what every web and app developer should know about multithreading
•Download as PPT, PDF•
0 likes•1,038 views
Multithreading allows executing multiple tasks simultaneously by splitting a program into multiple threads. It is useful for improving performance on web applications and when disk/network I/O is involved. However, threads introduce complexity as code and data may be accessed concurrently. Synchronization techniques like mutexes are needed to coordinate thread access and prevent race conditions from causing unpredictable behavior. Developers must carefully manage shared resources and avoid deadlocks when using multithreading.
Report
Share
Report
Share
Recommended
Multi-Threading
This document discusses .NET multi-threading concepts including blocking, locking, signaling, and non-blocking techniques. It provides code examples for managing threads using techniques like Join, lock, Mutex, and EventWaitHandle. It also covers thread pools, common problems like race conditions and deadlocks, and proven practices for safe multi-threaded programming.
.NET: Thread Synchronization Constructs
This document discusses various thread synchronization constructs in .NET. It begins with an overview of threads and multithreading concepts. It then covers challenges in sharing data between threads and ensuring thread safety. The document proceeds to explain common synchronization constructs like locks, mutexes, semaphores, and event wait handles. It also discusses atomic interlocked operations and hybrid constructs like concurrent collections. Examples are provided for many of the synchronization primitives.
Threads And Synchronization in C#
Threads And Synchronization in C#
Concept about Threads And Synchronization in C#
it will help you about this concept
feel free
Download free programming applications on
http://www.androidapplications.xyz
Threading in C#
This document discusses multithreading in C#. It introduces threads and multithreading, describing how operating systems allow multitasking and how threads work. It explains that the .NET Framework supports multithreading using the System.Threading namespace and Thread class. It describes properties and methods of the Thread class, potential problems like deadlocks that can occur with multithreading, and solutions like synchronization and locking to prevent issues.
Multi threading
Multi-threading allows a single program to execute multiple programs simultaneously by utilizing CPU processing time more efficiently and reducing idle time. Threads can be created by implementing the Runnable interface or extending the Thread class and go through life cycle stages of new, runnable, blocked, and dead. The join method allows a parent thread to wait for child threads to terminate before ending, and synchronization techniques ensure shared resources are accessed properly between threads.
IEEE1588 - Collision avoidance for Delay_Req messages in broadcast media
This presentation has been given during ISPCS in 2009. The full paper is available form http://eprints.adm.unipi.it/.
Multithreading 101
This document provides an overview of multithreading concepts including when to use threads, threading primitives like mutexes and semaphores, common issues like race conditions and deadlocks, and alternatives to using threads. Key topics covered include GUI responsiveness, utilizing all processors, network connectivity, atomic functions, mutual exclusion, events and conditions, and memory barriers.
Information and data security advanced encryption standard (aes)
Information And Data Security Advanced Encryption Standard (AES) seminar
Mustansiriya University
Department of Education
Computer Science
Recommended
Multi-Threading
This document discusses .NET multi-threading concepts including blocking, locking, signaling, and non-blocking techniques. It provides code examples for managing threads using techniques like Join, lock, Mutex, and EventWaitHandle. It also covers thread pools, common problems like race conditions and deadlocks, and proven practices for safe multi-threaded programming.
.NET: Thread Synchronization Constructs
This document discusses various thread synchronization constructs in .NET. It begins with an overview of threads and multithreading concepts. It then covers challenges in sharing data between threads and ensuring thread safety. The document proceeds to explain common synchronization constructs like locks, mutexes, semaphores, and event wait handles. It also discusses atomic interlocked operations and hybrid constructs like concurrent collections. Examples are provided for many of the synchronization primitives.
Threads And Synchronization in C#
Threads And Synchronization in C#
Concept about Threads And Synchronization in C#
it will help you about this concept
feel free
Download free programming applications on
http://www.androidapplications.xyz
Threading in C#
This document discusses multithreading in C#. It introduces threads and multithreading, describing how operating systems allow multitasking and how threads work. It explains that the .NET Framework supports multithreading using the System.Threading namespace and Thread class. It describes properties and methods of the Thread class, potential problems like deadlocks that can occur with multithreading, and solutions like synchronization and locking to prevent issues.
Multi threading
Multi-threading allows a single program to execute multiple programs simultaneously by utilizing CPU processing time more efficiently and reducing idle time. Threads can be created by implementing the Runnable interface or extending the Thread class and go through life cycle stages of new, runnable, blocked, and dead. The join method allows a parent thread to wait for child threads to terminate before ending, and synchronization techniques ensure shared resources are accessed properly between threads.
IEEE1588 - Collision avoidance for Delay_Req messages in broadcast media
This presentation has been given during ISPCS in 2009. The full paper is available form http://eprints.adm.unipi.it/.
Multithreading 101
This document provides an overview of multithreading concepts including when to use threads, threading primitives like mutexes and semaphores, common issues like race conditions and deadlocks, and alternatives to using threads. Key topics covered include GUI responsiveness, utilizing all processors, network connectivity, atomic functions, mutual exclusion, events and conditions, and memory barriers.
Information and data security advanced encryption standard (aes)
Information And Data Security Advanced Encryption Standard (AES) seminar
Mustansiriya University
Department of Education
Computer Science
The Pillars Of Concurrency
The document discusses three pillars of concurrency:
1) Responsiveness and isolation through using background threads to avoid blocking the main UI thread.
2) Throughput and scalability by distributing work across multiple threads to maximize all available CPU cores.
3) Consistency by dealing with shared memory access across threads to prevent race conditions and deadlocks, such as through immutable objects, message passing, and transactional memory.
Class3
This document provides an overview of cryptography concepts including:
- Homework 1 is due on 1/18 and project 1 is due the next day
- It reviews classical ciphers, modern symmetric ciphers like DES, and basic cryptography terminology
- It describes the Feistel cipher structure used in DES, the DES algorithm details like key scheduling and rounds, and strengths and weaknesses of DES versus alternatives like AES and triple DES
Multithreading
Multithreading allows an application to have multiple points of execution operating concurrently within the same memory space. Each point of execution is called a thread. Threads can run tasks concurrently, improving responsiveness. They share memory and can access resources simultaneously. Synchronization is needed when threads access shared data to prevent inconsistencies.
