Thread is a form of a process to divide itself into two or more tasks that can be executed concurrently.

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Show all running tasks in Assembly

Is it possible to show/log everything what the CPU does? The CPU knows what it executes, so it could print the running threads/tasks on the screen or in a file.
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how can force a prgram to use all of CPU capacity?

I have Windows 7 And a Intel Core-i5 CPU (4Thread) some programs like Firefox, only use up to maximum 25% of All CPU(only 1 Thread) And some programs like Winrar, use up to 100% of All CPU Can ...
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1answer
62 views

how to make Apache 2.4 work in single worker mode by default?

I'm using Apache 2.4 on my server. My scripts are using a lot of system() commands and they require to work in one process mode. When I start apache using the command: apachetctl -X (which ...
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17 views

Are there two seperated schedulers in major operating systems, one for processes and one for their threads?

Let's assume a process is given the CPU on a single-core CPU system by the scheduler and let's assume this process has 10 threads. Who decides which of the ten threads gets the CPU? In other words, ...
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820 views

CPU usage always around 40% because of wait-chain?

I am facing a very rare problem and it's causing much trouble. Whenever I boot my PC(HP 2000-2116tu, Win7, 4GB mem), there is a set of processes(legitimate ones and not virus), one of which starts to ...
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1answer
55 views

How many threads are concurrently executed?

The output from WMIC: C:\Users\fra>WMIC CPU Get DeviceID,NumberOfCores,NumberOfLogicalProcessors DeviceID NumberOfCores NumberOfLogicalProcessors CPU0 4 8 C:\Users\fra> ...
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1answer
88 views

Command-line Number of thread per process on MacOS

I'd like to be able to get the number of thread per process in command-line and get the exact same number I can see via the Activity Monitor. At the moment the IntelliJ IDEA process (PID 5235) has ...
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1answer
88 views

Cores and threads? How does it all work exactly?

I am confused by this ... if a CPU has 2 logical cores, it can run two programs 100% concurrent, yes? Otherwise, 2 programs on one CPU must be 100% time-divided (can't run independently as the same ...
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22 views

Is parallelism in computer science always directly tied to the number of processor cores?

Specific to the Java programming language, would it be accurate to say that two threads can be concurrent, but can only truly be run in parallel if there are two or more cores?
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57 views

How does Windows affinity work with hyperthreaded CPUs?

Let me describe our requirement in detail. We are doing some kind of assignment which requires capturing of IP data through NIC card and then processing the captured data in real time. The processing ...
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0answers
11 views

Tomcat 5 keeps jumping between threads for no reason

I have Tomcat 5 server running on Windows Server 2003 with JDK 1.6.03 hosting one custom made webapp. App worked fine, but some time ago it started hanging for no reason. I connected via JMX and ...
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4answers
4k views

What's the best way to perform a parallel copy on Unix?

I routinely have to copy the contents of a folder on a network file system to my local computer. There are many files (1000s) on the remote folder that are all relatively small but due to network ...
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61 views

How to change limits of non-interactive process?

I am trying to change the RTPRIO limit of a process that's run at startup. I have found 3 ways to change process interactively: setrlimit ulimit /etc/security/limits.conf However these only seem ...
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0answers
30 views

Command to get associated threads for pid in OSX

In Linux I can use one of the following ps -p pid -L -o pid,tid,%cpu,%mem ps -C command -L -o pid,tid %cpu,%mem What is the equivalent command for OS X ?.
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1answer
109 views

Launch each Windows Explorer window in a separete process

Win7 Win64. I configured Windows Explorer in Tools > Folder Options > View > Launch folder windows in a separate process. It is checked, to make sure I rebooted Windows and it was still checked. ...
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2answers
4k views

Does GNU/Linux counts processes and threads together when I limit their number?

I want to limit the number of processes per user on my machine, with /etc/security/limits.conf and the nproc value. I have read here that Linux dosen't distinguish between processes and threads? My ...
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2answers
13k views

How do I monitor or view the thread count of a certain process on AIX?

