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Great Reads

Transmission Line Matrix for Acoustic Simulations

by Kenneth Haugland

Implementation and theory behind TLM modelling for acoustic wave propagation with 2D and 3D view. Also includes a raindrop and boat wake simulation.

Tasks/Continuations and Death of the ThreadPool?

by Sacha Barber

Using the VS2010 Tasks namespace.

Parallel Scalable Burrows-Wheeler Transformation (BWT) Using Intel® Threading Building Blocks and OpenMP Libraries

by Arthur V. Ratz

This article is a practical guide on using Intel® Threading Building Blocks (TBB) and OpenMP libraries for C++ based on the example of delivering parallel scalable code that implements Burrows-Wheeler Transformation (BWT) algorithm.

Parallel Port Control with C# .NET 2.0

by Arman Aşçı

Parallel port data register control with C# .NET 2.0 and inpout32.dll.

Latest Articles

Capturing Data from a Tektronix 1230 Logic Analyzer by Emulating a Parallel Port Printer

by ToughDev

Emulate parallel port printer to capture data from Tektronix 1230 Logic Analyzer

Set up PHP QA tools and control them via make [Tutorial Part 5]

by PascalLandau

In the fifth part of this tutorial series on developing PHP on Docker we will setup some PHP code quality tools and provide a convenient way to control them via GNU make.

Duplicate songs detector via audio fingerprinting

by Ciumac Sergiu

Explains sound fingerprinting algorithm, with a practical example of detecting duplicate files on the user's local drive.

Programming Concurrency in C++: Part 2

by MehreenTahir

This article is a continuation of Programming Concurrency in C++ Part 1. We will discuss synchronization, future and promises along with async and with that, will sum up the introduction of concurrency in C++.

All Articles

Parallel

.NET asynchrony in the UI context

21 Nov 2011 by dmihailescu

UI and concurrent programming using IAsyncResult, BackgroundWorker, TPL, and ‘async’ syntax.

.Net concurrent Tasks

13 Dec 2011 by Freeboss

Hi, I am looking for a way to set a Fixed concurrent tasks number..As far as i know Task.Factory does not have anything like and i'm stuck.I've also though about the BlockingCollection and the Producer-Consumer model but i'm not sure if this is the right implementation as i have about...

.Net concurrent Tasks

13 Dec 2011 by E.F. Nijboer

Have a look at the ThreadPool class and TaskScheduler class. And... I think the third link might be a good example of what you are looking...

3 proplems for arena sim.

26 Feb 2015 by Sergey Alexandrovich Kryukov

It looks like you copy and paste some assignments. This is not a question, this is pure abuse. No wonder, it will be automatically removed due to abuse reports. Don't do such things.—SA

7-Segment Display Multiplexing Control with Parallel Port and x86 Assembly

15 Aug 2012 by Arman Aşçı

Time division multiplexing between 6 x 7-Segment displays control with Parallel Port and x86 assembly.

A Brief Test on the Code Efficiency of CUDA and Thrust

27 Jun 2010 by Wayne Wood

Verify the execution efficiency of a short CUDA program when using the library thrust

A Brief Test on the Efficiency of a .NET 4.0 Parallel Code Example

1 Jul 2010 by Wayne Wood

Verify the execution efficiency of a series of short .NET 4.0 parallel programming samples

A Generic Class for Wrapping Asynchronous Begin/End Operations, Using Reactive Extensions for .NET (Rx)

3 Feb 2010 by User 4677916

This article presents a reusable class and technique for easily doing Asynchronous Programming using the Begin/End Pattern and the new Reactive Extensions for .NET (Rx) library.

