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

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16
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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)?
15
votes
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 ...
6
votes
3answers
5k views

Can a multi-core processor run multiple processes at the same time?

I understand that a multi-core processor can run multiple threads of the same process at the same time using its different cores. Can it also run multiple processes at the same time(each core running ...
6
votes
3answers
1k views

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 ...
5
votes
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 ...
5
votes
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 ...
5
votes
2answers
547 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 ...
5
votes
1answer
208 views

Unexpected shutdown with heavy single threaded process and single core affinity

I'm not sure what's the cause of the problem, but it happened 3 times in two weeks under similar conditions. I checked with the laptop's support desk and they made me run several tests to see if my ...
3
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1answer
5k views

How can you get thread count of running process in windows 7

How can you get thread count of running process in windows 7. i have a multi threaded c# application and i want to see active threads of that process while running.
3
votes
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 ...
3
votes
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 ...
2
votes
1answer
215 views

How do I prevent myself from accidentally specifying too many threads when compiling?

When I compile stuff I usually want to do this fast, so on my workstation I issue make -j16 And (gnu) make starts compiling with 16 cores. However when I am back on my laptop I don't have 16 cores ...
2
votes
1answer
143 views

Dual Core, Core 2 Duo, Core i Series

How does Dual Core, Core 2 Duo, Core i Series processors executes (1) process without threads (2) process with threads Actually I want to know how these processors distribute a single process ...
2
votes
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?
2
votes
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 ...
2
votes
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 ...
2
votes
2answers
926 views

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 ...
2
votes
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 ...
2
votes
2answers
3k views

What does “thread” mean as related to CPUs? [duplicate]

Possible Duplicate: What are threads, and what do they do in the processor? I know a process can have multiple threads, on my Windows 7 machine each process has over 10 threads in avg. ...
2
votes
1answer
2k views

Windows 7 limit the number of threads that a process creates?

Do some versions of Windows 7 (32 or 64 bits) manage the number of threads that any specific process are creating? If so, is there a way to configure a maximum limit of threads on system (in the ...
2
votes
1answer
205 views

Mail.app Bug — Keeps Showing Messages

I'm running Mail.app on my Mac (Snow Leopard). Two GMail accounts are linked to it using POP. There is an annoying bug which causes certain messages from one of the account to show up in my Inbox. ...
2
votes
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 ...
2
votes
1answer
291 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 ...
1
vote
5answers
5k views

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 ...
1
vote
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.
1
vote
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 ...
1
vote
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?
1
vote
1answer
103 views

Why does Unix deliver signals this way?

In Unix, when signals are posted, and the receiving process is running more than one thread, at first a thread is chosen to carry out the signal handling routine. I don't understand why that is ...
1
vote
1answer
1k views

Single-threaded program takes too low CPU?

I am using Windows 7 Professional, Intel i7 CPU. I know the i7 has Hyper-Threading and I assume this is the reason. While running a single-threaded program, I saw that it only uses 12-13% CPU in Task ...
1
vote
2answers
417 views

Can hardware virtualisation use threads from processor cores

I have intel i7 processor with 4 physical cores and each one has 2 threads which is total 8 logical cores. I intent to have virtual machine with windows server that will use all processor potential. ...
1
vote
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> ...
1
vote
1answer
90 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 ...
1
vote
1answer
287 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 ...
1
vote
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 ...
1
vote
1answer
164 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/) ...
1
vote
1answer
768 views

Which processor/core is this process/service using?

What can i use to monitor which processor/core/thread an application is using? I have 16 processors and want to know which processor a specific application is using. I am running Windows Server 2003 ...
1
vote
1answer
1k views

Does the Windows scheduler allocate equal length quanta to threads?

Is the time slice (quantum) that the Windows Kernel Dispatcher allocates to threads the same length for every thread, or does it base the size of quantum on the priority of the thread like Linux does? ...
1
vote
0answers
15 views

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.
1
vote
0answers
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 ...
1
vote
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 ...
1
vote
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 ...
1
vote
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 ...
1
vote
1answer
1k views

VirtualBox recognise all threads as cores or only physical cores for dual core Core i7?

When I run VirtualBox (or other virtualisation software) it lets me select how many cores I like to allocate to a virtual machine. Since I have a dual core 2.66gHz Intel Core i7 with hyperthreading, ...
1
vote
2answers
764 views

613 threads limit on debian [closed]

When running this program thread-limit.c on my dedicated debian server, the output says that my system can't create more than around 600 threads. I need to create more threads, and fix my system ...
0
votes
2answers
285 views

Is there a “deep” task manager available in Windows XP akin to Windows 7 and Vista? [duplicate]

Possible Duplicate: Good Alternatives to Windows Task Manager Is there a good task manager or utility for Windows XP that gives deep visibility into the processes and threads running on the ...
0
votes
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 ...
0
votes
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 ...
0
votes
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 ...
0
votes
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? ...
0
votes
1answer
110 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. ...