You get an OutOfMemoryError because your program requires more memory than the JVM has available. There is nothing you can specifically do at run time to help this.
I gave a talk in coscup 2011. My topic is about using openframeworks in mobile application. :)
You can download the demo code from github. https://github.com/janetyc/CosBird
I gave a talk in coscup 2011. My topic is about using openframeworks in mobile application. :)
You can download the demo code from github. https://github.com/janetyc/CosBird
In computer science, synchronization refers to one of two distinct but related concepts: synchronization of processes, and synchronization of data. Process synchronization refers to the idea that multiple processes are to join up or handshake at a certain point, in order to reach an agreement or commit to a certain sequence of action. Data synchronization refers to the idea of keeping multiple copies of a dataset in coherence with one another, or to maintain data integrity. Process synchronization primitives are commonly used to implement data synchronization.
JVM memory metrics and rules for detecting likely OOM caused crashAjit Bhingarkar
The document describes memory usage pattern in JVM at OOM, and identifies rules for an early detection system which can alert about impending OOM error, and hence a crash.
JVM memory metrics and rules for detecting possible OOM caused crashAtharva Bhingarkar
The document describes memory usage pattern in JVM at OOM, and identifies rules for an early detection system which can alert about impending OOM error, and hence a crash.
O pening Files w ith LOCI Bio - FormatsJay Thakkar
Other file types, particularly proprietary formats that contain batches of images such as
OpenLab .LIFs, Leica .LEI and .LIF and SlideBook .SLD files, can be opened using the
LOCI Bio
-
Formats plugin.
Enhancing Research Orchestration Capabilities at ORNL.pdfGlobus
Cross-facility research orchestration comes with ever-changing constraints regarding the availability and suitability of various compute and data resources. In short, a flexible data and processing fabric is needed to enable the dynamic redirection of data and compute tasks throughout the lifecycle of an experiment. In this talk, we illustrate how we easily leveraged Globus services to instrument the ACE research testbed at the Oak Ridge Leadership Computing Facility with flexible data and task orchestration capabilities.
Innovating Inference - Remote Triggering of Large Language Models on HPC Clus...Globus
Large Language Models (LLMs) are currently the center of attention in the tech world, particularly for their potential to advance research. In this presentation, we'll explore a straightforward and effective method for quickly initiating inference runs on supercomputers using the vLLM tool with Globus Compute, specifically on the Polaris system at ALCF. We'll begin by briefly discussing the popularity and applications of LLMs in various fields. Following this, we will introduce the vLLM tool, and explain how it integrates with Globus Compute to efficiently manage LLM operations on Polaris. Attendees will learn the practical aspects of setting up and remotely triggering LLMs from local machines, focusing on ease of use and efficiency. This talk is ideal for researchers and practitioners looking to leverage the power of LLMs in their work, offering a clear guide to harnessing supercomputing resources for quick and effective LLM inference.
top nidhi software solution freedownloadvrstrong314
This presentation emphasizes the importance of data security and legal compliance for Nidhi companies in India. It highlights how online Nidhi software solutions, like Vector Nidhi Software, offer advanced features tailored to these needs. Key aspects include encryption, access controls, and audit trails to ensure data security. The software complies with regulatory guidelines from the MCA and RBI and adheres to Nidhi Rules, 2014. With customizable, user-friendly interfaces and real-time features, these Nidhi software solutions enhance efficiency, support growth, and provide exceptional member services. The presentation concludes with contact information for further inquiries.
Understanding Globus Data Transfers with NetSageGlobus
NetSage is an open privacy-aware network measurement, analysis, and visualization service designed to help end-users visualize and reason about large data transfers. NetSage traditionally has used a combination of passive measurements, including SNMP and flow data, as well as active measurements, mainly perfSONAR, to provide longitudinal network performance data visualization. It has been deployed by dozens of networks world wide, and is supported domestically by the Engagement and Performance Operations Center (EPOC), NSF #2328479. We have recently expanded the NetSage data sources to include logs for Globus data transfers, following the same privacy-preserving approach as for Flow data. Using the logs for the Texas Advanced Computing Center (TACC) as an example, this talk will walk through several different example use cases that NetSage can answer, including: Who is using Globus to share data with my institution, and what kind of performance are they able to achieve? How many transfers has Globus supported for us? Which sites are we sharing the most data with, and how is that changing over time? How is my site using Globus to move data internally, and what kind of performance do we see for those transfers? What percentage of data transfers at my institution used Globus, and how did the overall data transfer performance compare to the Globus users?
May Marketo Masterclass, London MUG May 22 2024.pdfAdele Miller
Can't make Adobe Summit in Vegas? No sweat because the EMEA Marketo Engage Champions are coming to London to share their Summit sessions, insights and more!