A Parallel Class Study: Bi-Conjugate Gradient Stabilized

3 Dec 2018 by Amir Emamjomeh

A study of .NET Parallel Class in solving a system of linear equations using bi-conjugate gradient stabilized method

Advantage Multicore over Multithread in core i7

15 Jun 2012 by shankha2010

Hi All, After reading about parallel programming by multicore processor,I have some doubts. Its undoubtedly best idea for play stations,X-Box [as they have soo... many cores] But will it prove to be effective for core i7 running 8 parallel process then running 100 thread in Windows...

multi-threading

Advantage Multicore over Multithread in core i7

15 Jun 2012 by Stephen Hewison

More cores quite simply means you can do more at any one time. Most cores also support threading. Processors work using something called the fetch execute cycle. This cycle has 4 stages and it's possible for 4 separate threads to work within a single processor as each one exists within each...

multi-threading

Advantage Multicore over Multithread in core i7

15 Jun 2012 by enhzflep

Gday, I'm not so sure I understand each of your points and your questions - though I'll do what I can to address them.XBox, PS3 actually only have a couple of cores, like PCs. PS3 - 8 for the cell, 6 as implemented in ps3 variants.Xbox360 - 3 for the PowerPC XenonJust like PCs, the...

multi-threading

An interview with Henry Gabb at Intel.

5 Nov 2017 by Chris Maunder, Henry Gabb

A rambling chat about parallelization, vectorization, Intel® Parallel Studio XE and how sometimes you really need to trust the tools you use.

parallel-processing

Any link for driver EPSONTM-P2.01 for win7 64bit

7 Oct 2021 by User 9916080

This maybe what you are looking for. From Google: Epson TM-T88III Drivers[^]

Asynchronous parallel tasks not working

7 Aug 2014 by Yannick Brodard

So I have this command :public DelegateCommand GenerateReportForAllClientsCommand { get; set; }public bool CanExecuteGenerateReportForAllClients(){ return true;}public async void GenerateReportForAllClientsExecute(){ if (ClientList.Count

Asynchronous parallel tasks not working

10 Aug 2014 by Yannick Brodard

By searching the web, I found a convenient answer to my problem.I had an other async / await in my GeneratePdfReportAsync method, and I've discovered that a Task or Task object need the UI Thread to be available. But in this case for this method, I didn't need the UI Thread, but it was...

Asynchronous Programming in .NET with QnA

9 Apr 2015 by Girish J Jain

In this post, I am going to talk about asynchronous programming in Microsoft .NET Framework in the form of questions and answer.

Asynchronous Programming in .NET – Task-based Asynchronous Pattern (TAP)

5 Jun 2018 by Nikola M. Živković

Task based asynchronous pattern in .NET

Asynchronously run a DB intensive application with dynamic data sources

19 Oct 2011 by DANAOS_master

Hi folks,we have a dashboard application that presents data according to dynamically executed SQL read from a database.Up to now application connects to the database, loops against the grids (that present data), reads their SQL source, executes the SQL, presents the results in...

Asynchronously run a DB intensive application with dynamic data sources

21 Oct 2011 by Ezra Neil

Reading at your question, the first thing that come to my mind is multi-threading. Backgroundworker is threading too but you cannot effectively have more than one threads at a time.Create your own threads and by doing this you can dynamically add more threads as needed. Creating own threads...

Await Tasks in C#4 using Iterators

29 Aug 2013 by Keith L Robertson

Write synchronous-looking asynchronous methods without async/await in Visual Studio 2010.

Backgroung worker C# .Net 4

21 Sep 2013 by shehrozeee

I have a question.If I use a backgroungworker provided in .Net to do some intensive work, will it run on on the same core (I have a quad-core machine) as the parent thread (main thread that created this background worker)?If I make about 5-10 background workers will they start on different...

Backgroung worker C# .Net 4

22 Sep 2013 by OriginalGriff

Your questions, in order:Maybe.Possibly.Probably not.Yes.Yes.Yes.If you have N cores, then N threads can truly run in parallel (provided they do not want to access the same resources, including memory objects). However, not all the threads in the system are yours - yours will...

Backgroung worker C# .Net 4

22 Sep 2013 by Sergey Alexandrovich Kryukov

First of all, you need to create multiple threads only if your need parallel independent processing logic dictated by the semantic of your application. If you hope to improve performance using threads, you well make it only worse if the number of threads exceed the number of cores. Remember that...

Backgroung worker C# .Net 4

22 Sep 2013 by Mike Meinz

See Solution 1 of Database connection every 1000 milliseconds by Timer interval problem[^]When I originally developed this application, it accessed nine different servers one at a time using Web Services to gather data. That took about ten minutes. When I changed my software so that it...

Best way to access ports using C++ under windows 10 ?

