Spawn more than 8 threads OpenMP & HPUX Post: 302741143

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Operating Systems HP-UX Spawn more than 8 threads OpenMP & HPUX Post 302741143 by ATveretinov on Friday 7th of December 2012 01:12:22 PM

12-07-2012

Registered User

Spawn more than 8 threads OpenMP & HPUX

Hi folks,

I am trying to run more than 8 threads in OpenMP team on my HP-UX 11i v3 system (without root access), but NO success.

Compiler: aCC A.06.26
I tried to setup: OMP_NUM_THREADS, omp_set_num_threads(), max_thread_proc=1000, nkthread=8416, set_dynamic=0

Machine has 2 processors with 4 cores. So, the system shows me 8 processors.

If I do the same but compile with g++ I can spawn more threads, but I need aCC.

I guess maybe it's OpenMP version 2, because on this version I cannot even setup OMP_THREAD_LIMIT (system cannot find this variable).

code:

Code:

omp_set_dynamic(0);
omp_set_num_threads(20);
#pragma omp parallel
{
      printf("OMP_NUM_THREADS=%d, m=%d\n", omp_get_num_threads(), omp_get_max_threads());
}

output:
omp_in_parallel=0, omp_get_dynamic=0, omp_get_thread_limit=0
OMP_NUM_THREADS=8, m=8
OMP_NUM_THREADS=8, m=8
OMP_NUM_THREADS=8, m=8
OMP_NUM_THREADS=8, m=8
OMP_NUM_THREADS=8, m=8
OMP_NUM_THREADS=8, m=8
OMP_NUM_THREADS=8, m=8
OMP_NUM_THREADS=8, m=8

Any ideas?

Thank you for help.
Alexander.

Last edited by Corona688; 12-07-2012 at 02:40 PM..

ATveretinov

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cmtk-asegment

asegment(1)					       The Computational Morphometry Toolkit					       asegment(1)

NAME

       asegment - Atlas-based segmentation

SYNOPSIS

       asegment TargetImage AtlasImage AtlasLabels OutputImage

DESCRIPTION

       Register a target image to an atlas, using affine followed by nonrigid B-spline registration, then reformat the atlas label map to the tar-
       get image.

OPTIONS

   Global Toolkit Options (these are shared by all CMTK tools)
       --help
	    Write list of basic command line options to standard output.

       --help-all
	    Write complete list of basic and advanced command line options to standard output.

       --wiki
	    Write list of command line options to standard output in MediaWiki markup.

       --man
	    Write man page source in 'nroff' markup to standard output.

       --xml
	    Write command line syntax specification in XML markup (for Slicer integration).

       --version
	    Write toolkit version to standard output.

       --echo
	    Write the current command line to standard output.

       --verbose-level <integer>
	    Set verbosity level.

       --verbose, -v
	    Increment verbosity level by 1 (deprecated; supported for backward compatibility).

       --threads <integer>
	    Set maximum number of parallel threads (for POSIX threads and OpenMP).

   Main Options
       --fast, -f
	    Fast mode.

AUTHORS

       Torsten Rohlfing, with contributions from Michael P. Hasak, Greg Jefferis, Calvin R. Maurer, and Daniel B. Russakoff

LICENSE

       http://www.fsf.org/licensing/licenses/gpl.html

BUGS

       Report bugs at http://nitrc.org/projects/cmtk/

ACKNOWLEDGMENTS

       From April 2009 through September 2011, CMTK Development and Maintenance was supported by the National Institute of Biomedical Imaging  and
       Bioengineering under Grant No.R01 EB008381 (PI: Torsten Rohlfing).

CMTK 2.2.2							    Jul 20 2012 						       asegment(1)