Why are OS threads considered expensive?

stackoverflow.com - 2012-04-01 15:53:38 - Similar - Report/Block

There are many solutions geared toward implementing "user-space" threads. Be it golang.org goroutines, python's green threads, C#'s async, erlang's processes etc. The idea is to allow concurrent programming even with a single or limited number of threads. What I don't understand is, why are the OS threads so expensive? As I see it, either...

Why are there constantly double threads on the same subject? do people not read before they post? or is it effort to hide REAL threads?

godlikeproductions.com - 2013-04-30 15:15:31 - Similar - Report/Block

I notice there are ALWAYS tons of non-important threads going up when some good threads get put up, threads that often have 2 or 3 threads on the same... - Poster: icyman - Updated: 04/30/13 9:15 AM - Views 16 - Replies 1...

[HELP] my useful threads are locked/deleted?

thebotnet.com - 2013-02-20 15:40:07 - Similar - Report/Block

For some reason some of my threads have been locked without any explanation: [MUST READ] How PayPal Finds YOU! <- Fixed! Reopened by Coden! How to earn and understand Rep On the contrary, some random threads I made last year are still opened: [TBN] Get a Letter from Santa Claus! <- Totally random thread Does TBN Prefer Coffee or Tea? <...

Regarding green threads in Java

stackoverflow.com - 2012-09-02 11:42:49 - Similar - Report/Block

How many kinds of threads do java support as far my knowledge there are two types of thread user threads and daemon threads but I was reading an article which states that ... Proper threads: these are abstractions around the underlying operating system's threading facilities. Thread creation is, therefore, as expensive as the system's --...

Thread - synchronizing and sleeping thread refuses to wake up (LINUX)

stackoverflow.com - 2012-04-03 19:01:03 - Similar - Report/Block

I'm developing an application For OpenSUSE 12.1. This application has a main thread and other two threads running instances of the same functions. I'm trying to use pthread_barrier to synchronize all threads but I'm having some problems: When I put the derived threads to sleep, they will never wake up for some reason. (in the case when...

Similar threads

badgerandblade.com - 2013-06-08 18:35:31 - Similar - Report/Block

The "similar threads" box is a nice feature, but it has a problem. Someone posting a new thread only sees the similar threads after the fact. How difficult would it be to show the "similar threads" box just before posting a new thread? This might reduce the number of almost-identical threads that pop up whenever a new product is release...

boost::asio internal threads

stackoverflow.com - 2013-02-20 13:40:47 - Similar - Report/Block

When running asio for some asynchronous TCP communication I noticed it starts a lot of (3-4) internal threads. Reading in the documentation, it says "The implementation of this library for a particular platform may make use of one or more internal threads to emulate asynchronicity" http://www.boost.org/doc/libs/1_41_0/doc /html/boost_asio...

eclipse debugger - show only suspended threads

stackoverflow.com - 2011-07-05 22:01:48 - Similar - Report/Block

I have a java application with a lot of threads. While debugging, and when execution in one thread was stopped by a break point, it's pretty annoying to scroll between all the threads to find the suspended thread. Is there a way (a button, shortcut key, whatever) to jump to the suspended thread, or better - to hide all not suspended threa...

Global Keyhook on 64-Bit Windows

stackoverflow.com - 2013-03-21 08:43:13 - Similar - Report/Block

I currently have some trouble to get a global keyhook working on a Windows 7 64-Bit O/S. Now I know that there are a lot of threads on this topic already here on Stackoverflow, but none of them quite give me an answer that I can work with or I don't quite understand how the issue is solved in these threads. So I will try to explain what I...

Vision Eternity 510 threads snapped clean off!

e-cigarette-forum.com - 2013-04-12 09:10:21 - Similar - Report/Block

hello all, A couple of days ago I purchased a Vision Eternity. Well, no less than an hour ago I dropped it while it was still screwed into my eGo c-twist. BUMMER.. The threads snapped perfectly off, I mean perfectly, and I managed to use tweezers to unscrew the threads out of my twist. My question being, how can I reconnect the threads to...