17 Aug 2017 by Member 12915728

Please share info on how to functionally access ports in Windows 10 using C++ (compiled with g++). Please include all #include files and code necessary to test I/O Parallel Port Pin Programming. Thank you What I have tried: /*** Following Code Compiles but DOES NOT modify ports ***/ ...

Best way to access ports using C++ under windows 10 ?

17 Aug 2017 by KarstenK

I personally prefer other API like WriteFile which also works with COM ports. The link is good starting point to get an overview with some links to sample code. Take also a look at this great article about Serial library for C++.

C# - how to run 5 tasks in parallel

23 Jan 2018 by akash_waits

Hi All, I am using the below code to Call 5 methods in Parallel and then waiting to received response from all the methods before proceeding further. Task t1 = Task.Factory.StartNew(() => LookUp1(lookUpObj)); //09:28:41.594538 Task t2 =...

C# - how to run 5 tasks in parallel

23 Jan 2018 by OriginalGriff

Threading is complicated, because it's non-deterministic when exactly thread runs, and how long they run for. The "problem" is that each thread requires a core to run on: so the more cores your processor has, the more thread it can actually run at the same time. If you have two cores, then only...

C# - How to run multiple tasks on specific multiple cores/processors simultaneously/synchronously

30 Jun 2021 by Member 10052408

Hi All,I have multiple tasks and i need to run them on specific multiple cores or processors simultaneously. For Example, if i have two different tasks or just one task but will run it twice i want to run these two tasks on specific cores or processors simultaneously like task1 will...

C# - How to run multiple tasks on specific multiple cores/processors simultaneously/synchronously

19 Mar 2014 by Sergey Alexandrovich Kryukov

Let me give you a really short introduction.You can use threads in a way abstracted from the CPU cores. And the OS associates cores with threads using its own. In almost all cases, this is the very best option. I would not recommend touching process and thread affinity at all. The cases when...

C# - How to run multiple tasks on specific multiple cores/processors simultaneously/synchronously

19 Mar 2014 by Yandy Zaldivar

Hi, I am going to give you two solution and you choose one or another depending in your needs. I didn't use your code demo as a guide but the text of your question.- Choose the ThreadApproach if you want to have explicit control over the thread that will run your task including the processor...

C# - How to run multiple tasks on specific multiple cores/processors simultaneously/synchronously

21 Mar 2014 by Member 10052408

I tried both methods , threadapproach and taskapproach, but i couldnt get two or more tasks start to run simultaneously because when i check cpu utilization, i see that only one of the specific processors is working with 100%, but what i want is two or more specific processors should work with...

C# - How to run multiple tasks on specific multiple cores/processors simultaneously/synchronously

25 Mar 2014 by Yandy Zaldivar

Hi, the problem in your design is that you are using a Processor level Affinity Mask. If you set if to 2, then all your threads will run on processor 2 and if you set it to 3, then all your threads will run on processor 3.If you want that thread 1 run on processor 2 and thread 2 run on...

C++11 Concurrency

30 Dec 2014 by Babu_Abdulsalam

Various features supporting Concurrency in C++11

multi-threading

Calculate eigen value and eigen vector in MPI

18 Apr 2017 by Bhola Ram Sahu

I want to do a small program that calculates eigen value and eigen vector in parallel processors using MPI. I have written a code that works correctly but its for uni processor. Please help me with some code for parallel processor. I want to compare the processing time for different number of...

Calling same method with different parameters - How to use multithreading / parallel class?

18 Jan 2013 by SandhyaPillai

Here is the scenario: I have a dll which has method that gets data from db, depending on parameters passed, does various checks and gives me required data.GetGOS_ForBill(AgencyCode)In a windows application, I have listbox which list 500 + agencies. I retrieve GOS for each agency append to a...

multi-threading

Calling same method with different parameters - How to use multithreading / parallel class?

18 Jan 2013 by OriginalGriff

Multithreading or parallel may or may not speed things up - it can actually slow things down because of the processing overhead in setting up the thread / tasks and allocating separate memory space for them. In addition it depends what else is going on - if each thread needs to talk to SQL then...

multi-threading

Capture Data from Printer Spooler (Serial, Parallel, or USB)

28 Oct 2013 by Member 10365929

Looking for a way to read and extract data from printer spooler - basic text.Printer is connected via parallel or usb or serial.Please help!