Wired and Wireless Examples in ns2
This document describes a wired network simulation with 4 nodes connected by links of varying bandwidth and delay. A TCP connection and FTP application are established between nodes n0 and n3, while a CBR traffic source runs over UDP between nodes n1 and n3. The simulation is run for 5 seconds, with the CBR starting at 0.1s and the FTP starting at 1s and stopping at 4s, and the CBR stopping at 4.5s. NAM is used to visualize the network traffic and queue sizes.
Glusterfs session #4 call frame and programming model
Glusterfs uses an asynchronous programming model where each component (xlator) calls into the next using STACK_WIND, passing a callback. The next xlator performs its task and then callbacks the original using STACK_UNWIND. This non-blocking approach prevents any xlator from blocking on network operations. Key data structures like the call_frame track the asynchronous call and callback between xlators, maintaining a stack. Debugging information within frames helps track errors like frame loss or stuck operations.
PERFORMANCE EVALUATION OF OPEN SHORTEST PATH FIRST VERSION 3 IN TERMS OF DATA...
Mobile Ad-Hoc Network (MANET) is a collection of computational devices that can be a
topology or a network for communication without any central device or base. MANET is the only
network that each device can be a host that worked like a router. There are three category of routing
protocol that can be broadly classified which is proactive, reactive and hybrid routing protocol.
The main goal for an ad hoc network routing protocol is to establish the best and efficient path
between a pair of devices. Besides, it also a challenge on how the routing protocol providing
consistent quality of service in wireless node. Therefore, providing the consistent quality of service
in network routing protocol is one of the crucial problem due to dynamic network topology because
of the nodes in the network are non-static and move randomly. This thesis investigates the
performance of Open Shortest Path First Version 3 (OSPFv3) in terms of data rate and number of
nodes. The performance metrics which is use to measured is throughput and packet delivery ratio.
To ensure that this project can be done, Objective Modular Network Testbed in C++ (OMNet++)
are used to be a simulator to stimulate the performance of OSPFv3.
Network Security Lec4
The document discusses the Data Encryption Standard (DES) and its encryption process. It then summarizes the Rijndael cipher, which was selected as the Advanced Encryption Standard (AES) in 2001. The AES uses a block cipher structure of iterative rounds involving byte substitution, shifting rows of bytes, mixing columns of bytes, and adding round keys.
Concurrency Programming in Java - 06 - Thread Synchronization, Liveness, Guar...
This session discusses about the basic building blocks of Concurrent Programming in Java, which include:
synchronisation part 2, synchronized methods, intrinsic locks, atomic access, liveness, deadlock, starvation, livelock, guarded blocks, immutable objects, synchronized class example, strategy for defining immutable objects
FOSDEM 2011 - 0MQ
1) The document discusses concurrency and the traditional model of sharing data between threads which leads to complexity, bugs, and diminishing returns.
2) It introduces the actor model from 1973 which uses message passing between isolated processes or "actors" to achieve concurrency without shared data.
3) ZeroMQ is presented as a modern implementation of the actor model, allowing applications to connect threads and processes across machines using messaging without locks or shared state.
INET for Starters
This document provides instructions for installing and using the INET framework for OMNeT++ simulations. It describes how to automatically or manually install INET, explore example simulations, familiarize yourself with OMNeT++, and create a new project using INET components. A wireless networking tutorial is presented that demonstrates creating a simple wireless network simulation by defining a topology and configuration file. The document also provides guidance on running the simulation and analyzing results using sequence charts and output visualization tools in the OMNeT++ IDE.
Fast dynamic analysis, Kostya Serebryany
This document discusses dynamic program analysis techniques for finding data races. It describes race detection theory including happens-before ordering and locksets. It then summarizes ThreadSanitizer, a dynamic race detector tool, and discusses techniques used to improve its performance, including a fast path state machine, parallelization, compiler instrumentation, and sampling. It also introduces AddressSanitizer, a new tool for detecting memory errors like use-after-free and out-of-bounds accesses using shadow memory and instrumentation.
Distributed file systems (from Google)
This document summarizes a lecture on distributed file systems. It discusses Network File System (NFS) and the Google File System (GFS). NFS allows remote access to files on servers and uses client caching for efficiency. GFS was designed for Google's need to redundantly store massive amounts of data on unreliable hardware. It uses large file chunks, replication for reliability, and a single master for coordination to provide high throughput for streaming reads of huge files.
Thread safety and code syncronization
Thread Safety is very important factor when implementing multithreaded applications. Code Synchronization helps in preventing multiple threads to access same code at a given time. This tutorial explains how Code synchronization works and i have explained how Object Locks work with multiple threads.
Download PPT and example : http://java9s.com/core-java/thread-sa...
facebook: http://facebook.com/java9s
twitter: http://twitter.com/java9s
Introduction to Exploitation
This chapter discusses vulnerability exploitation, including using tools like nmap scripts, Nessus, OpenVAS, Hydra, and Metasploit to identify and exploit vulnerabilities. It emphasizes obtaining tools from reliable sources, testing in a lab environment first, and explaining risks to the client. Metasploit is introduced as a framework for hundreds of exploits and payloads that can be used to deliver a "bomb" via a "bomber." The chapter demonstrates launching Metasploit, exploring exploits and payloads, specifying targets and payloads, executing exploits, and interacting with sessions.
Information and data security block cipher and the data encryption standard (...
Block ciphers like DES encrypt data in fixed-size blocks and use symmetric encryption keys. DES is a 64-bit block cipher that uses a 56-bit key. It employs a Feistel network structure with 16 rounds to provide diffusion and confusion of the plaintext block. Each round uses subkey-dependent substitution boxes and permutation functions. While DES was widely adopted, cryptanalysis techniques showed it could be broken with less than 256 tries, making the key size too short by modern standards.
