Subj : Re: why my threads do not wake up
To   : comp.programming.threads
From : David Schwartz
Date : Wed Aug 24 2005 06:40 pm


"Jingbo" <jingbo@cadence.com> wrote in message 
news:1124929139.894122.292650@o13g2000cwo.googlegroups.com...

> OK, here is a program to demostrate the problem.
> Compile with:  CC -mt ttt.C -lpthread
> After I ran it, only one thread is on CPU. After several times of
> running "pstack" command, all 8 threads is running.

    Your program is only guaranteed to make forward progress, not to make 
forward progress at the maximum possible rate. You could create your threads 
with system contention scope or call pthread_set_concurrency. (Or use a more 
realistic mix of computation and I/O.)

    DS

.