Cannot overclock 3770k

tweaktown.com - 2013-03-03 04:44:42 - Similar - Report/Block

I own a p67a-ud7-b3 and for some reason i can't move the multiplier past 39 does anyone have a idea how to fix this? Related Forum Threads GA-X79-UD5, IRST 11.6 Hot fix - what does it fix exactly? I5-3570K overclocking on Gigabyte Z68X-UD3H-B3 hybrid EFI BIOS Gigabyte ga-x48t-dq6 What is LED Code 04 on UD5H Board GA-P55A-UD3 problem...

SurfaceView overlay

stackoverflow.com - 2013-03-20 14:17:19 - Similar - Report/Block

I have a surfaceview which is running couple of threads. One of those threads is drawing on a surfaceview canvas - kind of animation. Now I would like to "overlay" one image (transparent) - to appear above surfaceview. This would look something similar to HTC help - overlays help text. One of the threads will set this overlay when request...

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MultiThreading WebBrowser Control C# STA

stackoverflow.com - 2009-08-09 16:30:38 - Similar - Report/Block

I want to make 3 threads that each run the WebBroswer control. So I would like to use the ThreadPool to make things easy. for(int i = 0;i < 3;i++) ThreadPool.QueueUserWorkItem(new WaitCallback(gotoWork), i)); WaitAll(waitHandles); ....../ void gotoWork(object o) string url = String.Empty; int num = (int)o; switch(num) case 0: ur...

PintOS, kernel panic with -v option bochs on ubuntu

stackoverflow.com - 2013-03-12 05:55:56 - Similar - Report/Block

when i do "pintos - run alarm-multiple" in .../build/ everything seems fine. but when i do "make check" in .../build/ all 7 tests failed with the same "Run didn't start up properly: no "pintos booting" message" pintos -v -k -T 60 -bochs - -q run alarm-single < /dev/null 2> tests/threads/alarm-single.errors > tests/threads/alarm-single.out...

Android-dev AudioRecord without blocking or threads

stackoverflow.com - 2013-04-04 07:21:03 - Similar - Report/Block

I wish to record the microphone audio stream so I can do realtime DSP on it. I want to do so without having to use threads and without having .read() block while it waits for new audio data. NOTE: Please don't say "Just use threads." Threads are fine but this isn't about them, and the android developers intended for AudioRecord to be ful...

Dose message queue support Multi-thread?

stackoverflow.com - 2012-03-08 06:29:25 - Similar - Report/Block

I have 3 questions about thread and process communication. Can the Linux function msgget(), msgsnd(), and msgrcv() be invoked by multiple threads in one process? These functions are to attempt to access(r/w) the process' message queue. All race are supposed to be taken care by system? If not, any good method to support threads send messag...

Lavatube V2 Positives/Negatives? (not a Vs thread)

e-cigarette-forum.com - 2013-05-20 14:29:46 - Similar - Report/Block

OK I have been searching around and reading other threads, but most of them are versus threads. I am currently not comparing the Lavatube V2 to anything else, I am just looking for positive and/or negative feedback on these. What has been your experience with one? Or have you heard a friend praise or trash one? Looking through the other t...

threads reagarding notification

stackoverflow.com - 2012-04-08 18:44:35 - Similar - Report/Block

I was going through threads and I read that ..The notify() method is used to send a signal to one and only one of the threads that are waiting in that same object's waiting pool. The method notifyAll() works in the same way as notify(), only it sends the signal to all of the threads waiting on the object. Now my query is that if Lets say...

AGA T2 sharp & hard threads

e-cigarette-forum.com - 2013-03-25 19:40:01 - Similar - Report/Block

I've bought 2 of the T2s recently but discovered the threads are very sharp. The grade of SS is also hard compaired to the brass of a standard 510 female connector These have almost destroyed the threads on my Vamo :( And yes, I'm very careful when removing/replacing tanks & I only ever finger tighten (I had a go at a friend for over tigh...