Capturing Data from a Tektronix 1230 Logic Analyzer by Emulating a Parallel Port Printer

8 May 2023 by ToughDev

Emulate parallel port printer to capture data from Tektronix 1230 Logic Analyzer

Capturing Data from Parallel Port

18 Dec 2013 by Member 10474952

Hello All - I am looking to capture ascii data from a parallel port output from a machine - this device is not a pc - but it is collecting datat & printing a table of numbers to an epson lx300+ printer - Can anyone help me devise a solution to this problem ? Thanks in advance Marty

21 Aug 2009 by User 5271454

Utilizing the CCR to manage and execute plug-ins.

CCRing

29 Oct 2008 by User 5271454

Sequential Asynchronous logging example using the CCR

Compare 2 codes (2 possible solutions ) {C#}

16 Dec 2016 by Member 12908639

i'm trying to make a windows form program to teach the c# language...so i need to give an exercise ( like add 2 integers and show their sum )the user must put their code in a text box and the compiler will process itbut now it comes that part ,, that the exercise might have more...

Compare 2 codes (2 possible solutions ) {C#}

16 Dec 2016 by Patrice T

I hope you will get ideas in those sites.This one is to teach you programming:Learn to Program[^]and this one is to teach you languages:W3Schools Online Web Tutorials[^]in both sites, you type your own code, and it is ok when you reach the wanred result.

Concurrency Runtime in Visual C++ 2010

11 Nov 2010 by Ajay Vijayvargiya

Learn about parallel algorithms, parallel containers, tasks, task groups, agents library, task scheduler etc in VC10

Concurrency vs Parallelism

20 Nov 2018 by Shivprasad koirala

This article will explain the difference between concurrency and parallelism. Concurrency vs parallelism has been a debated topic for a long time.

Concurrent Programming - A Primer

3 Jan 2008 by Marc Clifton

An overview of Microsoft's Parallel FX initiative, including the Task Parallel Library and PLINQ.

artificial-intelligence

parallel-processing

Congigure MPI with Eclipse

9 Jan 2015 by Syed Muhammad Ali Gardezi

Hey guys I wanted to know how to install and attach MPI libraries in a c project using eclipse. Please tell me how to do it. I've surfing for 4 hours but I can't find a solution.

Control access to global data

8 Jun 2011 by neha.arora44c

I have a code which has a loop which takes around 2 hrs to complete one iteration. I have to execute 12 iterations and therefore the code takes around 24 hrs to complete. I have a 16 core processor to my access. I wish to parallelize the loop such that I have 12 threads, each executing one...

multi-threading

Control access to global data

8 Jun 2011 by barneyman

don't use global data; it's an anathema to multi-threaded code ...By all means use a data pointer which is created by the master thread and used by the children ....What conflict are you experiencing? reading the data should be fine, however, if you're writing data into anything that's...

multi-threading

Control access to global data

8 Jun 2011 by Albert Holguin

Use a mutex variable if you need to control access to a data array from multiple threads.

multi-threading

Control access to global data

8 Jun 2011 by Espen Harlinn

As Niklas Lindquist mentions: If the data is availalbe in memory before the threads start - possibly using a memory mapping - and the data is not altered by the threads. there is no need to protect the memory using a locking mechanism, just access at will. If each thread writes it's results to a...

multi-threading

Control access to global data

11 Jun 2011 by neha.arora44c

Thanks. :)Apparently the conflict was in writing the data to the files... All of them were accessing the same file together.

multi-threading

Control Electrical Appliances using PC

30 May 2004 by Taha Elsayed

Control electrical appliances using PC.

