pthread and multiple CPU

[noel.yim]

Hi,

First question is:
I want to assign 8 threads to 8 processors (must one to one), when I
initialize the thread, does it guarantee that each CPU has one thread?
or there can be some case such that 4 threads on one process and other
4 thread on 4 processors and 3 processors have no threads at all?

Second question is:
For instance, one processor has 4 jobs running, is it possible to shift
2 of them to other processors? using IPC stuffs? or other methods?


For the above questions, is there any reference links that I can visit?
I am new to threading. Thanks ahead to anyone answer my questions.

 

[Nelu]

Hi,

First question is:
I want to assign 8 threads to 8 processors (must one to one), when I
initialize the thread, does it guarantee that each CPU has one thread?
or there can be some case such that 4 threads on one process and other
4 thread on 4 processors and 3 processors have no threads at all?

Second question is:
For instance, one processor has 4 jobs running, is it possible to shift
2 of them to other processors? using IPC stuffs? or other methods?


For the above questions, is there any reference links that I can visit?
I am new to threading. Thanks ahead to anyone answer my questions.

This is off-topic here. You should ask in a group that's specific to
your OS or to the threading mechanism you're using (I guess it's Linux
or POSIX for pthread).

 

[Keith Thompson]

First question is:
I want to assign 8 threads to 8 processors (must one to one), when I

[...]

Standard C doesn't support threads. Try comp.programming.threads.

 

[tarunjs]

Scheduling algoriths are OS specific, so I guess there is little you as
an application programmer do to allocate a particluar thread to a
particluar CPU

 

[Keith Thompson]

Scheduling algoriths are OS specific, so I guess there is little you as
an application programmer do to allocate a particluar thread to a
particluar CPU

Threads in general are OS specific; comp.programming.threads would be
a better place to discuss them.

And please read <http://cfaj.freeshell.org/google/>.