How do I monitor or view the thread count of a certain process on AIX?
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1answer
3k views

what does 2 core 4 threads mean in cpu?

I wanted to know what does 2 cores 4 threads mean about a cpu? I am talking about this cpu which i have http://ark.intel.com/products/47341/Intel-Core-i5-520M-Processor-3M-Cache-2_40-GHz I initially ...
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2answers
545 views

Configuring systemd to allow daemon to set RT priority

I have a daemon that calls pthread_setschedparam() to set the thread priority. On a system using systemd (OpenSuse 12.1), this fails, because sched_setscheduler() returns EPERM. From what I ...
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1answer
69 views

Windows 8.1's audio service chokes on threads and handles?

-- snipped as the hibernation thing seems to be invalid now -- Edit: I found this... This process is using 52,552 handles and 6,065 threads when I took the screenshot. At the time of writing, 52,913 ...
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3answers
63 views

Multiple CPUs, multithreaded performance

My program: 100% CPU and RAM based, performs mathematical calculations, reads the data from the HDD into RAM in the beginning. No communication between threads. The threads, all take the same time ...
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0answers
275 views

ProRes transcoding in ffmpeg too slow

We are trying to transcode movies / clips into ProRes LT by using following options: ffmpeg -threads "16" -i "$2" -flags +ildct -vcodec prores -profile 1 -qscale 4 \ -threads "16" -r 24 -vf ...
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3answers
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Can I close a firefox tab through the console?

There I was downloading a bunch of stuff from the Internet quite happily using Firefox built-in download manager when I decided to check code academy (a site that teaches you how to program in ...
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1answer
422 views

Why are user level threads faster than kernel level threads?

I found out that user level threads are a lot faster than kernel level threads but I could not find any convincing example of WHY is user level threads are faster than kernel level threads ? Could ...
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2answers
2k views

What Exactly is a Threaded Web Server?

I would like to know what a threaded web server is? I have performed many searches but am unable to find anything that gives a clear explanation or definition; perhaps somebody can enlighten me.
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311 views

I want Adobe QT32 Server.exe to use no more than 21 threads

I need to impose this limit because quicktime or rather "Adobe QT32 Server.exe" will crash when trying to export H.264 .mov files. Personally, I would just choose a different codec but I work at an ...
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3answers
121 views

Single threaded process being executed on 2 cores

On my quad core cpu, it seems like a single thread (endless while loop) is being executed on 2 cores simultaneously. Why is this? Shouldn't a single thread be executed on one core only?
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1answer
127 views

Use all processor cores, 1 core/per 1 thread in *nix

According to xz documentation the "-T 4" means I should be using 4 threads, each compressing a different part of the file simultaneously. Before using nice -19 I would only get %50 usage of 1 core, ...
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1answer
289 views

Installing ffmpeg (namely fdk-aac) on cPanel server causes issues with perl threads

Basically, I'm trying to install FFMPEG on a cPanel server. I'm able to get everything installed and working (tested using ffmpeg -v) except for libfdk-aac. I can do the git clone and everything ...
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1answer
59 views

i3 3210 do all 4 threads run at once

windows 7, task manager show%s thread 1,2,3 all running around 40% thread 4 is at 2%. Is this normal? i3 3210 windows 7 8GB DRAM cpu running at 35% per task manager
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1answer
324 views

Blocked process state affect on thread state within process?

If multiple threads are running within a process and the process goes from running to blocked state then do all the threads within the process automatically go into blocked state as well? If the ...
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3answers
2k views

Task Manager is saying the system is running with over a thousand threads

I opened up Task Manager and looked under the "System" area and saw: Threads: 1337 Since I have a dual-core processor with hyper-threading available (meaning four threads), how is it possible to ...
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2answers
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Why is it quicker to switch between threads than to switch between processes and share data between them?

Why is it quicker to switch between threads than to switch between processes and share data between them? For example, in the apache web server running on ubuntu can use either the Prefork MPM ...
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2answers
164 views

Cores, threads and multi-processing

I know all this terminology is a confused field atm, but I'm trying to interpret how they are being used at: http://www.cpu-world.com/CPUs/Xeon/Intel-Xeon%20E7-8870.html The context I've got is that ...
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9answers
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how do you view all threads running on Linux?