CUDA 3.0 and Nexus Parallel Nsight on VS 2010

6 Jun 2010 by GPUToaster™

Data Parallelism (Task Parallel Library)

14 May 2015 by anurag.netdeveloper

Hi All, I have billions of records and i have to do some long calculation on those records. If I am using a sequential for loop then it takes around 7hr to complete that task which is not affordable. To overcome with this, I’m using Parallel.For but the catch is concurrency is occurred in...

multi-threading

Data Parallelism (Task Parallel Library)

14 May 2015 by Frankie-C

You need to isolate thread local data for each concurrent threads.First of all read about TLS Thread Local Storage[^], then figure out how to use them in your project.For samples read this[^], or google for "C# thread local storage example".The Parallel.For Method exist also in a flavour...

multi-threading

DependentTaskRunner - How to Run Tasks with Dependencies and Stay Sane

10 Jun 2017 by Alon Lek

Running tasks in parallel while taking into account the dependencies between them

Differences of Nvidia CUDA & OpenCL

26 Aug 2013 by Buddhi Chaturanga

I want to distinguish of these two technologies relevant to their technological aspects.What are major differences and usage of each one of them?Pros and Cons.How we can handle process through GPU using each one of them?How those technologies can be implemented for 3D game programming?

Differences of Nvidia CUDA & OpenCL

27 Aug 2013 by Stefan_Lang

Basically, CUDA only works for NVIDIA cards, whereas OpenCL supports all. In theory. To my knowledge the only usable implementation for OpenCL is by AMD; NVIDIA also implemented OpenCL for their cards, but didn't put a lot effort into it.CUDA only is more powerful than the more generalized...

Duplicate songs detector via audio fingerprinting

23 Jun 2020 by Ciumac Sergiu

Explains sound fingerprinting algorithm, with a practical example of detecting duplicate files on the user's local drive.

efficiency of Parallel caculation in .Net 4.0

12 Apr 2012 by Rong(Rex) Fan

class Program { static void Main(string[] args) { Stopwatch timer1 = new Stopwatch(); Stopwatch timer2 = new Stopwatch(); timer1.Start(); int max = 10000000; ConcurrentBag intQueue = new...

Efficient Map Operations for Arrays in C#

3 Sep 2012 by Christopher Diggins

An informal survey of implementation techniques of the map higher-order function for arrays in C#.

Execute Task in Task every 5 seconds // Put Task to sleep

22 Nov 2013 by NeonMika

Hi codeproject-community!I'm just diggin' into the TAP and I'm hoping you can help me with a problem.Let me first explain what I want to achieve:I want to read from a RSS-feed every 10 seconds and want to write it's items to output it somehow on my form.My idea:I wrote an...

Execute Task in Task every 5 seconds // Put Task to sleep

22 Nov 2013 by bowlturner

And why can't you just use System.Threading.Thread.Sleep(10000); in the while (!cancellationToken.IsCancellationRequested) Block?As far as how to wait for the GetRssItems you can use the ContinueWith to call a 'finish' or 'next' I have thisprivate void StartTask(long...

Execute Task in Task every 5 seconds // Put Task to sleep

22 Nov 2013 by NeonMika

Okay, after reading some blogs i found some solution that work's pretty good for me: private Action getRss = null; private TaskScheduler ui = TaskScheduler.FromCurrentSynchronizationContext(); public ObservableCollection GuiListRssItems = new...

Fast Prime Factoring Algorithm

3 Jul 2015 by DrABELL

Serial and Parallel implementation of efficient Prime Factoriing algorithms

Fatal error in MPI_gather (matrix multiplication using MPI)

20 Apr 2016 by Member 12472890

Hello, I've just recently been messing around with my parallel programming in MPI (OpenMP after this!) and I ran a code to multiply matrices on a virtual machine (Ubuntu) with 4 cores. Unfortunately, I got an error:Fatal error in PMPI_Gather: Invalid buffer pointer, error...

Fatal error in MPI_gather (matrix multiplication using MPI)

20 Apr 2016 by Jochen Arndt

In your call to MPI_Gather(c + (size/nproc*rank), size*size/nproc, MPI_FLOAT, c + (size/nproc*rank), size*size/nproc, MPI_FLOAT, 0, MPI_COMM_WORLD);the send and receive buffers are identical which is not allowed when not using the MPI_IN_PLACE[^] option.

File Explorer Clone with Tabs and Parallel File Search Tool

21 Apr 2018 by Wade Harvey

This article shows how to use Winforms, WPF and C# to create a File Explorer Clone with Tabs and an extremely fast parallel file search utility.

artificial-intelligence

File upload problem in .NET and PLESK

13 Aug 2013 by rocky_em

I can't upload a file into my domain, that is hosted bya hosting company called PARALLELS PLESKMy aplication is written in .NET and when I try to upload a smallHTML file, I always get the following error:Access to the path '/View/SavedTemplate' is denied.i tried to resolve this...

