[ILUG] Semaphores

[Mark Fallon]

Hi,

I am looking at using semaphores in a small project I am 
working on. So I was poking around the Linux man pages.
I was surprised to find there was no man pages for Posix
Semaphores with my distribution (RH 6.2). They do exist,
they are in libpthread

But real question:
Posix Semaphores (sem_open, sem_close......) should be faster
as they should be implemented in shared memory in user space.
System V are usually implemented in the kernel space so involve
context switches etc.

I was trying to come up with the best way to benchmark them
and I was wondering if anyone new of any other trade-offs
between the two, and do all dists come with libpthread.

Regards,

Mark
-- 
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Mark Fallon			E-mail : Mark.Fallon at oracle.com
Senior Software Engineer	Phone  : +353-1-8033207
Global Product Engineering	Fax    : +353-1-8033221
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