IV29473: TEST FAILURES WITH LARGE OPENMP THREAD COUNTS.

November 2012 PTF for XL C for AIX, V12.1
November 2012 PTF for XL C/C++ for AIX, V12.1
March 2013 PTF for XL C for AIX, V12.1
March 2013 PTF for XL C/C++ for AIX, V12.1
March 2013 PTF for XL Fortran Runtime for AIX, V14.1
XL C/C++ for AIX Fix Pack 4 (June 2013 PTF) for 12.1
XL C/C++ for AIX Fix Pack 5 (September 2013 PTF) for 12.1
XL Fortran Runtime for AIX Fix Pack 5 (September 2013 PTF) for 14.1
XL C/C++ for AIX Fix Pack 7 (January 2014 PTF) for 12.1
XL C for AIX Fix Pack 8 (March 2014 PTF) for 12.1
XL C/C++ for AIX Fix Pack 8 (March 2014 PTF) for 12.1
XL C/C++ for AIX Fix Pack 11 (February 2015 PTF) for 12.1
XL C for AIX Fix Pack 12 (May 2015 PTF) for 12.1
XL C/C++ for AIX Fix Pack 12 (May 2015 PTF) for 12.1
XL Fortran for AIX Fix Pack 11 (May 2015 PTF) for 14.1
XL Fortran Runtime for AIX Fix Pack 11 (May 2015 PTF) for 14.1
XL C/C++ for AIX Fix Pack 13 (August 2015 Update) for 12.1
XL Fortran for AIX Fix Pack 12 (August 2015 Update) for 14.1
XL C/C++ for AIX Fix Pack 14 (December 2015 Update) for 12.1
XL C for AIX Fix Pack 15 (April 2016 Update) for 12.1
XL C/C++ for AIX Fix Pack 15 (April 2016 Update) for 12.1
XL Fortran for AIX Fix Pack 15 (April 2016 Update) for 14.1
XL Fortran Runtime for AIX Fix Pack 15 (April 2016 Update) for 14.1
XL C for AIX Fix Pack 16 (July 2016 Update) for 12.1
XL C/C++ for AIX Fix Pack 16 (July 2016 Update) for 12.1
XL Fortran for AIX Fix Pack 16 (July 2016 Update) for 14.1
XL Fortran Runtime for AIX Fix Pack 16 (July 2016 Update) for 14.1
XL C/C++ for AIX Fix Pack 17 (November 2016 Update) for 12.1
XL C for AIX Fix Pack 17 (November 2016 Update) for 12.1
XL Fortran for AIX Fix Pack 17 (November 2016 Update) for 14.1
XL Fortran Runtime for AIX Fix Pack 17 (November 2016 Update) for 14.1
XL C for AIX Fix Pack 18 (February 2017 Update) for 12.1
XL C/C++ for AIX Fix Pack 18 (February 2017 Update) for 12.1
XL Fortran for AIX Fix Pack 18 (February 2017 Update) for 14.1
XL Fortran Runtime for AIX Fix Pack 18 (February 2017 Update) for 14.1
XL C for AIX Fix Pack 19 (August 2017 Update) for 12.1
XL C/C++ for AIX Fix Pack 19 (August 2017 Update) for 12.1
XL Fortran for AIX Fix Pack 19 (August 2017 Update) for 14.1
XL Fortran Runtime for AIX Fix Pack 19 (August 2017 Update) for 14.1
XL C for AIX Fix Pack 20 (March 2018 Update) for 12.1
XL C/C++ for AIX Fix Pack 20 (March 2018 Update) for 12.1
November 2012 PTF for XL Fortran for AIX, V14.1
November 2012 PTF for XL Fortran Runtime for AIX, V14.1
March 2013 PTF for XL Fortran for AIX, V14.1
XL C for AIX Fix Pack 4 (June 2013 PTF) for 12.1
XL Fortran for AIX Fix Pack 4 (June 2013 PTF) for 14.1
XL Fortran Runtime for AIX Fix Pack 4 (June 2013 PTF) for 14.1
XL C for AIX Fix Pack 5 (September 2013 PTF) for 12.1
XL Fortran for AIX Fix Pack 5 (September 2013 PTF) for 14.1
XL C for AIX Fix Pack 6 (December 2013 PTF) for 12.1
XL C/C++ for AIX Fix Pack 6 (December 2013 PTF) for 12.1
XL Fortran for AIX Fix Pack 6 (December 2013 PTF) for 14.1
XL Fortran Runtime for AIX Fix Pack 6 (December 2013 PTF) for 14.1
XL C for AIX Fix Pack 7 (January 2014 PTF) for 12.1
XL Fortran for AIX Fix Pack 7 (March 2014 PTF) for 14.1
XL Fortran Runtime for AIX Fix Pack 7 (March 2014 PTF) for 14.1
XL C for AIX Fix Pack 9 (July 2014 PTF) for 12.1
XL C/C++ for AIX Fix Pack 9 (July 2014 PTF) for 12.1
XL Fortran for AIX Fix Pack 8 (July 2014 PTF) for 14.1
XL Fortran Runtime for AIX Fix Pack 8 (July 2014 PTF) for 14.1
XL C for AIX Fix Pack 10 (October 2014 PTF) for 12.1
XL C/C++ for AIX Fix Pack 10 (October 2014 PTF) for 12.1
XL Fortran for AIX Fix Pack 9 (October 2014 PTF) for 14.1
XL Fortran Runtime for AIX Fix Pack 9 (October 2014 PTF) for 14.1
XL C for AIX Fix Pack 11 (February 2015 PTF) for 12.1
XL Fortran for AIX Fix Pack 10 (February 2015 PTF) for 14.1
XL Fortran Runtime for AIX Fix Pack 10 (February 2015 PTF) for 14.1
XL C for AIX Fix Pack 13 (August 2015 Update) for 12.1
XL Fortran Runtime for AIX Fix Pack 12 (August 2015 Update) for 14.1
XL C for AIX Fix Pack 14 (December 2015 Update) for 12.1
XL Fortran for AIX Fix Pack 14 (December 2015 Update) for 14.1
XL Fortran Runtime for AIX Fix Pack 14 (December 2015 Update) for 14.1
XL C/C++ for AIX Fix Pack 21 (January 2019 Update) for 12.1
XL C for AIX Fix Pack 21 (January 2019 Update) for 12.1

APAR status

• Closed as program error.

Error description

• When running test cases in 32 bit mode that make use of large
  OpenMP thread counts, the resulting binary produces one of the
  following issues:
  
  * Illegal instructions
  * Segmentation violations
  * Internal errors reported by MPI
     (e.g. ERROR: 0032-117 User pack or receive buffer is too
  small  (22960) in MPI_Recv )
  * Internal errors reported by the application.
  

Local fix

• n/a
  

Problem summary

• Users Affected:
  Users who have test cases that make use of large OpenMP thread
  counts are potentially affected by this issue.
  
  Problem Description:
  The internal implementation of certain OpenMP tasks were missing
  a lock and was optimized incorrectly.
  

Problem conclusion

• The OpemMP has been fixed.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  LI77164

Fix information

• Fixed component name

  XL SMP AIX

• Fixed component ID

  5725C7401

Applicable component levels