Finite Element Analysis in VB.NET

4 Oct 2017 by Bhairav Thakkar

A robust framework for complete implementation of Finite Element Analysis in VB.NET

GetOrCreateValueDictionary

3 Feb 2018 by Paulo Zemek

A dictionary implementation optimized for caches and the GetOrCreateValue method, supporting real parallelism while reading and avoiding some problems encountered in the ConcurrentDictionary

GNU parallel with Python script - command line variables not working

13 Feb 2021 by Member 15071189

This is the first time I am trying to do python execution in GNU parallel. I have the below python script. I am trying to run it in parallel with a text.txt document loading the variables. The text document has the variables one on each line. ...

GNU parallel with Python script - command line variables not working

12 Feb 2021 by k5054

Have you checked that your input file is not in DOS format (i.e. ends in a CRLF rather than just an LF)? You can check this using the FILE command: $ file test.txt test.txt: ASCII text, with CRLF line terminators $ If it is in DOS format you...

GNU parallel with Python script - command line variables not working

13 Feb 2021 by k5054

I know this has been solved, but it occurred to me that there might be an issue with the code as presented. Namely, SQLite does not do concurrent writes to the database, so unless the full problem is compute bound, its probably quicker to do the...

GPGPU on Accelerating Wave PDE

13 Oct 2012 by Alesiani Marco

A Wave PDE simulation using GPGPU capabilities

Hard time trying to go Parallel

24 Apr 2012 by Armando Martínez González

first of all I apologize for my Englishi am trying to optimize/speed up some code i madeto make a texture with the information of the depth frame provided by a kinecti have been looking at System.Threading and other stuff but haven't been able to make this parallel any help would be...

Hard time trying to go Parallel

24 Apr 2012 by SASS_Shooter

If I understand your question correctly -- you want to have computation threads performing in parallel to make this look run faster. Is this correct?You need to break this down into simple steps then you can turn it into a multi-threaded process.1) break out your computation in your...

Hard time trying to go Parallel

24 Apr 2012 by Leonardo Paneque

In order to convert a solution to parallel you need to check also for output and input dependencies. for example it is not possible to run Fibonacci numbers in parallel, because a value X, depends on previous values x-1 and x-2.So that being said, be aware that not everything can be...

Hard time trying to go Parallel

24 Apr 2012 by Armando Martínez González

as of this http://tipsandtricks.runicsoft.com/CSharp/ParallelClass.html[^]i think parallel for wont do what i needbut i think im on to something with this but im not sure yethttp://msdn.microsoft.com/en-us/magazine/cc163340.aspx[^]

Hard time trying to go Parallel

25 Apr 2012 by Armando Martínez González

at last i got a hold of something usefullhere maybe this will help another noob like me void Calling_Method_In_Separate_Thread() { ParameterizedThreadStart parameterizedThreadStart = Method; var thread = new Thread(parameterizedThreadStart); ...

how can set manual thread or task to one of core's

3 Jun 2011 by jiji2663

helloi want to set a thread or task to one core's of cpu and manage it in c#?of corse whitout Process.GetCurrentProcess().ProcessorAffinity please F1F1F1F1F1F1F1F1 !!!!!!!!!!!thnx

how can set manual thread or task to one of core's

3 Jun 2011 by Dave Kreskowiak

Without setting processor affinity, you can't.It's also a bad idea unless you have VERY SPECIFIC reasons for doing so and know the pitsfalls.One such pitfall is that you limit your code to running on single core even if the core is also busy doing other things and other cores are idle. ...

how can set manual thread or task to one of core's

3 Jun 2011 by Sergey Alexandrovich Kryukov

Except for process affinity, there is also a thread affinity.Please see my past answer: How to program multicore[^].Again, in agreement with Dave, don't interfere in thread/process affinity unless you know exactly what are you doing!—SA

How can we be sure that the number of iterations of commands in "parallel.for" matches the number of iterations that were set for it?

21 Dec 2022 by Reza jafery

Hi guys, In my article, I want to compare the speed of sequential processing to parallel processing in various conditions, so in one example, I want to convert the following sequential command to parallel, but after converting it to parallel, it...

parallel-processing

How can we be sure that the number of iterations of commands in "parallel.for" matches the number of iterations that were set for it?