Correct and efficient synchronization of java thread
This document discusses synchronization issues in multithreaded Java programs. It begins by establishing the audience and goals, which are to discuss subtleties of the Java memory model that surprised experts and provide guidelines for writing correct and efficient synchronized code. It then covers key topics like atomicity, visibility and ordering constraints imposed by synchronization. It provides examples of problems like the double-check idiom and non-volatile flags. It also examines performance costs of synchronization and alternatives like isolation in Swing. Guidelines emphasize only synchronizing shared data, avoiding lock contention, and using immutable/volatile fields when possible.
Des lecture
This document provides an overview of the Data Encryption Standard (DES) algorithm. It describes how DES was adopted as a standard in 1977, uses a 64-bit block size and 56-bit key, and has been widely used for encryption. The document outlines the key components of DES, including the initial permutation, round structure using substitution boxes and key schedule, as well as the decryption process. It notes that while DES was controversial due to its 56-bit key size, it exhibits good diffusion properties. However, it has been shown to be vulnerable to brute force and timing attacks in recent years.
DEC algorithm
DES (Data Encryption Standard) is a symmetric block cipher that uses a 56-bit key. It works by encrypting data blocks through 16 rounds of substitution and transposition. DES has several modes of operation including ECB (Electronic Code Book), CBC (Cipher Block Chaining), CFB (Cipher Feedback), OFB (Output Feedback), and CTR (Counter Mode). ECB encrypts each block independently, revealing patterns, while CBC chains blocks together using an initialization vector to add randomness. CFB and OFB allow encrypting smaller amounts of data. CTR operates independently without chaining blocks.
Enumeration
This document discusses service enumeration techniques including using Nmap to scan ports and grab login banners, using Telnet and Netcat to connect to services, and examining other areas like robots.txt files. It provides examples of running Nmap with -sV to view banners, using Telnet and Netcat to connect to ports 23 and 25, and examining robots.txt files to see exclusions for search engines. The document suggests these techniques can reveal information about services, versions, and other exposed details that could pose a risk if leaked.
Block Cipher
This document discusses different types of ciphers used for encryption. It describes stream ciphers that encrypt data bits using an XOR operation with a keystream. Block ciphers divide data into blocks and encrypt each block separately using keys and an initialization vector. Electronic Code Book (ECB) encryption uses the same key to encrypt each block, revealing patterns, while Cipher Block Chaining (CBC) XORs each plaintext block with the previous ciphertext block before encryption to provide more security.
10 Multicore 07
The document discusses multiprocessor and multicore systems. It defines multiprocessors as systems with two or more CPUs sharing full access to common RAM. It describes different hardware architectures for multiprocessors like bus-based, UMA, and NUMA systems. It discusses cache coherence protocols and issues like false sharing. It also covers scheduling and synchronization challenges in multiprocessor systems like load balancing, task assignment, and avoiding priority inversions.
Parallel Programming: Beyond the Critical Section
An introduction to parallel programming; from basic problems and parallel primitives to patterns and lock free programming.
More Related Content
What's hot
The Pillars Of Concurrency
The document discusses three pillars of concurrency:
1) Responsiveness and isolation through using background threads to avoid blocking the main UI thread.
2) Throughput and scalability by distributing work across multiple threads to maximize all available CPU cores.
3) Consistency by dealing with shared memory access across threads to prevent race conditions and deadlocks, such as through immutable objects, message passing, and transactional memory.
Class3
This document provides an overview of cryptography concepts including:
- Homework 1 is due on 1/18 and project 1 is due the next day
- It reviews classical ciphers, modern symmetric ciphers like DES, and basic cryptography terminology
- It describes the Feistel cipher structure used in DES, the DES algorithm details like key scheduling and rounds, and strengths and weaknesses of DES versus alternatives like AES and triple DES
Multithreading
Multithreading allows an application to have multiple points of execution operating concurrently within the same memory space. Each point of execution is called a thread. Threads can run tasks concurrently, improving responsiveness. They share memory and can access resources simultaneously. Synchronization is needed when threads access shared data to prevent inconsistencies.
Wired and Wireless Examples in ns2
This document describes a wired network simulation with 4 nodes connected by links of varying bandwidth and delay. A TCP connection and FTP application are established between nodes n0 and n3, while a CBR traffic source runs over UDP between nodes n1 and n3. The simulation is run for 5 seconds, with the CBR starting at 0.1s and the FTP starting at 1s and stopping at 4s, and the CBR stopping at 4.5s. NAM is used to visualize the network traffic and queue sizes.
Glusterfs session #4 call frame and programming model
Glusterfs uses an asynchronous programming model where each component (xlator) calls into the next using STACK_WIND, passing a callback. The next xlator performs its task and then callbacks the original using STACK_UNWIND. This non-blocking approach prevents any xlator from blocking on network operations. Key data structures like the call_frame track the asynchronous call and callback between xlators, maintaining a stack. Debugging information within frames helps track errors like frame loss or stuck operations.
PERFORMANCE EVALUATION OF OPEN SHORTEST PATH FIRST VERSION 3 IN TERMS OF DATA...
Mobile Ad-Hoc Network (MANET) is a collection of computational devices that can be a
topology or a network for communication without any central device or base. MANET is the only
network that each device can be a host that worked like a router. There are three category of routing
protocol that can be broadly classified which is proactive, reactive and hybrid routing protocol.
The main goal for an ad hoc network routing protocol is to establish the best and efficient path
between a pair of devices. Besides, it also a challenge on how the routing protocol providing
consistent quality of service in wireless node. Therefore, providing the consistent quality of service
in network routing protocol is one of the crucial problem due to dynamic network topology because
of the nodes in the network are non-static and move randomly. This thesis investigates the
performance of Open Shortest Path First Version 3 (OSPFv3) in terms of data rate and number of
nodes. The performance metrics which is use to measured is throughput and packet delivery ratio.
To ensure that this project can be done, Objective Modular Network Testbed in C++ (OMNet++)
are used to be a simulator to stimulate the performance of OSPFv3.
Network Security Lec4
The document discusses the Data Encryption Standard (DES) and its encryption process. It then summarizes the Rijndael cipher, which was selected as the Advanced Encryption Standard (AES) in 2001. The AES uses a block cipher structure of iterative rounds involving byte substitution, shifting rows of bytes, mixing columns of bytes, and adding round keys.
