On Sat, Oct 13, 2012 at 12:10 PM, Mark Knecht <markkne...@gmail.com> wrote: > On Sat, Oct 13, 2012 at 9:15 AM, Canek Peláez Valdés <can...@gmail.com> wrote: > <SNIP> >> >> We can only know seeing the code. Timur, this is the little test I >> made which creates 5 threads and runs them for 1 minute. In my case, >> `ps x` shows only 1 PID, care to give it a try? >> >> ---------------------- >> #include <pthread.h> <<====== >> #include <unistd.h> >> #include <stdlib.h> >> #include <stdio.h> > > Thanks for the test case. Like you I see only one thread. However the > test case wouldn't compile for me without the -pthread option so it > makes me wonder what happens to a program like I had pointed to > yesterday that uses the old style threading that did create lots of > process ids? Possibly an nptl system would still generate lots of ids > for that program and that's what he's seeing? > > Just curious. I don't program but I'm always sort of interested.
You got your answer. NTPL stands for Native POSIX Thread *Library*. As it name says, it is a library (with support in the kernel and in glibc). If you don't use the library (-lpthread), you cannot make use of its advantages. What "old style threading" did you use for your test case? Regards. -- Canek Peláez Valdés Posgrado en Ciencia e Ingeniería de la Computación Universidad Nacional Autónoma de México
