[KLUG Programming] Pthreads problem

[Peter Buxton]

On Tue, Dec 30, 2003 at 11:01:09AM -0500, Alan Mink was only escaped
   alone to tell thee:

> I'm having some shared memory/size (??) problems using threads. Is
> POSIX threads under Linux stable?

What version of Linux? As I recall, Red Hat 9.0 backported the new
Native POSIX Thread Library (NPTL) to 2.4. That might have bugs.

Remember that Linuxthreads != pthreads. There is some mapping to get one
to match the other. The new NPTL implementation closes this gap.

> I originally had very large data arrays over 136 MBytes. I had reduced
> it to around 70 MBytes.  Just yesterday, for debugging, I reduced it
> to ~100 KBytes and it seemed to work!?!?  Could there be some memory
> limitations involved? 

What is listed in '/proc/sys/kernel/shmmax'? On my 2.6 kernel, it is
33554432 (32 MB). 

-- 
What women and psychologists call 'dropping
your armor,' we call 'baring our neck.'