Concurrency Programming in Java - 06 - Thread Synchronization, Liveness, Guar...
This session discusses about the basic building blocks of Concurrent Programming in Java, which include:
synchronisation part 2, synchronized methods, intrinsic locks, atomic access, liveness, deadlock, starvation, livelock, guarded blocks, immutable objects, synchronized class example, strategy for defining immutable objects
FOSDEM 2011 - 0MQ
1) The document discusses concurrency and the traditional model of sharing data between threads which leads to complexity, bugs, and diminishing returns.
2) It introduces the actor model from 1973 which uses message passing between isolated processes or "actors" to achieve concurrency without shared data.
3) ZeroMQ is presented as a modern implementation of the actor model, allowing applications to connect threads and processes across machines using messaging without locks or shared state.
INET for Starters
This document provides instructions for installing and using the INET framework for OMNeT++ simulations. It describes how to automatically or manually install INET, explore example simulations, familiarize yourself with OMNeT++, and create a new project using INET components. A wireless networking tutorial is presented that demonstrates creating a simple wireless network simulation by defining a topology and configuration file. The document also provides guidance on running the simulation and analyzing results using sequence charts and output visualization tools in the OMNeT++ IDE.
Fast dynamic analysis, Kostya Serebryany
This document discusses dynamic program analysis techniques for finding data races. It describes race detection theory including happens-before ordering and locksets. It then summarizes ThreadSanitizer, a dynamic race detector tool, and discusses techniques used to improve its performance, including a fast path state machine, parallelization, compiler instrumentation, and sampling. It also introduces AddressSanitizer, a new tool for detecting memory errors like use-after-free and out-of-bounds accesses using shadow memory and instrumentation.
Distributed file systems (from Google)
This document summarizes a lecture on distributed file systems. It discusses Network File System (NFS) and the Google File System (GFS). NFS allows remote access to files on servers and uses client caching for efficiency. GFS was designed for Google's need to redundantly store massive amounts of data on unreliable hardware. It uses large file chunks, replication for reliability, and a single master for coordination to provide high throughput for streaming reads of huge files.
Thread safety and code syncronization
Thread Safety is very important factor when implementing multithreaded applications. Code Synchronization helps in preventing multiple threads to access same code at a given time. This tutorial explains how Code synchronization works and i have explained how Object Locks work with multiple threads.
Download PPT and example : http://java9s.com/core-java/thread-sa...
facebook: http://facebook.com/java9s
twitter: http://twitter.com/java9s
Introduction to Exploitation
This chapter discusses vulnerability exploitation, including using tools like nmap scripts, Nessus, OpenVAS, Hydra, and Metasploit to identify and exploit vulnerabilities. It emphasizes obtaining tools from reliable sources, testing in a lab environment first, and explaining risks to the client. Metasploit is introduced as a framework for hundreds of exploits and payloads that can be used to deliver a "bomb" via a "bomber." The chapter demonstrates launching Metasploit, exploring exploits and payloads, specifying targets and payloads, executing exploits, and interacting with sessions.
Information and data security block cipher and the data encryption standard (...
Block ciphers like DES encrypt data in fixed-size blocks and use symmetric encryption keys. DES is a 64-bit block cipher that uses a 56-bit key. It employs a Feistel network structure with 16 rounds to provide diffusion and confusion of the plaintext block. Each round uses subkey-dependent substitution boxes and permutation functions. While DES was widely adopted, cryptanalysis techniques showed it could be broken with less than 256 tries, making the key size too short by modern standards.
Correct and efficient synchronization of java thread
This document discusses synchronization issues in multithreaded Java programs. It begins by establishing the audience and goals, which are to discuss subtleties of the Java memory model that surprised experts and provide guidelines for writing correct and efficient synchronized code. It then covers key topics like atomicity, visibility and ordering constraints imposed by synchronization. It provides examples of problems like the double-check idiom and non-volatile flags. It also examines performance costs of synchronization and alternatives like isolation in Swing. Guidelines emphasize only synchronizing shared data, avoiding lock contention, and using immutable/volatile fields when possible.
Des lecture
This document provides an overview of the Data Encryption Standard (DES) algorithm. It describes how DES was adopted as a standard in 1977, uses a 64-bit block size and 56-bit key, and has been widely used for encryption. The document outlines the key components of DES, including the initial permutation, round structure using substitution boxes and key schedule, as well as the decryption process. It notes that while DES was controversial due to its 56-bit key size, it exhibits good diffusion properties. However, it has been shown to be vulnerable to brute force and timing attacks in recent years.
DEC algorithm
DES (Data Encryption Standard) is a symmetric block cipher that uses a 56-bit key. It works by encrypting data blocks through 16 rounds of substitution and transposition. DES has several modes of operation including ECB (Electronic Code Book), CBC (Cipher Block Chaining), CFB (Cipher Feedback), OFB (Output Feedback), and CTR (Counter Mode). ECB encrypts each block independently, revealing patterns, while CBC chains blocks together using an initialization vector to add randomness. CFB and OFB allow encrypting smaller amounts of data. CTR operates independently without chaining blocks.
Enumeration
This document discusses service enumeration techniques including using Nmap to scan ports and grab login banners, using Telnet and Netcat to connect to services, and examining other areas like robots.txt files. It provides examples of running Nmap with -sV to view banners, using Telnet and Netcat to connect to ports 23 and 25, and examining robots.txt files to see exclusions for search engines. The document suggests these techniques can reveal information about services, versions, and other exposed details that could pose a risk if leaked.
Block Cipher
This document discusses different types of ciphers used for encryption. It describes stream ciphers that encrypt data bits using an XOR operation with a keystream. Block ciphers divide data into blocks and encrypt each block separately using keys and an initialization vector. Electronic Code Book (ECB) encryption uses the same key to encrypt each block, revealing patterns, while Cipher Block Chaining (CBC) XORs each plaintext block with the previous ciphertext block before encryption to provide more security.
