NPTL

bos_mindwarp · Posted: Thu Apr 03, 2003 1:44 pm Post subject: NPTL

Since gentoo has glibc > 2.3 should it have NPTL(native POSIX thread library)?
Or is there a way of enabling it somehow?

CoronaLover · Posted: Thu Apr 03, 2003 6:52 pm Post subject:

Gentoo has NPTL support in the unstable branch, just make sure you have "nptl" in USE.

skuld · n00b Joined: 13 Oct 2002 Posts: 69

What are the prerequisitives to use NPTL ?

I'm trying to compile glibc with nptl support, and I get this :

CoronaLover · Posted: Thu Apr 03, 2003 8:31 pm Post subject:

To use NPTL you need:
1. GCC 3.2.2-r2.
2. running Linux >=2.5.50.
3. /usr/src/linux symlink pointing to >=2.5.50 kernel sources.

Rhino · Apprentice Joined: 12 Feb 2003 Posts: 177

bos_mindwarp · Posted: Thu Apr 03, 2003 9:57 pm Post subject:

cool thx =)

bos_mindwarp · Posted: Fri Apr 04, 2003 2:23 am Post subject:

Ok, i installed mm-sources kernel, and re-emerged glibc.

The weird thing is I can spawn 256 threads with NPTL, and I could spawn 1024 threads with the old library?

skuld · n00b Joined: 13 Oct 2002 Posts: 69

bos_mindwarp · Posted: Fri Apr 04, 2003 8:00 am Post subject:

ok I found it (stupid me)
max thread count depends on following:
- the value in /proc/sys/kernel/threads-max
- amount of RAM
- stack size (default 8MB i think, tunable with: ulimit -s 64, for 64K stack size, toy with value for reaching your optimal)

asimon · Posted: Fri Apr 04, 2003 8:51 am Post subject:

barlad · l33t Joined: 22 Feb 2003 Posts: 673

Is there any profit in using NPTL? improved performances?

asimon · Posted: Fri Apr 04, 2003 10:33 am Post subject:

knittel · n00b Joined: 29 Nov 2002 Posts: 50

As asked in another post - for the 2.4 Kernel people, what about adding NGPT ?