process of how I prepared for it, from finding content to slide deck layout to presentation prep is documented at: http://www.sadev.co.za/content/how-i-build-presentations-series-index
Java has a solid Memory Model, and there are a couple of excellent libraries for concurrency. When you start working with threads however, pitfalls start appearing - especially if the program is supposed to be fast and correct. This session shows proven solutions for some typical problems, showing how to view program code from a concurrency perspective: Which threads share which data, and how? How to reduce the impact of locks? How to avoid them altogether - and when is that worth it?
Roommates matter particularly in college or university. Marcie Tucker, Ph.D./CEO of MyRoomsolution, summarizes the key research on belonging and how roommate relationships are key to student retention. Moreover, all roommate conflict is not the same and in today's age of personalized customer service we want a solution that fits our problem. We have a solution to support students and their development AND helps college/university staff develop a more effective intervention strategy.
Il Kettlebell: la pesistica del popolo, la forza per tutti
Emanuele Conti
http://www.calzetti-mariucci.it/shop/prodotti/il-kettlebell-la-pesistica-del-popolo-la-forza-per-tutti
TrinityP3 Marketing Management Webinars
http://www.trinityp3.com/product-category/webinars/
Managing marketing and your agency suppliers continues to become increasingly complex and time consuming. TrinityP3 Marketing Management Consultants are thought-leaders in all aspects of marketing management to improve marketing and agency performance and increase implementation efficiency. This series of webinars are your opportunity to hear the latest industry best trends and practices from the consultants working in this category on a daily basis regionally and globally. An interactive approach means you will be able to have your specific questions answered by industry leading practitioners.
Topic: Transforming Production for the 21st Century
Date: Wednesday September 23
Time: 13:00 – 14:00 AEST
Presenter: Christopher Sewell
Description: The explosion of digital channels has completely changed the landscape of advertising communications. But while the language around multi-channel content creation has evolved the old approaches to production management and creation has not necessarily kept up. Find out how to transform your approach to marketing production spend without being blindsided by vested interests.
The rapid rate of technological change can be overwhelming. Everyone sometimes needs to have a virtual CIO on call.
A virtual CIO can help the CIO, IT director, or business owner evaluate new technology, translate between IT and the business units, motivate and mentor effectively, and keep the big picture in focus. This holistic approach helps to create value, integrate systems, save costs, lower risks, increase innovation and produce successful outcomes.
IT Consultation — Expert, unbiased advice on a breadth of operational and strategic areas. This is tailored to the organization’s need, size, culture, and cost preferences. It may consist of providing a second opinion; briefing on industry best practices (e.g., for disaster recovery); building a support infrastructure (e.g., for mobile device support); or doing the problem analysis, plan, cost justification and presentations to the Board, among other possibilities.
Cloud Readiness Audits — Assessment of existing systems architecture, recommendations on which operational, financial, and accounting processes that could be moved to the cloud, and how to do so.
Rescue Assessments — Highly focused, impartial review of breakdowns in systems, applications, infrastructure and more. No finger-pointing, just a solid plan to fix the problem and get you back on track.
Support for Relocations — Experienced and thorough guidance in planning and executing the relocation of servers, networking and other computing assets to ensure efficiency, safety and continuity of operations.
Mentoring — Skills assessment and development; executive coaching; linking business and technology objectives to team performance; and requirements definition for strategic staffing.
Presentation given at the Toulouse JUG in Dec 2019
GraalVM and its native-image component allow building native standalone executables from Java or any other language compiling to Java bytecode like Scala or Kotlin.
This talks goes through the practical steps leading to producing a native executable for a command-line tool, explaining the benefits and also the limits of GraalVM native-image.
Nonblocking (NB) algorithms are something of a Holy Grail of concurrent programming--typically very fast, even under heavy load, they come with hard guarantees about forward progress. The downside is that they are very hard to get right. This presentations authors worked on writing some nonblocking utilities (open sourced on SourceForge in the high-scale-lib project) and have made some progress toward a coding style that can be used to build a variety of NB data structures: hash tables, sets, work queues, and bit vectors. These data structures scale much better than even the concurrent JDK™ software utilities while providing the same correctness guarantees. They usually have similar overheads at the low end while scaling incredibly well on high-end hardware. The coding style is still very immature but shows clear promise. It stems from a handful of basic premises: You don't hide payload during updates; any thread can complete (or ignore) any in-progress update; use flat arrays for quick access and broadest-possible striping; and use parallel, concurrent, incremental array copy. At the core is a simple state-machine description of the update logic.
Presentation on the Batch JSR (JSR-352) in JavaOne India, Hyderabad 2013.
