IBM Support

IV77967: BINDLIST XLSMPOPTS FAILS TO BIND THREADS TO PROCESSORS

Fixes are available

XL C for AIX Fix Pack 5 (November 2015 Update) for 13.1
XL C/C++ for AIX Fix Pack 5 (November 2015 PTF) for 13.1
XL C/C++ Runtime for AIX Fix Pack 4 (November 2015 PTF) for 13.1
XL C/C++ for AIX Fix Pack 6 (February 2016 PTF) for 13.1
XL C for AIX Fix Pack 6 (February 2016 Update) for 13.1
XL C/C++ Runtime for AIX Fix Pack 5 (February 2016 PTF) for 13.1
XL Fortran for AIX Fix Pack 6 (February 2016 Update) for 15.1
XL Fortran Runtime for AIX Fix Pack 6 (February 2016 PTF) for 15.1
XL C for AIX Fix Pack 7 (May 2016 Update) for 13.1
XL C/C++ for AIX Fix Pack 7 (May 2016 PTF) for 13.1
XL Fortran for AIX Fix Pack 7 (May 2016 Update) for 15.1
XL Fortran Runtime for AIX Fix Pack 7 (May 2016 PTF) for 15.1
XL C for AIX Fix Pack 8 (August 2016 Update) for 13.1
XL C/C++ for AIX Fix Pack 8 (August 2016 PTF) for 13.1
XL Fortran for AIX Fix Pack 8 (August 2016 Update) for 15.1
XL Fortran Runtime for AIX Fix Pack 8 (August 2016 PTF) for 15.1
XL C for AIX Fix Pack 9 (June 2017 Update) for 13.1
XL C/C++ for AIX Fix Pack 9 (June 2017 PTF) for 13.1
XL Fortran for AIX Fix Pack 9 (June 2017 Update) for 15.1
XL Fortran Runtime for AIX Fix Pack 9 (June 2017 PTF) for 15.1
XL C for AIX Fix Pack 10 (February 2018 Update) for 13.1
XL C/C++ for AIX Fix Pack 10 (February 2018 PTF) for 13.1
XL Fortran for AIX Fix Pack 10 (February 2018 PTF) for 15.1
XL Fortran Runtime for AIX Fix Pack 10 (February 2018 PTF) for 15.1
XL Fortran for AIX Fix Pack 5 (November 2015 Update) for 15.1
XL Fortran Runtime for AIX Fix Pack 5 (November 2015 PTF) for 15.1
XL C/C++ for AIX Fix Pack 11 (November 2018 PTF) for 13.1
XL C for AIX Fix Pack 11 (November 2018) for 13.1

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APAR status

  • Closed as program error.

Error description

  • On some AIX machines, the runtime is failing to bind threads to
    processors. With the following settings
    for a 2 tasks job and with XLSMPOPTS set to:
       0:XLSMPOPTS=parthds=2:bindlist=PROC=0,2
       1:XLSMPOPTS=parthds=2:bindlist=PROC=4,6
    
    the following error messages may be visible:
    0:1587-121 SMP runtime library error. Could not bind thread to
    processor 0.
       0:1587-121 SMP runtime library error. Could not bind thread
    to processor 32.
       1:1587-121 SMP runtime library error. Could not bind thread
    to processor 0.
       1:1587-121 SMP runtime library error. Could not bind thread
    to processor 32.
    

Local fix

  • N/A
    

Problem summary

  • USERS AFFECTED:
    Users of XLSMPOPTS with the bindlist suboption may be affected
    by this issue.
    
    
    PROBLEM DESCRIPTION:
    An internal call creats an OpenMP instance which fails to binds
    the threads to the processes.
    

Problem conclusion

  • The XLSMP runtime has been fixed so that the threads are now
    bound to the processes.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV77967

  • Reported component name

    XL SMP AIX

  • Reported component ID

    5725C7401

  • Reported release

    410

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2015-10-13

  • Closed date

    2015-10-14

  • Last modified date

    2015-10-14

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

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

Fix information

  • Fixed component name

    XL SMP AIX

  • Fixed component ID

    5725C7401

Applicable component levels

  • R410 PSY

       UP



Document information

More support for: XL Fortran for AIX

Software version: 15.1

Reference #: IV77967

Modified date: 14 October 2015