This is a MUG with a twist you don't want to miss.
How Recreation Management Software Can Streamline Your Operations.pptxwottaspaceseo
Recreation management software streamlines operations by automating key tasks such as scheduling, registration, and payment processing, reducing manual workload and errors. It provides centralized management of facilities, classes, and events, ensuring efficient resource allocation and facility usage. The software offers user-friendly online portals for easy access to bookings and program information, enhancing customer experience. Real-time reporting and data analytics deliver insights into attendance and preferences, aiding in strategic decision-making. Additionally, effective communication tools keep participants and staff informed with timely updates. Overall, recreation management software enhances efficiency, improves service delivery, and boosts customer satisfaction.
Unleash Unlimited Potential with One-Time Purchase
BoxLang is more than just a language; it's a community. By choosing a Visionary License, you're not just investing in your success, you're actively contributing to the ongoing development and support of BoxLang.
Large Language Models and the End of ProgrammingMatt Welsh
Talk by Matt Welsh at Craft Conference 2024 on the impact that Large Language Models will have on the future of software development. In this talk, I discuss the ways in which LLMs will impact the software industry, from replacing human software developers with AI, to replacing conventional software with models that perform reasoning, computation, and problem-solving.
In software engineering, the right architecture is essential for robust, scalable platforms. Wix has undergone a pivotal shift from event sourcing to a CRUD-based model for its microservices. This talk will chart the course of this pivotal journey.
Event sourcing, which records state changes as immutable events, provided robust auditing and "time travel" debugging for Wix Stores' microservices. Despite its benefits, the complexity it introduced in state management slowed development. Wix responded by adopting a simpler, unified CRUD model. This talk will explore the challenges of event sourcing and the advantages of Wix's new "CRUD on steroids" approach, which streamlines API integration and domain event management while preserving data integrity and system resilience.
Participants will gain valuable insights into Wix's strategies for ensuring atomicity in database updates and event production, as well as caching, materialization, and performance optimization techniques within a distributed system.
Join us to discover how Wix has mastered the art of balancing simplicity and extensibility, and learn how the re-adoption of the modest CRUD has turbocharged their development velocity, resilience, and scalability in a high-growth environment.
OpenFOAM solver for Helmholtz equation, helmholtzFoam / helmholtzBubbleFoamtakuyayamamoto1800
In this slide, we show the simulation example and the way to compile this solver.
In this solver, the Helmholtz equation can be solved by helmholtzFoam. Also, the Helmholtz equation with uniformly dispersed bubbles can be simulated by helmholtzBubbleFoam.
Code reviews are vital for ensuring good code quality. They serve as one of our last lines of defense against bugs and subpar code reaching production.
Yet, they often turn into annoying tasks riddled with frustration, hostility, unclear feedback and lack of standards. How can we improve this crucial process?
In this session we will cover:
- The Art of Effective Code Reviews
- Streamlining the Review Process
- Elevating Reviews with Automated Tools
By the end of this presentation, you'll have the knowledge on how to organize and improve your code review proces
Cyaniclab : Software Development Agency Portfolio.pdfCyanic lab
CyanicLab, an offshore custom software development company based in Sweden,India, Finland, is your go-to partner for startup development and innovative web design solutions. Our expert team specializes in crafting cutting-edge software tailored to meet the unique needs of startups and established enterprises alike. From conceptualization to execution, we offer comprehensive services including web and mobile app development, UI/UX design, and ongoing software maintenance. Ready to elevate your business? Contact CyanicLab today and let us propel your vision to success with our top-notch IT solutions.
Climate Science Flows: Enabling Petabyte-Scale Climate Analysis with the Eart...Globus
The Earth System Grid Federation (ESGF) is a global network of data servers that archives and distributes the planet’s largest collection of Earth system model output for thousands of climate and environmental scientists worldwide. Many of these petabyte-scale data archives are located in proximity to large high-performance computing (HPC) or cloud computing resources, but the primary workflow for data users consists of transferring data, and applying computations on a different system. As a part of the ESGF 2.0 US project (funded by the United States Department of Energy Office of Science), we developed pre-defined data workflows, which can be run on-demand, capable of applying many data reduction and data analysis to the large ESGF data archives, transferring only the resultant analysis (ex. visualizations, smaller data files). In this talk, we will showcase a few of these workflows, highlighting how Globus Flows can be used for petabyte-scale climate analysis.
SOCRadar Research Team: Latest Activities of IntelBrokerSOCRadar
The European Union Agency for Law Enforcement Cooperation (Europol) has suffered an alleged data breach after a notorious threat actor claimed to have exfiltrated data from its systems. Infamous data leaker IntelBroker posted on the even more infamous BreachForums hacking forum, saying that Europol suffered a data breach this month.