I've used 'top', but I need a tool that can give me an arbitrary-time history of threads that have executed on my system (CentOS 5.4)?
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1answer
286 views

Is it faster to run one process that spawns N threads or to run N processes?

I need to run ~1500 jobs on my lab's server. The program I am using (blastpgp if anyone cares) is capable of running in parallel mode, the "-a" option sets how many threads it will launch. The server ...
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2answers
1k views

Can a single process be executed in two or more processors in a multiprocessor system?

I have heard that one processor can work on only one process at a time. Is this true? If so, then how can a single process be executed in more than one processors at a time? Is this even possible? ...
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0answers
122 views

Is it possible to find what's “choking” Firefox?

Is it possible to find what exactly is causing Firefox to randomly CPU-spike at 13%, freezing it entirely? And by "exactly", I mean finding what functions/calls/modules/threads/drivers are the direct ...
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1answer
105 views

When a thread is created, how is the initial context determined? [closed]

How is a thread's initial context (registers state) determined on thread creation? For example: Current thread context eax=0x4, ebx=0x9000, ecx=0xfff, etc... Create a thread is called to begin ...
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2answers
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What do you call the “action of” striping threads across multiple processors? [closed]

A question of curiousity, I understand [one thread per core] or with time slicing, [many threads one core] But, is there a way even through emulation, even with a performance cost, to... how to say... ...
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2answers
2k views

AMD FX Series: 8 cores or 8 threads in 4 cores?

I've looked at FX-8XXX series processors on Windows, and they show as 4 core, dual-threaded processors. (4 cores w/ 2 threads per core) The processors are advertised as 8-core. Do they actually have ...
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3answers
710 views

Running threads on a non hyper-threading Intel processor

Intel Pentium Processor E5700 (2M Cache, 3.00 GHz, 800 MHz FSB) does not have hyper-threading but it has has 2 cores so I am assuming it has 2 threads Now if I write a heavy number crunching program ...
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2answers
643 views

Optimum number of threads to use for best parallel processing on an i5 [closed]

I'm interested in running some reasonably heavyweight processing on my desktop/laptop (not so bad that it requires a cluster, but needs a good home machine). My question is how many threads to create ...
5
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2answers
545 views

Which logical CPU (core) belongs to which socket?

I need to test performance of a multithreaded program on 1 CPU, but I have a dual CPU machine. I need to set affinity to those logical CPU's, that share their socket, oterwise they strongly benefit ...
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2answers
848 views

Are 1,000 threads normal for services.exe?

I noticed that my system is slowing down and services.exe often uses quite some CPU (around 10-40%), especially after waking up the PC. I find it hard to find out more about services.exe, and what is ...
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1answer
1k views

Thunderbird - watched and ignored threads

If I go to View->Threads I can select to view only watched threads, or to display ignored threads. How do I set this on a thread? I keep searching, but there just doesn't seem to be any option to ...
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1answer
2k views

Under linux, how do I find out if some specific thread is run with real-time priority?

I have a process (jackd) that runs several threads. One of the threads it runs should be in realtime, the others run on normal priorities. I'd like to check if it actually runs on realtime. What ...
5
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1answer
3k views

What is a user thread and a kernel thread?

I know what a thread is and I know how they work but Im quite confused as to what a 'User Thread' is and what a 'Kernel Thread' is in terms of what they are allowed to do. Can you please clarify what ...
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1answer
163 views

run many python web apps without eating the processor away

I need to run many Python web apps (mostly Django, but not all of them) on a server. Currently I'm running them with uwsgi emperor mode (I guess... I just have all configs in /etc/uwsgi/apps-enabled/) ...
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1answer
607 views

Peeking inside Firefox - what's maxing out the CPU

I am having a Firefox with plenty of add-ons installed. Sometimes Firefox get stuck with high CPU usage on the pages having no Flash. I'd like to solve what's causing this in a more professional ...