Identify a bug in the Linux kernel module

I am marking Michael's as he was the first. Thank you to osgx and employee of the month for additional information and assistance. I am attempting to identify a bug in a consumer/produce kernel module. This is a problem being given to me for a course

Why threads do not work

Here is my following code: private int counter = 0; public void incC() { counter++; System.out.println("Counter is: "+counter + " "+Thread.currentThread().getName()); } public void printC() { System.out.println("Counter is: "

to load multiple versions of the class file in the JVM

Is it possible to load multiple versions of the same class into the JVM. I have a version of the class "XYZ" loaded in the main thread and I have multiple children threads doing some work. I want to load different versions of class "XYZ&quo

Peewee python2.7 database lock error

I have an script that queries on a database for "blogs" and for each blog, starts a thread to query its RSS address and check for new posts and record them on the database. Initially, I was running this script with a maximum of two parallel thre

producer / consumer gets different data per queue

Solved!!! Thank you Beware of what kind of object you put into Queue.If you put a value, such as int, then enqueue will make a copy and everyone is happy. If you put a reference, such as byte[], string, enqueue put this reference into queue, then her

Mutex vs object problem

I was looking at java code for Collections.synhronizedMap().I found that it has below implementation.Now my question is 1) why are we using synchronized(mutex) 2) what if we use synchronized(m) I understanding is that if we do synchronized(m) then al

Synchronizing threads with multiple agents

I have a java code, that should be read by multiple agents, which were created by the JADE platform. Each agent has his own thread of execution. Therefore, all my agents run my java code concurrently, but not simultaneously. I've tried using the Clas

Difference between thread creation phenomena and start them

What is the Difference between the two thread creations in the code below: public class MyThread extends Thread { int a=0; public void run() { System.out.println("Some Thread"); } public static void main(String[] args) { MyThread m=new MyThread(

Equivalent of C # lock in Java?

Equivalent of C# lock in Java? For example: public int Next() { lock (this) { return NextUnsynchronized(); } } How do I port this C# method to Java? public int Next() { synchronized (this) { return NextUnsynchronized(); } } That's it. And the next co

DoEvents vs anything else - & gt; for long operation COM

I have a WPF program where my model need to load a "Out-of-Proc" (.exe) COM component in order to achieve some validations when a user make an action on the UI. I'd like to inform the user that a long action will take place to let him know that

IOS memory crashes UIScrollview with asynchronous image loading

I am presenting a two columned scrollview of images similar to Pinterest by using PSCollectionView https://github.com/ptshih/PSCollectionView and loading the images asynchronously using https://github.com/rs/SDWebImage On iPhone 5 it is running conti

Access a database from a DialogFragment and toast a message

I have a DialogFragment which displays a simple yes/no question. When the user presses "yes", I perform a database request (which basicaly deletes an entry). I then toast a message to report a success or failure to the user. I try to avoid calli

Multithreading - const const array passed as parameter

I have a function as follows: laodFunc(const map<uint16_t, string> & pClasses, const char * pFilePath); And I'm calling it by this way. That in order to run it as a new thread with boost boost::thread_group g; stringstream myStr; ...... boost::t

Synchronized keyword

I am developing an app which downloads images and saves them to the sdcard. The class which interacts with the sdcard looks like this... public class SDCardImageManagerImp implements SDCardImageManager { private Context context; @Inject public SDCard

Multithreaded security with Java synchronization

I'm implementing a program that calculates a Julia set. It will use multiple threads, depending on how many processors are available. Each thread calculates a line, but only when that line is not being calculated by another thread. This part WORKS pr

sort a list using 2 threads

I'm working on a project and I didn't get this part: use two threads to sort an ArrayList. each thread will have a sort of half the list. the main thread will wait the two threads to finish, then he will take care of merging the two lists from the so

How to stop a thread after a while in Java?

In my android app I am having a thread in which I fetch data from a web service. So normally it works well, but sometimes if the connection is too slow it kind of hangs. So is there any way by which I can set some time say 1 min, and if the thread pr

C # threads that synchronize two cameras

I need to capture images from two cameras and combine them together. The flow is like this: two threads, one for each camera, sample the camera frames. Each one sends the frame to a third thread, the consumer. Only when the consumer has two frames he

ramification vs multi-threading

There's a fast path in the code that looks like this: while(1){ select(fd_set...); if (fd_isUserspace) { process_user_packet(fd); // RPC involved } else { // kernel process_kernel_packet(fd); // RPC invovled } } // while(1) Basically reading an activ

How does an asynchronous socket server work?

I should state that I'm not asking about specific implementation details (yet), but just a general overview of what's going on. I understand the basic concept behind a socket, and need clarification on the process as a whole. My (probably very wrong)

Problem with maxWorkerThreads and thread count

I have created an ASP.NET application which creates threads in an infinite loop. I set maxWorkerThreads to 20 in processModel in machine.config. When I checked the Thread count in perfmon there was around 7000 threads created in worker process. In Pa

.NET Parallel.ForEach, StreamWriter output + secure thread

In the past I have used ThreadPool.QueueUserWorkItem to spawn multiple threads from a manager class. This manager class subscribes to an event in these spawned threads which is raised when the thread work completes. The manager class can then handle

How should a thread shut down in Java?

This is a short question. At some point my thread understand that it should suicide. What is the best way to do it: Thread.currentThread().interrupt(); return; By the way, why in the first case we need to use currentThread? Is Thread does not refer t

How to think about Java threads? aka Thread.stop

Exposition: I think the Java VM is awesome. It's guarantee of the safety of bytecode, the the standard libraries, ... are amazing, especially the ability to load a Java class on the fly, and know that it can't crash the VM (good luck with *.so files

Ehcache & amp; MultiThreading

Does ehcache support multi-threading by default or does it require any configuration changes? On multi threading my application with Ehcache i found that the DB hit count is actually increasing i.e. there is no global cache available for all the thre