What's hot (20)
Glusterfs session #4 call frame and programming model
Glusterfs session #4 call frame and programming model
PERFORMANCE EVALUATION OF OPEN SHORTEST PATH FIRST VERSION 3 IN TERMS OF DATA...
PERFORMANCE EVALUATION OF OPEN SHORTEST PATH FIRST VERSION 3 IN TERMS OF DATA...
Concurrency Programming in Java - 06 - Thread Synchronization, Liveness, Guar...
Concurrency Programming in Java - 06 - Thread Synchronization, Liveness, Guar...
Information and data security block cipher and the data encryption standard (...
Information and data security block cipher and the data encryption standard (...
Correct and efficient synchronization of java thread
Correct and efficient synchronization of java thread
Similar to what every web and app developer should know about multithreading
10 Multicore 07
The document discusses multiprocessor and multicore systems. It defines multiprocessors as systems with two or more CPUs sharing full access to common RAM. It describes different hardware architectures for multiprocessors like bus-based, UMA, and NUMA systems. It discusses cache coherence protocols and issues like false sharing. It also covers scheduling and synchronization challenges in multiprocessor systems like load balancing, task assignment, and avoiding priority inversions.
Parallel Programming: Beyond the Critical Section
An introduction to parallel programming; from basic problems and parallel primitives to patterns and lock free programming.
The Windows Scheduler
An introduction to the Windows Scheduling algorithms with a discussion of its relevance to software developers.
Ruby thread safety first
1. There is no such thing as inherently thread-safe Ruby code as different Ruby implementations have different thread semantics.
2. Writing thread-safe code requires avoiding shared mutable state, and if needed, using concurrency primitives like Mutex and ConditionVariable to synchronize access to shared state.
3. Thoroughly testing concurrency involves testing with different Ruby implementations, a large number of threads, and synchronization patterns for precision.
Google: Cluster computing and MapReduce: Introduction to Distributed System D...
This document provides an overview of a distributed computing seminar. The seminar covers 5 lectures including an introduction to distributed computing, MapReduce and GFS, and algorithms for distributed computing. It discusses how distributed computing allows larger problems to be solved by splitting work across multiple computers. Key challenges include parallelizing work, synchronizing access to shared resources, and networking between machines. Synchronization techniques like semaphores and condition variables are introduced to coordinate parallel threads.
4.Process.ppt
The document discusses processes and threads in distributed systems. It defines threads as lightweight processes that share resources like memory space and files. Threads can run concurrently and be scheduled independently while processes are scheduled independently. The document covers thread usage models and advantages as well as design issues like mutexes for thread synchronization. It also discusses implementing threads in userspace versus the kernel.
Hoard: A Scalable Memory Allocator for Multithreaded Applications
Fast and effective memory management is crucial for many applications, including web servers, database managers, and scientific codes. However, current memory managers do not provide adequate support for these applications on modern architectures, severely limiting their performance, scalability, and robustness.
In this talk, I describe how to design memory managers that support high-performance applications. I first address the software engineering challenges of building efficient memory managers. I then show how current general-purpose memory managers do not scale on multiprocessors, cause false sharing of heap objects, and systematically leak memory. I describe a fast, provably scalable general-purpose memory manager called Hoard (available at www.hoard.org) that solves these problems, improving performance by up to a factor of 60.
slides8 SharedMemory.ppt
This document discusses programming with shared memory in parallel programming. It begins by explaining shared memory multiprocessor systems and how shared memory programming allows data to be accessible by all processors. It then discusses several methods for programming shared memory systems, including using threads and OpenMP. The bulk of the document focuses on explaining OpenMP directives for parallel programming, including how to specify parallel regions, work sharing constructs like for loops and sections, and synchronization methods like barriers and critical sections.
Multithreading and concurrency in android
Here you will learn -
What is Multithreading
What is concurrency
Process Vs Thread
Improvements and issues with concurrency
Limits of concurrency gains
Concurrency issues
Threads pools with the Executor Framework
AsyncTask and the UI Thread
Code
Concurrency and parallel in .net
The document discusses various topics related to concurrency and parallelism including threads, shared state, locks, asynchronous programming, parallel processing, and reactive programming. It provides examples of using locks, reader-writer locks, thread pools, tasks, and reactive streams. It also covers challenges with concurrent programming such as race conditions, deadlocks, and debugging concurrent applications.
Here comes the Loom - Ya!vaConf.pdf
At a time when Herbt Sutter announced to everyone that the free lunch is over (The Free Lunch Is Over: A Fundamental Turn Toward Concurrency in Software), concurrency has become our everyday life.A big change is coming to Java, the Loom project and with it such new terms as "virtual thread", "continuations" and "structured concurrency". If you've been wondering what they will change in our daily work or
whether it's worth rewriting your Tomcat-based application to super-efficient reactive Netty,or whether to wait for Project Loom? This presentation is for you.
I will talk about the Loom project and the new possibilities related to virtual wattles and "structured concurrency". I will tell you how it works and what can be achieved and the impact on performance
MultiThreading in Python
This Slide talks about multithreading in python with sample code snippets.
Connect me at
https://nextsrini.blogspot.com/
https://www.youtube.com/channel/UCqIHkbuf1uGiN8QXwWX5dkQ
Adsa u4 ver 1.0
This document describes revisions made to a document on shared objects and concurrent objects. It lists 6 revisions by Dr. C.V. Suresh Babu between 5/12/2013 and an edited version 2.0. It then provides sections on shared objects and synchronization, properties of mutual exclusion including the producer-consumer problem and readers-writers problem, realities of parallelization, mutual exclusion, thread solutions, bounded timestamps, concurrent objects, linearizability, and the Java memory model.
Distributed Coordination
Counting and sorting are basic tasks that distributed systems rely on. The document discusses different approaches for distributed counting and sorting, including software combining trees, counting networks, and sorting networks. Counting networks like bitonic and periodic networks have depth of O(log2w) where w is the network width. Sorting networks can sort in the same time complexity by exploiting an isomorphism between counting and sorting networks. Sample sorting is also discussed as a way to sort large datasets across multiple threads.
