.net 4.0 - Task Parallel Library. Nested task do not start -

-

I am working with the new TPL library and I am facing some strange behavior, I understand not can. For some reasons nested work has not started in my case. I have simplified the following solutions: 

  bool flag = false; For (Int i = 0; I <5+ i ++) {Tasks. Factory STARTNU (() = & gt; {while (true) // lots of new things to come {THREAD.Sleep (200); // SOME WORK WORK. Factory.startu (() => {flag = true} ;});}}); } Thread Sow (2000); Assert.IsTrue (flag);

I have 5 tasks that are running simultaneously, each task gets some elements from the pending queue, do some operations and then try to run nested work for the results of this operation. Please. The problem is that if there are so many elements (whereas the (fact) limits it) and all 5 functions are not continuously nested functions. Loop can only be started after a lot of tasks while completing its execution.

Tasks. Factor Startup does not start a task, it adds to the list of tasks to be determined by the task and determines the scheduler to run the work on the basis of things; The number of available cores (the size of the thread pool), the current CPU load and the current work throughput.

You should read section about task scheduling here:

pdf page 63.

Long lasting option Bypassing the thread pool completely eliminates your problem "fixes" There are some disadvantages in it, this should allow you to create more threads from your system, which should be actually used, due to excessive reference switching, lower performance will be shown.

The threads used are misguided because the threads are "stupid" schedules, it sees that more work has been added and the CPU load has not increased yet. 62 You should change sleep with a tight loop that includes math (such as Sqrt) for example.

A single external loop that reads items from a queue and executes them on the task In this way, your application will use the parallelization of the system without overloading.

The following answer can be of a value:


Comments

Post a Comment

Popular posts from this blog

c# - sqlDecimal to decimal clr stored procedure Unable to cast object of type 'System.Data.SqlTypes.SqlDecimal' to type 'System.IConvertible' -

-
I'm new to this I'm writing a clr. stored procedure that can be used to get values ​​used in a calculation Call for another stored procedure for Gives an archived methodology int (I think SqlInt32? Value of the table's value is int) which is then necessary to convert to decimal. Here I have the code: Public static integral mood (SQL MDMMYLUE, escalistering AMY type, out of SQLDCM Result) {aResult = 0; Try {SqlConnection conn = New SqlConnection ("Reference Connection = True"); SqlCommand cmd = New SqlCommand ("sp_GetType", conn); Cmd.Parameters.AddWithValue ("@ myValueType", aMyValueType); Cmd.CommandType = CommandType.StoredProcedure; Conn.Open (); Object type = CMD. Exclamation Asser (); Conn.Close (); Decimal type FORCalculation = Convert. ToDecimal (type); Decimal value = convert toDecimal (aMyValue); // ** calculation calc = new calculation (); Decimal result = calorie.docalulation (typefarculation, value); I get an exception...
Read more

Calling GetGUIThreadInfo from Outlook VBA -

-
I need to find the active window'm writing a VBA macro in MS Outlook, which is a specific process. The goal of this is to get the active window / document name even if its original application has more than one document interface. User processor with GetCurrentThreadId is active, I am using GetGUIThreadInfo to get .dll. Here is the correct code: private type RECT as as Left LongPtr top LongPtr right LongPtr down LongPtr termination of private type GUITHREADINFO cbSize as LongPtr flags LongPtr hwndActive LongPtr hwndFocus LongPtr hwndCapture LongPtr as as as as as reset as LongPtr rcCaret as LongPtr hwndCreate as LongPtr hwndMoveSize as HwndMenuOwner end of Private Equity PtrSafe function GetWindowThreadProcessId Lib "user32" (_BVV hnw LongPtr as LongPtr Nig Mr. announced as PtrSafe function GetGUIThreadInfo Lib "user32" _ (ByVal dwthreadid as LongPtr, _ lpguithreadinfo as GUITHREADINFO) LongPtr Sub MyFunction () as dim strWindowTitle string = space as s...
Read more

Obfuscating Python code? -

-
I'm looking for a way to hide my Python source code. print "Hello World!" How can I encode this example so that it is not human-readable? I have been asked to use Base 64 but I'm not sure how. itemprop = "text"> It is limited only, first level ambiguous resolution, but has built-in: byte-code in Python Is a compiler for: dragon-o-m py_compile & lt; Your program.py & gt; creates a .pyo file with a byte-code, and where the docstrings are removed, etc. You can rename .pyo with the .py extension, and python & lt; Your program.py & gt; runs as your program, but it does not have your source code. PS : If your program blur modules like this, you need to rename them with the .pyc suffix (I Not sure it will not break a day), or you can work with .pyo and run them with python -o ... .pyo ( Import should work). This will allow dragon to search your modules (otherwise, Python looks for the .py module).
Read more