topic Error during thread creation. in Operating System - HP-UX

Error during thread creation.

Saurav Narain — Tue, 13 Sep 2005 00:38:06 GMT

Hi All,
We are working on a multi threaded application on an HPUX machine. After creating n (i call it n because its variable) number of threads (not running simultaneously) the pthread_create returns an error (ENOMEM), no memory available.

At a time there are maximum 10 threads running simultaneously. That is guaranteed. How ever the application brings up threads (maximum 10) as an when the load on the application increases.

From limits.h
/*
* number of threads per process
*/
# define _POSIX_THREAD_THREADS_MAX 64

What could be causing this error and how do we rectify it? Will compiling the code as a 64 bit executable help?

Thanks,
Saurav.

Re: Error during thread creation.

RAC_1 — Tue, 13 Sep 2005 01:12:32 GMT

Check your kernel settings.

max_thread_proc and nkthread

Also, check, ulimit -Sa and ulimit -Ha befire you start your apps.

Re: Error during thread creation.

Alessandro Pilati — Tue, 13 Sep 2005 03:26:53 GMT

Saurav,
check also your application, for thread allocation.

this link may be useful:
http://h21007.www2.hp.com/dspp/tech/tech_TechSingleTipDetailPage_IDX/1,2366,150,00.html

Regards,
Alex