MERIMeeting du 27 mai 2014 - Parallel Programming
This document summarizes a presentation on parallel programming in .NET. It introduces parallel programming and why it is useful for performing work faster and creating responsive user interfaces. It discusses common issues like deadlocks and race conditions. It then covers different techniques for parallel programming in C#, including using threads, thread pools, tasks, Parallel class, async programming, and PLINQ. It also discusses synchronization techniques like locks, mutexes, and signaling with wait/pulse and barriers. Finally, it discusses storing shared items and provides an overview of thread-safe collection classes in .NET.
Lec1 Intro
The document provides an introduction to distributed computing and systems, covering topics such as parallel vs distributed computing, a brief history of distributed computing, parallelization and synchronization challenges, networking basics including sockets and ports, and conclusions about using more machines to process more data which requires synchronization across processes and consideration of networking topology.
Lec1 Intro
The document provides an introduction to distributed computing and systems, covering topics such as parallel vs distributed computing, a brief history of distributed computing, parallelization and synchronization challenges, networking basics including sockets and ports, and conclusions about using more machines to process more data which requires synchronization across processes and consideration of networking topology.
MySQL 5.7 clustering: The developer perspective
(Compiled from revised slides of previous presentations - skip if you know the old presentations)
A summary on clustering MySQL 5.7 with focus on the PHP clients view and the PHP driver. Which kinds on MySQL clusters are there, what are their goal, how does wich one scale, what extra work does which clustering technique put at the client and finally, how the PHP driver (PECL/mysqlnd_ms) helps you.
Hs java open_party
This document discusses techniques for writing highly scalable Java programs for multi-core systems. It begins with an overview of hardware trends showing an increasing number of cores per chip. It then discusses profiling tools that can identify lock contention issues. The document provides best practices for Java programming including reducing locking scope, splitting locks, stripping locks, using atomic variables, and lock-free algorithms. It emphasizes using concurrent containers and immutable/thread-local data where possible.
Threading.pptx
This document introduces threads as a fundamental unit of CPU utilization that forms the basis of multithreaded computer systems. It examines issues related to multithreaded programming and compares single and multithreaded processes. Threads within a process share code, data and heap sections but have their own stack segments. Context switching is cheaper between threads of the same process than between processes. Threads allow overlapping computation and I/O to improve performance.
Similar to what every web and app developer should know about multithreading (20)
Google: Cluster computing and MapReduce: Introduction to Distributed System D...
Google: Cluster computing and MapReduce: Introduction to Distributed System D...
Hoard: A Scalable Memory Allocator for Multithreaded Applications
Hoard: A Scalable Memory Allocator for Multithreaded Applications
Recently uploaded
Trusted Execution Environment for Decentralized Process Mining
Presentation of the paper "Trusted Execution Environment for Decentralized Process Mining" given during the CAiSE 2024 Conference in Cyprus on June 7, 2024.
Monitoring and Managing Anomaly Detection on OpenShift.pdf
Monitoring and Managing Anomaly Detection on OpenShift
Overview
Dive into the world of anomaly detection on edge devices with our comprehensive hands-on tutorial. This SlideShare presentation will guide you through the entire process, from data collection and model training to edge deployment and real-time monitoring. Perfect for those looking to implement robust anomaly detection systems on resource-constrained IoT/edge devices.
Key Topics Covered
1. Introduction to Anomaly Detection
- Understand the fundamentals of anomaly detection and its importance in identifying unusual behavior or failures in systems.
2. Understanding Edge (IoT)
- Learn about edge computing and IoT, and how they enable real-time data processing and decision-making at the source.
3. What is ArgoCD?
- Discover ArgoCD, a declarative, GitOps continuous delivery tool for Kubernetes, and its role in deploying applications on edge devices.
4. Deployment Using ArgoCD for Edge Devices
- Step-by-step guide on deploying anomaly detection models on edge devices using ArgoCD.
5. Introduction to Apache Kafka and S3
- Explore Apache Kafka for real-time data streaming and Amazon S3 for scalable storage solutions.
6. Viewing Kafka Messages in the Data Lake
- Learn how to view and analyze Kafka messages stored in a data lake for better insights.
7. What is Prometheus?
- Get to know Prometheus, an open-source monitoring and alerting toolkit, and its application in monitoring edge devices.
8. Monitoring Application Metrics with Prometheus
- Detailed instructions on setting up Prometheus to monitor the performance and health of your anomaly detection system.
9. What is Camel K?
- Introduction to Camel K, a lightweight integration framework built on Apache Camel, designed for Kubernetes.
10. Configuring Camel K Integrations for Data Pipelines
- Learn how to configure Camel K for seamless data pipeline integrations in your anomaly detection workflow.
11. What is a Jupyter Notebook?
- Overview of Jupyter Notebooks, an open-source web application for creating and sharing documents with live code, equations, visualizations, and narrative text.
12. Jupyter Notebooks with Code Examples
- Hands-on examples and code snippets in Jupyter Notebooks to help you implement and test anomaly detection models.
Your One-Stop Shop for Python Success: Top 10 US Python Development Providers
Simplify your search for a reliable Python development partner! This list presents the top 10 trusted US providers offering comprehensive Python development services, ensuring your project's success from conception to completion.
Best 20 SEO Techniques To Improve Website Visibility In SERP
Boost your website's visibility with proven SEO techniques! Our latest blog dives into essential strategies to enhance your online presence, increase traffic, and rank higher on search engines. From keyword optimization to quality content creation, learn how to make your site stand out in the crowded digital landscape. Discover actionable tips and expert insights to elevate your SEO game.
Digital Marketing Trends in 2024 | Guide for Staying Ahead
https://www.wask.co/ebooks/digital-marketing-trends-in-2024
Feeling lost in the digital marketing whirlwind of 2024? Technology is changing, consumer habits are evolving, and staying ahead of the curve feels like a never-ending pursuit. This e-book is your compass. Dive into actionable insights to handle the complexities of modern marketing. From hyper-personalization to the power of user-generated content, learn how to build long-term relationships with your audience and unlock the secrets to success in the ever-shifting digital landscape.