Thanks to http://www.slideshare.net/reza_rahman and http://www.slideshare.net/arungupta1 for the source slides.
Azul Virtual Machine Engineer Douglas Hawkins describes how decisions made by the JVM affect how your code is compiled and run. Learn how this affects application performance and what steps you can take to optimize how the JVM acts on your code.
This talk describes the current state of the Veil-Framework and the different tools included in it such as Veil-Evasion, Veil-Catapult, Veil-Powerview, Veil-Pillage, Veil-Ordnance
Core Java Programming Language (JSE) : Chapter XII - ThreadsWebStackAcademy
What are Java Threads?
A thread is a:
Facility to allow multiple activities within a single process
Referred as lightweight process
A thread is a series of executed statements
Each thread has its own program counter, stack and local variables
A thread is a nested sequence of method calls
Its shares memory, files and per-process state
How to create thread:
There are two ways to create a thread:
1. By extending Thread class
2. By implementing Runnable interface.
Thread class:
Thread class provide constructors and methods to create and perform operations on a thread.Thread class extends Object class and implements Runnable interface.
JVM Mechanics: When Does the JVM JIT & Deoptimize?Doug Hawkins
HotSpot promises to do the "right" thing for us by identifying our hot code and compiling "just-in-time", but how does HotSpot make those decisions?
This presentation aims to detail how HotSpot makes those decisions and how it corrects its mistakes through a series of demos that you run yourself.
Loom me up Scotty! Project Loom - What's in it for Me?Haim Yadid
Project Loom is a huge step forward in the way the JVM implements concurrency. It introduces a concurrency model that is straight forward to use without sacrificing scalability. It gets a lot of traction since it was released in preview mode in Java 19, however, it is not a silver bullet that will magically resolve everything. In this talk we will go through the essentials of the project and help understand when and where applying it will make your life as a Java developer significantly better.
“Show Me the Garbage!”, Garbage Collection a Friend or a FoeHaim Yadid
“Just leave the garbage outside and we will take care of it for you”. This is the panacea promised by garbage collection mechanisms built into most software stacks available today. So, we don’t need to think about it anymore, right? Wrong! When misused, garbage collectors can fail miserably. When this happens they slow down your application and lead to unacceptable pauses. In this talk we will go over different garbage collectors approaches and understand under which conditions they function well.
Kotlin Backend Development 6 Yrs Recap. The Good, the Bad and the UglyHaim Yadid
NEXT Insurance is a US based insurtech startup, revolutionizing the small business insurance industry. NEXT was founded 6 years ago and ever since we have been building our microservices in Kotlin. During this period we grew from a small startup with one backend developer(myself) to a $4B company with 150 backend developers. We have written over 1.2M lines of code in Kotlin and aquired long mileage with this programming language. In this talk I am going to share our experiences, insights and pains.
This talk was given in JFokus 2022
“Show Me the Garbage!”, Understanding Garbage CollectionHaim Yadid
“Just leave the garbage outside and we will take care of it for you”. This is the panacea promised by garbage collection mechanisms built into most software stacks available today. So, we don’t need to think about it anymore, right? Wrong! When misused, garbage collectors can fail miserably. When this happens they slow down your application and lead to unacceptable pauses. In this talk we will go over different garbage collectors approaches in different software runtimes and what are the conditions which enable them to function well.
Presented on Reversim summit 2019
https://summit2019.reversim.com/session/5c754052d0e22f001706cbd8
Understanding how memory is structured on the JVM ( Hotspot/OpenJDK) becomes important when you really want to troubleshoot your production environment. In this short talk I will delve into the basics of the topic and demystify some of the misconceptions.
Talk given at Java.IL user group
An old wise man once said "Understanding where the problem resides is the first step to solving it" This short talk will show how finding the nature of performance problem can be easily identified by simple JMX exposed by the JVM. And yes quoting my own sentences as old wisdom make them sound more reliable.
On September 2007 I started a journey. I left a position as a System Architect in a big Software company and started a career as an independent consultant. This have been a hell of a journey. Two years ago I returned to the warmth of the payroll (business was doing great btw as a freelancer). Along these years I found myself many times answering questions on how this is done. This lead me to the conclusion that the know how may be of an interest to the community and I want to share with you. I believe that anyone who considers becoming an independent contractor/consultant will greatly benefit from this talk.
