You seem to be laboring under a misconception or two, here. NPTL is a 1:1
model (it would have been damned convenient for me for it not to have been).
linuxthreads and NPTL will create a native, known-to-the-kernel thread, which
I think you mean by a "kernel thread", in response to a pthread_create(). The
will start life on the same CPU that created it, but normal load balancing will
migrate it elsewhere pretty quickly. If you want to manage thread->CPU binding
explicitly, the sys_sched_setaffinity() system call can be used.
----- Original Message -----
From: "Suprasad Mutalik Desai" <firstname.lastname@example.org>
Sent: Friday, September 28, 2007 7:23 AM
Subject: mapping a userspace thread to a kernelspace thread
> Hi list ,
> I want to know how can we map a userspace thread to a
> kernel thread as mentioned in 1:1 threading model (linuxthreads) or
> M:N model (NPTL) . Does this happen by just calling a
> pthread_create() in the userspace program or i need to do something
> more in the kernel space . i am using 2.6.20 kernel .
> I want to use this for multi threading operation in a SMP
> environment where in i want to schedule a userspace program on another
> processor by spawning a thread . Can anyone help me in this.
> Thanks and regards,