Azure API Management to expose backend services securely
How to use Azure API Management to expose backend service securely
FREE A4 Cyber Security Awareness Posters-Social Engineering part 3
Free A4 downloadable and printable Cyber Security, Social Engineering Safety and security Training Posters . Promote security awareness in the home or workplace. Lock them Out From training providers datahops.com
Astute Business Solutions | Oracle Cloud Partner |
Your goto partner for Oracle Cloud, PeopleSoft, E-Business Suite, and Ellucian Banner. We are a firm specialized in managed services and consulting.
A Comprehensive Guide to DeFi Development Services in 2024
DeFi represents a paradigm shift in the financial industry. Instead of relying on traditional, centralized institutions like banks, DeFi leverages blockchain technology to create a decentralized network of financial services. This means that financial transactions can occur directly between parties, without intermediaries, using smart contracts on platforms like Ethereum.
In 2024, we are witnessing an explosion of new DeFi projects and protocols, each pushing the boundaries of what’s possible in finance.
In summary, DeFi in 2024 is not just a trend; it’s a revolution that democratizes finance, enhances security and transparency, and fosters continuous innovation. As we proceed through this presentation, we'll explore the various components and services of DeFi in detail, shedding light on how they are transforming the financial landscape.
At Intelisync, we specialize in providing comprehensive DeFi development services tailored to meet the unique needs of our clients. From smart contract development to dApp creation and security audits, we ensure that your DeFi project is built with innovation, security, and scalability in mind. Trust Intelisync to guide you through the intricate landscape of decentralized finance and unlock the full potential of blockchain technology.
Ready to take your DeFi project to the next level? Partner with Intelisync for expert DeFi development services today!
GraphRAG for Life Science to increase LLM accuracy
GraphRAG for life science domain, where you retriever information from biomedical knowledge graphs using LLMs to increase the accuracy and performance of generated answers
leewayhertz.com-AI in predictive maintenance Use cases technologies benefits ...
Predictive maintenance is a proactive approach that anticipates equipment failures before they happen. At the forefront of this innovative strategy is Artificial Intelligence (AI), which brings unprecedented precision and efficiency. AI in predictive maintenance is transforming industries by reducing downtime, minimizing costs, and enhancing productivity.
Dandelion Hashtable: beyond billion requests per second on a commodity server
This slide deck presents DLHT, a concurrent in-memory hashtable. Despite efforts to optimize hashtables, that go as far as sacrificing core functionality, state-of-the-art designs still incur multiple memory accesses per request and block request processing in three cases. First, most hashtables block while waiting for data to be retrieved from memory. Second, open-addressing designs, which represent the current state-of-the-art, either cannot free index slots on deletes or must block all requests to do so. Third, index resizes block every request until all objects are copied to the new index. Defying folklore wisdom, DLHT forgoes open-addressing and adopts a fully-featured and memory-aware closed-addressing design based on bounded cache-line-chaining. This design offers lock-free index operations and deletes that free slots instantly, (2) completes most requests with a single memory access, (3) utilizes software prefetching to hide memory latencies, and (4) employs a novel non-blocking and parallel resizing. In a commodity server and a memory-resident workload, DLHT surpasses 1.6B requests per second and provides 3.5x (12x) the throughput of the state-of-the-art closed-addressing (open-addressing) resizable hashtable on Gets (Deletes).
AWS Cloud Cost Optimization Presentation.pptx
This presentation provides valuable insights into effective cost-saving techniques on AWS. Learn how to optimize your AWS resources by rightsizing, increasing elasticity, picking the right storage class, and choosing the best pricing model. Additionally, discover essential governance mechanisms to ensure continuous cost efficiency. Whether you are new to AWS or an experienced user, this presentation provides clear and practical tips to help you reduce your cloud costs and get the most out of your budget.
HCL Notes und Domino Lizenzkostenreduzierung in der Welt von DLAU
Webinar Recording: https://www.panagenda.com/webinars/hcl-notes-und-domino-lizenzkostenreduzierung-in-der-welt-von-dlau/
DLAU und die Lizenzen nach dem CCB- und CCX-Modell sind für viele in der HCL-Community seit letztem Jahr ein heißes Thema. Als Notes- oder Domino-Kunde haben Sie vielleicht mit unerwartet hohen Benutzerzahlen und Lizenzgebühren zu kämpfen. Sie fragen sich vielleicht, wie diese neue Art der Lizenzierung funktioniert und welchen Nutzen sie Ihnen bringt. Vor allem wollen Sie sicherlich Ihr Budget einhalten und Kosten sparen, wo immer möglich. Das verstehen wir und wir möchten Ihnen dabei helfen!
Wir erklären Ihnen, wie Sie häufige Konfigurationsprobleme lösen können, die dazu führen können, dass mehr Benutzer gezählt werden als nötig, und wie Sie überflüssige oder ungenutzte Konten identifizieren und entfernen können, um Geld zu sparen. Es gibt auch einige Ansätze, die zu unnötigen Ausgaben führen können, z. B. wenn ein Personendokument anstelle eines Mail-Ins für geteilte Mailboxen verwendet wird. Wir zeigen Ihnen solche Fälle und deren Lösungen. Und natürlich erklären wir Ihnen das neue Lizenzmodell.
Nehmen Sie an diesem Webinar teil, bei dem HCL-Ambassador Marc Thomas und Gastredner Franz Walder Ihnen diese neue Welt näherbringen. Es vermittelt Ihnen die Tools und das Know-how, um den Überblick zu bewahren. Sie werden in der Lage sein, Ihre Kosten durch eine optimierte Domino-Konfiguration zu reduzieren und auch in Zukunft gering zu halten.
Diese Themen werden behandelt
- Reduzierung der Lizenzkosten durch Auffinden und Beheben von Fehlkonfigurationen und überflüssigen Konten
- Wie funktionieren CCB- und CCX-Lizenzen wirklich?
- Verstehen des DLAU-Tools und wie man es am besten nutzt
- Tipps für häufige Problembereiche, wie z. B. Team-Postfächer, Funktions-/Testbenutzer usw.