The alleged breach affected Europol agencies CCSE, EC3, Europol Platform for Experts, Law Enforcement Forum, and SIRIUS. Infiltration of these entities can disrupt ongoing investigations and compromise sensitive intelligence shared among international law enforcement agencies.
However, this is neither the first nor the last activity of IntekBroker. We have compiled for you what happened in the last few days. To track such hacker activities on dark web sources like hacker forums, private Telegram channels, and other hidden platforms where cyber threats often originate, you can check SOCRadar’s Dark Web News.
Stay Informed on Threat Actors’ Activity on the Dark Web with SOCRadar!
Experience our free, in-depth three-part Tendenci Platform Corporate Membership Management workshop series! In Session 1 on May 14th, 2024, we began with an Introduction and Setup, mastering the configuration of your Corporate Membership Module settings to establish membership types, applications, and more. Then, on May 16th, 2024, in Session 2, we focused on binding individual members to a Corporate Membership and Corporate Reps, teaching you how to add individual members and assign Corporate Representatives to manage dues, renewals, and associated members. Finally, on May 28th, 2024, in Session 3, we covered questions and concerns, addressing any queries or issues you may have.
For more Tendenci AMS events, check out www.tendenci.com/events
Prosigns: Transforming Business with Tailored Technology SolutionsProsigns
Unlocking Business Potential: Tailored Technology Solutions by Prosigns
Discover how Prosigns, a leading technology solutions provider, partners with businesses to drive innovation and success. Our presentation showcases our comprehensive range of services, including custom software development, web and mobile app development, AI & ML solutions, blockchain integration, DevOps services, and Microsoft Dynamics 365 support.
Custom Software Development: Prosigns specializes in creating bespoke software solutions that cater to your unique business needs. Our team of experts works closely with you to understand your requirements and deliver tailor-made software that enhances efficiency and drives growth.
Web and Mobile App Development: From responsive websites to intuitive mobile applications, Prosigns develops cutting-edge solutions that engage users and deliver seamless experiences across devices.
AI & ML Solutions: Harnessing the power of Artificial Intelligence and Machine Learning, Prosigns provides smart solutions that automate processes, provide valuable insights, and drive informed decision-making.
Blockchain Integration: Prosigns offers comprehensive blockchain solutions, including development, integration, and consulting services, enabling businesses to leverage blockchain technology for enhanced security, transparency, and efficiency.
DevOps Services: Prosigns' DevOps services streamline development and operations processes, ensuring faster and more reliable software delivery through automation and continuous integration.
Microsoft Dynamics 365 Support: Prosigns provides comprehensive support and maintenance services for Microsoft Dynamics 365, ensuring your system is always up-to-date, secure, and running smoothly.
Learn how our collaborative approach and dedication to excellence help businesses achieve their goals and stay ahead in today's digital landscape. From concept to deployment, Prosigns is your trusted partner for transforming ideas into reality and unlocking the full potential of your business.
Join us on a journey of innovation and growth. Let's partner for success with Prosigns.
Prosigns: Transforming Business with Tailored Technology Solutions
Memory error-talk
1. Handling “Out of Memory” Errors
John Tang Boyland
ECOOP EHWS, July 25, 2005
2. Handling “Out Of Memory” Errors
H Current advice for handling OutOfMemoryError
– Use to find memory limits.
– Don’t! There’s nothing you can do.
– . . . but Eclipse does!
H The “Hedge” technique.
– allocate a large hedge;
– free when recovering from low memory condition.
H Desiderata
– Language Specification: What is safe if memory is low?
– Compilers: Don’t move allocation later or deallocation earlier.
– Runtime: per-thread memory restrictions.
ECOOP EHWS Handling OutOfMemoryError 1
3. An OutOfMemoryError occurs
?
Exception thrown here
H Recovery difficult because of “low memory” condition.
H When exception is thrown, last request is not fulfilled.
ECOOP EHWS Handling OutOfMemoryError 2
4. Measuring Available Memory
Exception thrown and caught
Object allocated and discarded
H A loop:
– Try allocating a HUGE array;
– Catch the exception and try again with a smaller amount.
– Repeat until no exception is thrown.
H A rough underestimate of available memory.
(More accurate than Runtime.freeMemory().)
ECOOP EHWS Handling OutOfMemoryError 3
5. Reasoning About OutOfMemoryError
H Could occur at any time:
– even in code “proven” not to raise an exception;
– OutOfMemoryError is a subclass of Error,
(in principle) “unpredictable” and “unpreventable” errors.
H . . . well, almost any time:
– if memory needed (allocation, boxing, concatenation);
– if stack needed (call, local var. frame);
– if exception created (NPE, ArrayStoreException, etc).