REGARDING Rippln Invites

thebotnet.com - 2013-04-21 16:28:11 - Similar - Report/Block

All of these threads belong in Self Promotion. Miscategorized threads will be warned or infracted as Miscategorization or Self Promotion.

Error 9C59 when installing IE 10

sevenforums.com - 2013-04-25 08:59:45 - Similar - Report/Block

Hello, Well once again this error, 9C59. Any help will be much appreciated. I usually try to fix PC problems on my own. And by "on my own" I mean using my knowledge AND reading forums like this one, asking is one of my last resources since I always think answers will be found in threads already created. Even though I tried other solutions...

MVC4 WebAPI Reason Phrase?

stackoverflow.com - 2012-03-20 21:44:37 - Similar - Report/Block

According to the HttpResponseMessage documentation on MSDN, the reason phrase (as in, the "OK" part of 200 OK) should be settable. The HTTP response does let me set the reason phrase: HttpResponseMessage response = new HttpResponseMessage(System.Net.HttpStatu sCode.Conflict); response.ReasonPhrase = "conflict message"; However, when I co...

CADisplayLink in a thread

stackoverflow.com - 2012-08-18 06:26:15 - Similar - Report/Block

I'm making a game and I want to run the game logic code and the rendering code on separate threads in hopes of enhancing performance. But for the life of me, I can't figure out how to run a CADisplayLink in a spawned thread. Right now I'm using NSThread for multithreading. I've read about NSOperationQue , but I don't really understand i...

Should I synchronize mq_timedreceive calls when performed by multiple threads?

stackoverflow.com - 2012-03-01 17:32:07 - Similar - Report/Block

I'm using Posix Message Queues on Linux. Basically, I have multiple threads that receive messages from the same queue by calls to mq_timedreceive If more than one thread is running at the same time and the queue is not empty, am I guaranteed that a message does not get received more than once (i.e. the message does not get delivered to mu...

Compute Shader

gamedev.net - 2013-03-28 23:51:48 - Similar - Report/Block

Hello, i am new in compute shader programming. Unfortunately, there are no good book and other material on this topic, so i have lots of questions. Because Compute shader uses lots of threads, is it possible to use compute shader for post effect instead of rendering quad screen ? will be this technique faster, since it's multithreaded ? I...

qt Can two threads read from the same QList at the same time?

stackoverflow.com - 2012-02-28 04:38:24 - Similar - Report/Block

Pretty new to threading and I have this QList that the threads share between them. They all have their own space that they can work on, and the GUI (the model/view) access this list constantly. I then get this crash which points to QDataList.size(). The debugging doesn't really help me since I never come across this issue if I step throug...

Does the 7's Hybrid Battery have ego threads?

e-cigarette-forum.com - 2013-04-21 01:02:55 - Similar - Report/Block

Hello everyone. I began my vaping adventures about 6 months ago with a 7's 650mah "Hybrid Battery" and their cartomizers. However, as is true of many such companies, my7's marks up the cost of their cartos, presently priced at $6.50 apiece. That's just too much for what they are, so I'm looking to find cheaper cartos from other manufactur...

Gonna start a Mark 42 foam suit and helmet! First things first

thereplicapropforum.com - 2013-05-08 04:08:56 - Similar - Report/Block

Where are the foam files for the mark 42, could someone please link them? also, any particular threads (particularly the mark 42) that is a MUST READ for the process? (Ive seen Stealth's threads) thanks!...

Opção max worker threads

babooforum.com.br - 2013-01-27 02:00:05 - Similar - Report/Block

Use a opção max worker threads para configurar o número de threads de trabalho disponível para os processos do MicrosoftSQL Server. O SQL Server usa os serviços de thread nativos dos sistemas operacionais Microsoft Windows 2000 e Windows Server 2003 de forma que um ou mais threads dê suporte a cada rede que o SQL Server dá suporte simult...