Next Insurance was founded at the beginning of 2016, and the first lines of its production code started accumulating in May 2016. As the first back-end developer, I started writing in Java and out of curiosity was experimenting with Kotlin. Kotlin had just seen its 1.0 release two months earlier. A year later, Next Insurance’s entire back-end development team is writing all the code in Kotlin. We already have 8 microservices and several AWS lambda functions all written in Kotlin. Migration from 1.0.x to Kotlin 1.1 was smooth, and the developers are happy. This presentation covers the language’s features and why I think it is awesome and fits perfectly with my company’s architecture.
Next Insurance was founded in the beginning of 2016 and first lines of our production code started accumulating in May 2016. In the beginning I have started writing in Java and experimenting with Kotlin, which saw its 1.0 release two months earlier. 6 months later, the development of our backend services has totally shifted to Kotlin. We still keep a few classes in Java just to make sure that the integration remains seamless but the vast majority of our codebase is written in Kotlin. In this talk I will cover the language features and why I think it is awesome, from null safety to smart casts and data classes. We will also look into the future with 1.1 async/await feature and more.
Garbage collection is the most famous (infamous) JVM mechanism and it dates back to Java 1.0. Every Java developer knows about its existence yet most of the time we wish we can ignore its behavior and assume it works perfectly. Unfortunately this is not the case and if you are ignoring it, GC may hit you really hard.... in production. Furthermore the information that you may find on the web can be a lot of times misleading. In this event we will try to demystify some of the misconceptions around GC by understanding how different GC mechanisms work and how to make the right decisions in order to make them work for you.
mjprof: Monadic approach for JVM profilingHaim Yadid
A traditional Java profiler consists of two components. One collects profile data from the running application and the other is a visualization user interface to query the data. The profiler capabilities are limited by the data collected but also by the provided reports and functionality. This can be limiting when it comes to complex query of data. In this session we will introduce mjprof. It is an open source textual visualization profiler. It is extremely powerful as it enables you to compose a sequence of simple steps (monads) such as filters, transformations, group-by which let you slice and dice the data to pinpoint the problem. Working with mjprof resembles working with UNIX pipes. We will explain how to use this tool and present use cases and success stories, using this profiler in the last months. mjprof is written in Java and can be found on github as part of the AdoptOpenJDK project.
Concurrency and Multithreading Demistified - Reversim Summit 2014Haim Yadid
Life as a software engineer is so exciting! Computing power continue to rise exponentially, software demands continue to rise exponentially as well, so far so good. The bad news are that in the last decade the computing power of single threaded application remains almost flat.
If you decide to continue ignoring concurrency and multi-threading the gap between the problems you are able to solve and your hardware capabilities will continue to rise. In this session we will discuss different approaches for taming the concurrency beast, such as shared mutability,shared immutability and isolated mutability actors, STM, etc we will discuss the shortcomings and the dangers of each approach and we will compare different programming languages and how they choose to tackle/ignore concurrency.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
Neuro-symbolic is not enough, we need neuro-*semantic*Frank van Harmelen
Neuro-symbolic (NeSy) AI is on the rise. However, simply machine learning on just any symbolic structure is not sufficient to really harvest the gains of NeSy. These will only be gained when the symbolic structures have an actual semantics. I give an operational definition of semantics as “predictable inference”.
All of this illustrated with link prediction over knowledge graphs, but the argument is general.
JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
UiPath Test Automation using UiPath Test Suite series, part 3DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 3. In this session, we will cover desktop automation along with UI automation.
Topics covered:
UI automation Introduction,
UI automation Sample
Desktop automation flow
Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
Are you looking to streamline your workflows and boost your projects’ efficiency? Do you find yourself searching for ways to add flexibility and control over your FME workflows? If so, you’re in the right place.
Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
Slack (or Teams) Automation for Bonterra Impact Management (fka Social Soluti...Jeffrey Haguewood
Sidekick Solutions uses Bonterra Impact Management (fka Social Solutions Apricot) and automation solutions to integrate data for business workflows.
We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases.
This video focuses on the notifications, alerts, and approval requests using Slack for Bonterra Impact Management. The solutions covered in this webinar can also be deployed for Microsoft Teams.
Interested in deploying notification automations for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
2. About
Me:
Haim
Yadid
•21 Years of SW development experience
•Performance Expert
•Consulting R&D Groups
•Training: Java Performance Optimization
•Organizing : ILJUG
3. IL
JUG
•Israeli Java User Group
•Reborn at 1/14
•Meetup : http://www.meetup.com/IL-JUG
•G+: https://plus.google.com/u/0/communities/110138558454900054301
•Twitter: @il_jug
6. Contention
•Two threads are considered to be
contended when they try to access same
lock on the same time
•Locking mechanism behaves differently
under contention
• Contention degrades performance
dramatically