16 Dec 2022 by OriginalGriff

Multithreading isn't a magic bullet: it can't just speed up your code and give you massive speed improvements, and it certainly won't give you repeatable results every single time. The reason why is simple: you have N cores on your processor: 1,...

parallel-processing

How can we be sure that the number of iterations of commands in "parallel.for" matches the number of iterations that were set for it?

21 Dec 2022 by Reza jafery

I found a good example: using System; using System.Diagnostics; using System.Threading; using System.Threading.Tasks; namespace ConsoleApp { class Program { const long LOOP_COUNT = 900000; static long Calculate() ...

parallel-processing

How do I cancel parallel tasks that are dependent on each other for data

21 May 2015 by vinayvraman

Hi All,I have a question regarding cancellation of tasks. Please read below for the explanation. Any suggestion would help me solve the problem.I have 3 tasks. Lets call them task1, task2, & task3. Each of them are independent except for the data. i.e. task1 puts data into a queue1 and...

How do I cancel parallel tasks that are dependent on each other for data

22 May 2015 by Mathi Mani

Hi,What you are trying to do can be done. But it cannot be answered in this quick answers section. It is a pretty vast topic. Here are some articles that help you understand the concept and implement a solution.Process task based on the outcome of the previous...

How do I do the parallel port EPP comunication to Sony Dat recorder

7 Jul 2015 by Member 11682338

I need to do datatransfer with my older 16ch Sony Dat recorder. This is connected to the PC via parallel port IEEE 1284 EPP mode standart. How to use parport.sys to do propper handshake ... ?

How do I make a method threadsafe - C#

25 May 2015 by Abhishek Kumar (here to help!!)

Hi,I'm using Parallel.ForEach to read files and then insert processed information into database. There may cases when multiple files my reside similar data and while saving to database, in this scenario I need to updated previous record instead of creating a new...

multi-threading

How do I make a method threadsafe - C#

25 May 2015 by Shmuel Zang

Typically, you can make your method thread-safe, by wrapping the critical sections (the code that use the common resource) with a lock statement. In your case, it seems like the critical section is the DB access in the InsertData method.

multi-threading

How do I make a method threadsafe - C#

25 May 2015 by vinayvraman

Use "lock" before calling InserData. This way you will be sure that only 1 thread will be updating the DB. But it beats the necessity of Parallel.ForEach. Nevertheless if there is lot of data processing happening before InsertData then lock just before Insert should give you better results than...

multi-threading

How do I make a method threadsafe - C#

25 May 2015 by Frankie-C

More than a punctual solution I would like to expose some points that have to be considered when multithreading is applied.1. Is it really necessary? Trying to parallelize a naturally serial flow of execution is not possible. If your code is so, don't do it!2. Analyze the parts of the...

multi-threading

How do I parallelize this method with Bitmap

2 Jan 2014 by Sicco2

Hi,I try to parallelize sequence code in this article Steganography: Simple Implementation in C#[^]I know how to use Parallel.For, but in this case, I need return value (Bitmap object) inside the loop. There is 3 nested for and some if.Below I post both sequence and modified parallel...

How do I parallelize this method with Bitmap

2 Jan 2014 by Sergey Alexandrovich Kryukov

Instead of "parallelizing" the way you do, don't use GetPixel/SetPixel; these methods are prohibitively slow and can only be used to get or set very few pixels. Instead, lock bit and process them in...

How Do I Restore/Attach/Run A Script In Parallel Plesk Panel.

9 Jan 2014 by Member 10398526

Hello everybody,(I am using myLittleAdmin (for SQL Server and MSDE) v.2.0 lite r.096)I am unable to restore database from .bak file because there is no option to restore database from .bak file and when i run the Sql script in Query Analyzer i am facing the error "500 - Internal server...

how do I TPL or prllel coding in c#

5 Mar 2014 by Lakshmi munu

HiI have a table with 500,000 rows, I want to process each row, can anyone provide a sample code or even willing to pay some for it. doing for fun as I am learning C# so cannot pay a lot, but open to any conversation.contact me [EDIT email removed]