Splitting work across threads in C#

stackoverflow.com - 2013-06-02 11:30:48 - Similar - Report/Block

Currently, I process frames read from a video one by one, then write them to file. This seems inefficient and slow, so I'd like to split the work across multiple threads. My current code can be summarized like this: for(long n = 0; n < totalframes; n++) { using(Bitmap frame = vreader.ReadVideoFrame()) { Process(frame); //awfully slow W...

battery trouble and 510 connection

e-cigarette-forum.com - 2013-03-20 13:54:53 - Similar - Report/Block

i am having a problem with a debranded ego 1100 mah battery when i put it on charge now the button light does not go out and it always did before it may have gotten some juice in it but not too sure, my other question is does anyone know what the thread pitch and size is of a 510 connection as i have a few delivery devices that the thread...

2 Hottest Threads (in last 5 days)

thebotnet.com - 2013-03-15 13:09:22 - Similar - Report/Block

hey guys i have 2 hot threads that made it to the list! http://thebotnet.com/make-money/1920...e rve-0-50-5-a/ http://thebotnet.com/freebies/191118...o upons-9-80us/...

python multithread module is dead suddenly

stackoverflow.com - 2013-03-07 12:06:39 - Similar - Report/Block

My purpose is that I want to write a send mail module via python. This program will read data from HotQueue (Redis Queue) and then call my API for sending emails to customer. My module is using multi-threads. I set the python module as background process using screen command. Unfortunately, my program is very unstable. Sometimes, program...

Write to text file from multiple threads?

stackoverflow.com - 2012-04-05 12:37:36 - Similar - Report/Block

i have 20 threads that write with the println() function on a file called results.txt. How can i synchronize them all? I note every time my program run i have different number of lines of text in results.txt. Thank you.

What mechanism JVM use to block threads during stop-the-world pause

stackoverflow.com - 2013-05-15 07:01:55 - Similar - Report/Block

I heard this question on an interview and couldn't provide an answer. Later I searched thru the internet and still didn't find an answer. Can anybody tell me how JVM stops threads during stop-the-world pause when collecting garbage and how it run them again.

Post count not changing

thestudentroom.co.uk - 2013-04-08 14:46:25 - Similar - Report/Block

I know it's not a serious problem, because I can still post and reply to threads, but I'd still like to know why my post count hasn't changed for ages. I've only just joined TSR, but I still must have posted on threads at least 30 times, however the post count on my profile has said 7 for about 2 or 3 days. Anyone know why this is?...

attendance help!!!

thestudentroom.co.uk - 2013-03-15 13:22:19 - Similar - Report/Block

Hi all, I'm not sure if this is thread is in the right category... I have a problem regarding uni attendance. I have not been able to attend my whole second semester due to me having to look after my mum as she has become quite ill, I haven't managed to complete any work either and because I've missed so much anxiety has kicked in :( I kn...

What is the reason for this behavior of the given code? [closed]

stackoverflow.com - 2013-02-27 06:42:50 - Similar - Report/Block

The output is one (1). Please provide the reason: int main(int argc, char** argv) int k = 1; for (int i = 0; i < 100; i++) k = k++; cout << "Value of K "<< k << endl ; return 0 ;...

Touch version of site with iPad

techguy.org - 2013-02-28 16:52:13 - Similar - Report/Block

I can't seem to find the area that has my subscribed threads when using the touch option on the iPad. Since this is not my iPad but I use it occasionally, I will not download the app that is available :). However the issue remains, where do I se my subscribed threads?...

Watched threads bug?

thestudentroom.co.uk - 2013-02-26 15:28:10 - Similar - Report/Block

Hi, I think I've found a bug. I couldn't find reports of a similar problem, so I hope this isn't a duplicate report. I've been watching several 2013 Medicine Applicant threads over the past few months, and I reported spam (a post in the wrong thread) in the Sheffield 2013 Medicine Applicants thread. This was dealt with by a mod (Potally...


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