- Praxisbeispiele und Best Practices zum sofortigen Umsetzen
SAP S/4 HANA sourcing and procurement to Public cloud
SAP S4 HANA to Public cloud data object differences
Programming Foundation Models with DSPy - Meetup Slides
Prompting language models is hard, while programming language models is easy. In this talk, I will discuss the state-of-the-art framework DSPy for programming foundation models with its powerful optimizers and runtime constraint system.
zkStudyClub - LatticeFold: A Lattice-based Folding Scheme and its Application...
Folding is a recent technique for building efficient recursive SNARKs. Several elegant folding protocols have been proposed, such as Nova, Supernova, Hypernova, Protostar, and others. However, all of them rely on an additively homomorphic commitment scheme based on discrete log, and are therefore not post-quantum secure. In this work we present LatticeFold, the first lattice-based folding protocol based on the Module SIS problem. This folding protocol naturally leads to an efficient recursive lattice-based SNARK and an efficient PCD scheme. LatticeFold supports folding low-degree relations, such as R1CS, as well as high-degree relations, such as CCS. The key challenge is to construct a secure folding protocol that works with the Ajtai commitment scheme. The difficulty, is ensuring that extracted witnesses are low norm through many rounds of folding. We present a novel technique using the sumcheck protocol to ensure that extracted witnesses are always low norm no matter how many rounds of folding are used. Our evaluation of the final proof system suggests that it is as performant as Hypernova, while providing post-quantum security.
Paper Link: https://eprint.iacr.org/2024/257
TrustArc Webinar - 2024 Global Privacy Survey
How does your privacy program stack up against your peers? What challenges are privacy teams tackling and prioritizing in 2024?
In the fifth annual Global Privacy Benchmarks Survey, we asked over 1,800 global privacy professionals and business executives to share their perspectives on the current state of privacy inside and outside of their organizations. This year’s report focused on emerging areas of importance for privacy and compliance professionals, including considerations and implications of Artificial Intelligence (AI) technologies, building brand trust, and different approaches for achieving higher privacy competence scores.
See how organizational priorities and strategic approaches to data security and privacy are evolving around the globe.
This webinar will review:
- The top 10 privacy insights from the fifth annual Global Privacy Benchmarks Survey
- The top challenges for privacy leaders, practitioners, and organizations in 2024
- Key themes to consider in developing and maintaining your privacy program
Recently uploaded (20)
Trusted Execution Environment for Decentralized Process Mining
Trusted Execution Environment for Decentralized Process Mining
Monitoring and Managing Anomaly Detection on OpenShift.pdf
Monitoring and Managing Anomaly Detection on OpenShift.pdf
Your One-Stop Shop for Python Success: Top 10 US Python Development Providers
Your One-Stop Shop for Python Success: Top 10 US Python Development Providers
Best 20 SEO Techniques To Improve Website Visibility In SERP
Best 20 SEO Techniques To Improve Website Visibility In SERP
Digital Marketing Trends in 2024 | Guide for Staying Ahead
Digital Marketing Trends in 2024 | Guide for Staying Ahead
Azure API Management to expose backend services securely
Azure API Management to expose backend services securely
FREE A4 Cyber Security Awareness Posters-Social Engineering part 3
FREE A4 Cyber Security Awareness Posters-Social Engineering part 3
Astute Business Solutions | Oracle Cloud Partner |
Astute Business Solutions | Oracle Cloud Partner |
A Comprehensive Guide to DeFi Development Services in 2024
A Comprehensive Guide to DeFi Development Services in 2024
Deep Dive: AI-Powered Marketing to Get More Leads and Customers with HyperGro...
Deep Dive: AI-Powered Marketing to Get More Leads and Customers with HyperGro...
GraphRAG for Life Science to increase LLM accuracy
GraphRAG for Life Science to increase LLM accuracy
leewayhertz.com-AI in predictive maintenance Use cases technologies benefits ...
leewayhertz.com-AI in predictive maintenance Use cases technologies benefits ...
Dandelion Hashtable: beyond billion requests per second on a commodity server
Dandelion Hashtable: beyond billion requests per second on a commodity server
HCL Notes und Domino Lizenzkostenreduzierung in der Welt von DLAU
HCL Notes und Domino Lizenzkostenreduzierung in der Welt von DLAU
WeTestAthens: Postman's AI & Automation Techniques
WeTestAthens: Postman's AI & Automation Techniques
SAP S/4 HANA sourcing and procurement to Public cloud
SAP S/4 HANA sourcing and procurement to Public cloud
Programming Foundation Models with DSPy - Meetup Slides
Programming Foundation Models with DSPy - Meetup Slides
zkStudyClub - LatticeFold: A Lattice-based Folding Scheme and its Application...
zkStudyClub - LatticeFold: A Lattice-based Folding Scheme and its Application...
what every web and app developer should know about multithreading
- 1. what every web and app developer should know about multithreading
- 2. why
- 9. threads
- 18. synchronization Thread A Thread B Main Thread Start A Start B Join A and B Read data
- 26. example
- 27. example
- 28. example
- 29. example
- 30. bad threading
- 33. photo credits CC BY-NC-ND 2.0 – Clemens Schwaighofer – http://flickr.com/photos/gullevek/257135337/ CC BY-NC-SA 2.0 – Robert Parviainen – http://flickr.com/photos/rtv/2574427997/ CC BY-NC-ND 2.0 – Sudhir Srinivasa – http://flickr.com/photos/sudhirs/111760673/ CC BY-NC-SA 2.0 – Rick Harrison – http://flickr.com/photos/sovietuk/2657691123/ CC BY-NC-ND 2.0 – Joe Chiapputo – http://flickr.com/photos/cocoabeachjoe/1924133031/ CC BY-ND 2.0 – Craig Allen – http://flickr.com/photos/anabadili/2759448841/
Editor's Notes
- By-nc-nd 2.0 Clemens Schwaighofer http://flickr.com/photos/gullevek/257135337/ Introduction to threading Time for questions at the end; if it’s really brief, interrupt me