H Typical advice: don’t try to handle it.
H Alternate advice: use soft/weak references.
ECOOP EHWS Handling OutOfMemoryError 4
6. A “Real” Program Must Handle the Error
H Almost no realistic program can provably avoid running out
of memory.
H For example: Eclipse
– uses more memory if more files are being edited;
– memory is used by many different parts (GUI, Compiler, as-
sistance, markers etc)
H Crashing on OOME is unacceptable:
– user’s work is lost, and
– workbench left (perhaps) in inconsistent state, but
– logging errors or saving files taken memory;
H The error must be handled.
ECOOP EHWS Handling OutOfMemoryError 5
7. Handling OutOfMemoryError in Eclipse (1 of 2)
H Eclipse catches OOME and displays warning dialog:
– but memory is low;
– dialog appears after emergency exit fails;
– otherwise only error messages on Unix stdout.
H Eclipse 3.1 uses a larger max heap size than previously
– Normally degradation (thrashing) long precedes OOME.
– Artificially lowering the heap size gets previous behavior.
ECOOP EHWS Handling OutOfMemoryError 6
8. Handling OutOfMemoryError in Eclipse (2 of 2)
Exception in thread "...JavaReconciler" java.lang.OutOfMemoryError
Exception in thread "...JavaReconciler" java.lang.OutOfMemoryError
Exception in thread "...JavaReconciler" java.lang.OutOfMemoryError
Error while logging event loop exception:
java.lang.OutOfMemoryError: Java heap space
Logging exception:
java.lang.OutOfMemoryError: Java heap space
Error while informing user about event loop exception:
java.lang.OutOfMemoryError: Java heap space
Dialog open exception:
java.lang.OutOfMemoryError: Java heap space
Fatal error happened during workbench emergency close.
java.lang.OutOfMemoryError: Java heap space
Unhandled event loop exception
Reason: Java heap space
H Then dialog brought up.
ECOOP EHWS Handling OutOfMemoryError 7
9. The “Hedge” Technique
H Pre-allocate a large area (the “hedge”);
H When OutOfMemoryError happens, release it;
H After recovery re-allocate hedge.
Recovery time
Hedge
ECOOP EHWS Handling OutOfMemoryError 8
10. Difficulties Using the Hedge Technique
H Need to overestimate memory required for recovery;
H Interrupted computation may leave data inconsistent;
H finally clauses before recovery may re-throw OOME;
H Error may be thrown in thread other than the “guilty” one;
H Compiler may move allocation later or deallocation earlier;
H Cannot be made automatic.
(see next slides)
ECOOP EHWS Handling OutOfMemoryError 9
12. One Problem Leads To Another (2 of 3)
H So we pre-allocate some memory:
void performAction()
{
start();
int[] space = new int[1000];
// Point A
try {
doIt();
} finally {
// Point B
space = null;
cleanup();
}
}
H But what if the compiler . . .
– moves the allocation later (B)?
– moves the deallocation earlier (A)?
ECOOP EHWS Handling OutOfMemoryError 11
13. One Problem Leads To Another (3 of 3)
H Fake uses force early allocation.
H Fake tests force late deallocation.
void performAction()
{
start();
int[] space = new int[1000];
space[45] = 1+space[fact(6)];
try {
doIt();
} finally {
if (space[45] > space[44]) {
space = null;
cleanup();
}
}
}
H We have obfuscated our program.
ECOOP EHWS Handling OutOfMemoryError 12
14. Placing Hedge Recovery
H At outer level
+ few code changes;
+ lock state clear;
- work undone;
H Close to allocation
+ recovery fast;
- state unclear;
H If automatic, then how is recovery invoked?
– at error point, then re-entrancy problems;
– elsewhere, then finally is still an issue.
ECOOP EHWS Handling OutOfMemoryError 13
15. Experiences With Hedge Recovery
H Importing Java Into Internal Representation:
– Must persist in “eras”;
– As few eras as possible;
– No easy way to use weak/soft references;
H Converted JDK 1.4.2 provided source
– 4500 source files;
– 12 hours;
– 11 OutOfMemoryErrors generated;
– (300 Mb max heap on Solaris x86).
H Avoided threading issues (single-threaded code).
ECOOP EHWS Handling OutOfMemoryError 14
16. Conclusions
H Hedge recovery can work.
Perhaps Eclipse could use it.
H Hedge recovery would be safer if:
– Language specified what operations need memory;
– Compilers don’t move allocation/deallocation past try-finally
boundaries;
– Threads had own memory restrictions.
H Thrashing is a good alternative for interactive programs.
ECOOP EHWS Handling OutOfMemoryError 15