Very Computer

by **Robe** » Mon, 17 Mar 2003 07:34:12

Hello.
I just read in Linux Magazin 4/2003 that there are lots of different
implementations of POSIX PThreads for linux. (Fe.:NGPT, Linuxthreads
NPTL and more)

So my question is: If I want to program with threads which model is/are
supported with Kernel 2.4.19 right out of the box? I am interested in as
much POSIX as I can get:)

Thanks for advice,
and greetings,
Robert
--

and goes directly into the bin.
To contact me privately reverse and use

by **Neil Horma** » Mon, 17 Mar 2003 10:00:36

> Hello.
> I just read in Linux Magazin 4/2003 that there are lots of different
> implementations of POSIX PThreads for linux. (Fe.:NGPT, Linuxthreads
> NPTL and more)

> So my question is: If I want to program with threads which model is/are
> supported with Kernel 2.4.19 right out of the box? I am interested in as
> much POSIX as I can get:)

> Thanks for advice,
> and greetings,
> Robert

Any of those models mentioned are compatible with the 2.4.19 kernel, and
more (I think that IBM is working on an open source POSIX library right
now thats supposed to have some really neat features). The exact
implementation you get "out of the box" will depend on your distro. I
think Red Hat normally ships with LinuxThreads

Neil

by **Robe** » Mon, 17 Mar 2003 11:15:23

Thank you.
What do you think has SuSE?

Robert

> > Hello.
> > I just read in Linux Magazin 4/2003 that there are lots of different
> > implementations of POSIX PThreads for linux. (Fe.:NGPT, Linuxthreads
> > NPTL and more)

> > So my question is: If I want to program with threads which model is/are
> > supported with Kernel 2.4.19 right out of the box? I am interested in as
> > much POSIX as I can get:)

> > Thanks for advice,
> > and greetings,
> > Robert

> Any of those models mentioned are compatible with the 2.4.19 kernel, and
> more (I think that IBM is working on an open source POSIX library right
> now thats supposed to have some really neat features). The exact
> implementation you get "out of the box" will depend on your distro. I
> think Red Hat normally ships with LinuxThreads

> Neil

--

and goes directly into the bin.
To contact me privately reverse and use

by **Joshua Jone** » Mon, 17 Mar 2003 12:41:10

> I think that IBM is working on an open source POSIX library right
> now thats supposed to have some really neat features.

I guess you're referring to NGPT here? It seems that NPTL is much
better at most things than NGPT, thus its inclusion in 2.5.
And of course, LinuxThreads is just plain bad.

http://www.kegel.com/c10k.html#threads.nptl

--
josh(at)cc.gatech.edu | http://intmain.net:800

527597 local keystrokes since last reboot (52 days ago)

by **David Schwart** » Wed, 19 Mar 2003 10:17:01

> And of course, LinuxThreads is just plain bad.

Other than some fairly minor issues with pids and signals, what's the
problem with LinuxThreads?

DS

by **Joshua Jone** » Wed, 19 Mar 2003 10:49:13

> Other than some fairly minor issues with pids and signals, what's the
> problem with LinuxThreads?

Well, to me those signal issues alone are enough of a headache to
label them a major pain. LinuxThreads also don't really scale that
well... however, it should be noted that this is not just LT's fault;
it's due to the kernel support at the time when LT's were developed
(in 2.0, right?). Thus, it's not really a knock on LT's... it's
time, three major revisions and several years later, for a rework of
the threading for Linux. Here's NPTL's design document, which outlines
some problems and performance graphs:

http://people.redhat.com/drepper/nptl-design.pdf

--
josh(at)cc.gatech.edu | http://intmain.net:800

542931 local keystrokes since last reboot (54 days ago)