Ritesh
On 7/20/06, Parav Pandit <paravpandit@xxxxxxxxx> wrote:
Hi Ritesh,
Can you tell me how can I enable this support or how
can I use the NPTL library in my linux kernel 2.6.10?
Any flags to put in Makefile or something else?
Parav
--- Ritesh Kumar < ritesh@xxxxxxxxxx> wrote:
> Can you post the output of the command
> /lib/libc-2.x.x.so?
> Look out for the kind of thread implementation you
> are using. If its
> linuxthreads then you are using an old (and not very
> POSIX compliant)
> threading library on linux. On linux 2.6 you have
> the option of NPTL support
> in glibc which is a newer better threading library
> which shouldn't show you
> this weirdness.
>
> linuxthreads uses a separate "helper thread" for
> managing the other threads
> of a process. This explains your extra thread.
>
> Ritesh
>
>
> On 7/19/06, Parav Pandit <paravpandit@xxxxxxxxx>
> wrote:
> >
> > Hi,
> >
> > I have created 4 threads in my linux system using
> > pthread_create() API.
> > Each thread does nothing but just sleeps using
> > sleep().
> >
> > e.g.
> > int main()
> > {
> > pthread_create(thread1);
> > pthread_create(thread2);
> > pthread_create(thread3);
> > pthread_create(thread4);
> > while(1) {
> > };
> > return 0;
> > }
> >
> > Here are the results of "top".
> >
> > Before running above program,
> > total process = 35
> > sleeping process = 34,
> > running = 1.
> >
> > After running about program,
> > total process = 41
> > sleeping process = 39,
> > running = 2.
> >
> > Can somebody give me justification for this
> addition
> > of one more process for this?
> > We know that threads = processes = task_struct in
> > kernel when it comes to scheduling them.
> >
> > But why there is an overhead of one more
> > thread/process?
> >
> > Regards,
> > Parav Pandit
> >
> >
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