Login or Register to Ask a Question and Join Our Community


UNIX for Advanced & Expert Users

pthread

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums UNIX for Advanced & Expert Users pthread
# 1  
Old 03-30-2010
pthread
I am so confused about the user threads and kernel threads.Suppose I created a thread using pthread create call in Linux ,whether it will be a user thread or kernel thread.If it user thread,then how its map to kernel thread.

I heard about the M:1,M:N,1:1 mapping methods.Which method linux is implemented?I need to achieve the mutiprocessor benefit,which mapping technique is good for me.Whether this capability is provide by the pthread library or the operating system
# 2  
Old 04-05-2010
Linux is 1:1 , and so are you ... :)
Linux uses the 1:1 thread mapping model, which means that every single user-mode thread is mapped to a single kernel thread.

You - the user - run a program in user-mode, with user threads ;

If you want to benefit from multicore hardware (or hardware multithreading), then the 1:1 approach fits your needs ;

Good luck, and success !
alexandre botao
<< botao {dot} org >>
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Programming

pthread()

I have a while loop like so: while (counter (file1)); how can I pass that into a pthread_create()? I was thinking ... while(pthread_create(&path, NULL, counter, file)); is that right? (1 Reply)
Discussion started by: l flipboi l
1 Replies

2. Programming

Help with pthread error

I have written a C code and when i compile it there are 0 warnings and 0 errors, but when i try to run apears: ./client: symbol lookup error: ./client: undefined symbol: pthread_create, version GLIBC_2.1 the part of the code where i have the pthread_creat is: int serverConection(int... (5 Replies)
Discussion started by: SuperStout
5 Replies

3. Ubuntu

pthread problem

Hi all, I wrote some code in c, using pthread (I configured the linker and compiler in eclipse IDE first). #include <pthread.h> #include "starter.h" #include "UI.h" Page* MM; Page* Disk; PCB* all_pcb_array; void* display_prompt(void *id){ printf("Hello111\n"); return... (1 Reply)
Discussion started by: elad2109
1 Replies

4. Programming

Error with Pthread

problem solved edited, sorry (1 Reply)
Discussion started by: joey
1 Replies

5. UNIX for Dummies Questions & Answers

a pthread problem

Hello, I run my pthread code on Linux with 4 processors. However, the speed up is only 2 times. The code is about solving equation (G+s(i)C)z(i)=B*us(i), i=1,...,n. Here G,C are m*m matrix, B*us(i) is a m*1 vector and s(i) are n different numbers. I need to solve the equation n times to... (2 Replies)
Discussion started by: mgig
2 Replies

6. Solaris

pthread problem

Hi all! I am working on unix systems.I am programming in c. I have got some problems with pthread.when I use pthread_create to creat a thread it says: (.text+0x3a): undefined reference to `pthread_create'. same is the problm with pthread_kill. Can anyone help me out here. Thanks. vij. (2 Replies)
Discussion started by: vijlak
2 Replies

7. UNIX for Dummies Questions & Answers

Where are the pthread functions??

When I use some of the pthread functions: pthread_join, pthread_exit they work perfect. But when I look in the pthread.h file I can't seem to find any implementations of the functions...where are they hiding?? (2 Replies)
Discussion started by: bigblop
2 Replies

8. Programming

pthread.h

hallo 2 al can anyone pls tell me where and how can i find and install the pthread.h lib ? thx :cool: (2 Replies)
Discussion started by: XinU*
2 Replies

9. Programming

pthread

consider if the thread routine returns any void pointer while calling pthread_join, the thread resources are freed and the thread will be terminated when the main thread is exit ,that is my assumption whether it is true how do we find whether the thread is alive or terminated how do we find... (0 Replies)
Discussion started by: MKSRaja
0 Replies

10. Programming

More about Pthread

Can someone point to a link where I can get good info about pthread? thanx.. :) (1 Reply)
Discussion started by: jyotipg
1 Replies
Login or Register to Ask a Question