[Bug libgomp/56073] New: SPEComp2012 376.kdtree fails to complete

[Bug libgomp/56073] New: SPEComp2012 376.kdtree fails to complete

[amodra at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56073

             Bug #: 56073
           Summary: SPEComp2012 376.kdtree fails to complete
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgomp
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: amodra@gmail.com
                CC: jakub@gcc.gnu.org


SPEComp2012 376.kdtree shows a huge regression after r182151, with the
benchmark, which finishes normally in a few minutes, failing to complete after
more than 24 hours of running. See
http://gcc.gnu.org/ml/gcc-patches/2011-12/msg00130.html for the offending
patch.

[Bug libgomp/56073] SPEComp2012 376.kdtree fails to complete

[amodra at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56073

Alan Modra <amodra at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2013-01-22
         AssignedTo|unassigned at gcc dot       |amodra at gmail dot com
                   |gnu.org                     |
     Ever Confirmed|0                           |1

[Bug libgomp/56073] SPEComp2012 376.kdtree fails to complete

[amodra at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56073

--- Comment #1 from Alan Modra <amodra at gcc dot gnu.org> 2013-01-22 11:41:57 UTC ---
Author: amodra
Date: Tue Jan 22 11:41:53 2013
New Revision: 195370

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195370
Log:
    PR libgomp/51376
    PR libgomp/56073
    * task.c (GOMP_task): Revert 2011-12-09 change.
    (GOMP_taskwait): Likewise.  Instead use atomic load with acquire
    barrier to read task->children..
    (gomp_barrier_handle_tasks): ..and matching atomic store with
    release barrier here when setting parent->children to NULL.


Modified:
    trunk/libgomp/ChangeLog
    trunk/libgomp/task.c

[Bug libgomp/56073] SPEComp2012 376.kdtree fails to complete

[amodra at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56073

Alan Modra <amodra at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |powerpc64-linux
                URL|                            |http://gcc.gnu.org/ml/gcc-p
                   |                            |atches/2013-01/msg01085.htm
                   |                            |l
   Target Milestone|---                         |4.8.0

[Bug libgomp/56073] SPEComp2012 376.kdtree fails to complete

[amodra at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56073

--- Comment #2 from Alan Modra <amodra at gcc dot gnu.org> 2013-01-24 21:52:04 UTC ---
Author: amodra
Date: Thu Jan 24 21:51:58 2013
New Revision: 195444

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195444
Log:
    PR libgomp/51376
    PR libgomp/56073
    * task.c (GOMP_task): Revert 2011-12-09 change.
    (GOMP_taskwait): Likewise.  Instead use atomic load with acquire
    barrier to read task->children..
    (gomp_barrier_handle_tasks): ..and matching atomic store with
    release barrier here when setting parent->children to NULL.


Added:
    branches/ibm/gcc-4_7-branch/libgomp/ChangeLog.ibm
Modified:
    branches/ibm/gcc-4_7-branch/libgomp/task.c

[Bug libgomp/56073] SPEComp2012 376.kdtree fails to complete

[amodra at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56073

--- Comment #3 from Alan Modra <amodra at gcc dot gnu.org> 2013-02-05 13:40:39 UTC ---
Author: amodra
Date: Tue Feb  5 13:40:25 2013
New Revision: 195756

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195756
Log:
    PR libgomp/51376
    PR libgomp/56073
    * task.c (GOMP_task): Revert 2011-12-09 change.
    (GOMP_taskwait): Likewise.  Instead use atomic load with acquire
    barrier to read task->children..
    (gomp_barrier_handle_tasks): ..and matching atomic store with
    release barrier here when setting parent->children to NULL.


Modified:
    branches/gcc-4_7-branch/libgomp/ChangeLog
    branches/gcc-4_7-branch/libgomp/task.c

[Bug libgomp/56073] SPEComp2012 376.kdtree fails to complete

[amodra at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56073

Alan Modra <amodra at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED

--- Comment #4 from Alan Modra <amodra at gmail dot com> 2013-02-05 13:43:51 UTC ---
Fixed