-/* Copyright (C) 2005 Free Software Foundation, Inc.
+/* Copyright (C) 2005, 2008, 2009 Free Software Foundation, Inc.
Contributed by Richard Henderson <rth@redhat.com>.
This file is part of the GNU OpenMP Library (libgomp).
Libgomp is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3, or (at your option)
+ any later version.
Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
- FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
+ FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
- You should have received a copy of the GNU Lesser General Public License
- along with libgomp; see the file COPYING.LIB. If not, write to the
- Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
- MA 02110-1301, USA. */
+ Under Section 7 of GPL version 3, you are granted additional
+ permissions described in the GCC Runtime Library Exception, version
+ 3.1, as published by the Free Software Foundation.
-/* As a special exception, if you link this library with other files, some
- of which are compiled with GCC, to produce an executable, this library
- does not by itself cause the resulting executable to be covered by the
- GNU General Public License. This exception does not however invalidate
- any other reasons why the executable file might be covered by the GNU
- General Public License. */
+ You should have received a copy of the GNU General Public License and
+ a copy of the GCC Runtime Library Exception along with this program;
+ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+ <http://www.gnu.org/licenses/>. */
/* This file handles the LOOP (FOR/DO) construct. */
-#include "libgomp.h"
+#include <limits.h>
#include <stdlib.h>
+#include "libgomp.h"
/* Initialize the given work share construct from the given arguments. */
? start : end;
ws->incr = incr;
ws->next = start;
+ if (sched == GFS_DYNAMIC)
+ {
+ ws->chunk_size *= incr;
+
+#ifdef HAVE_SYNC_BUILTINS
+ {
+ /* For dynamic scheduling prepare things to make each iteration
+ faster. */
+ struct gomp_thread *thr = gomp_thread ();
+ struct gomp_team *team = thr->ts.team;
+ long nthreads = team ? team->nthreads : 1;
+
+ if (__builtin_expect (incr > 0, 1))
+ {
+ /* Cheap overflow protection. */
+ if (__builtin_expect ((nthreads | ws->chunk_size)
+ >= 1UL << (sizeof (long)
+ * __CHAR_BIT__ / 2 - 1), 0))
+ ws->mode = 0;
+ else
+ ws->mode = ws->end < (LONG_MAX
+ - (nthreads + 1) * ws->chunk_size);
+ }
+ /* Cheap overflow protection. */
+ else if (__builtin_expect ((nthreads | -ws->chunk_size)
+ >= 1UL << (sizeof (long)
+ * __CHAR_BIT__ / 2 - 1), 0))
+ ws->mode = 0;
+ else
+ ws->mode = ws->end > (nthreads + 1) * -ws->chunk_size - LONG_MAX;
+ }
+#endif
+ }
}
/* The *_start routines are called when first encountering a loop construct
{
struct gomp_thread *thr = gomp_thread ();
+ thr->ts.static_trip = 0;
if (gomp_work_share_start (false))
- gomp_loop_init (thr->ts.work_share, start, end, incr,
- GFS_STATIC, chunk_size);
- gomp_mutex_unlock (&thr->ts.work_share->lock);
+ {
+ gomp_loop_init (thr->ts.work_share, start, end, incr,
+ GFS_STATIC, chunk_size);
+ gomp_work_share_init_done ();
+ }
return !gomp_iter_static_next (istart, iend);
}
bool ret;
if (gomp_work_share_start (false))
- gomp_loop_init (thr->ts.work_share, start, end, incr,
- GFS_DYNAMIC, chunk_size);
+ {
+ gomp_loop_init (thr->ts.work_share, start, end, incr,
+ GFS_DYNAMIC, chunk_size);
+ gomp_work_share_init_done ();
+ }
#ifdef HAVE_SYNC_BUILTINS
- gomp_mutex_unlock (&thr->ts.work_share->lock);
ret = gomp_iter_dynamic_next (istart, iend);
#else
+ gomp_mutex_lock (&thr->ts.work_share->lock);
ret = gomp_iter_dynamic_next_locked (istart, iend);
gomp_mutex_unlock (&thr->ts.work_share->lock);
#endif
bool ret;
if (gomp_work_share_start (false))
- gomp_loop_init (thr->ts.work_share, start, end, incr,
- GFS_GUIDED, chunk_size);
+ {
+ gomp_loop_init (thr->ts.work_share, start, end, incr,
+ GFS_GUIDED, chunk_size);
+ gomp_work_share_init_done ();
+ }
#ifdef HAVE_SYNC_BUILTINS
- gomp_mutex_unlock (&thr->ts.work_share->lock);
ret = gomp_iter_guided_next (istart, iend);
#else
+ gomp_mutex_lock (&thr->ts.work_share->lock);
ret = gomp_iter_guided_next_locked (istart, iend);
gomp_mutex_unlock (&thr->ts.work_share->lock);
#endif
GOMP_loop_runtime_start (long start, long end, long incr,
long *istart, long *iend)
{
- switch (gomp_run_sched_var)
+ struct gomp_task_icv *icv = gomp_icv (false);
+ switch (icv->run_sched_var)
{
case GFS_STATIC:
- return gomp_loop_static_start (start, end, incr, gomp_run_sched_chunk,
+ return gomp_loop_static_start (start, end, incr, icv->run_sched_modifier,
istart, iend);
case GFS_DYNAMIC:
- return gomp_loop_dynamic_start (start, end, incr, gomp_run_sched_chunk,
+ return gomp_loop_dynamic_start (start, end, incr, icv->run_sched_modifier,
istart, iend);
case GFS_GUIDED:
- return gomp_loop_guided_start (start, end, incr, gomp_run_sched_chunk,
+ return gomp_loop_guided_start (start, end, incr, icv->run_sched_modifier,
istart, iend);
+ case GFS_AUTO:
+ /* For now map to schedule(static), later on we could play with feedback
+ driven choice. */
+ return gomp_loop_static_start (start, end, incr, 0, istart, iend);
default:
abort ();
}
{
struct gomp_thread *thr = gomp_thread ();
+ thr->ts.static_trip = 0;
if (gomp_work_share_start (true))
{
gomp_loop_init (thr->ts.work_share, start, end, incr,
GFS_STATIC, chunk_size);
gomp_ordered_static_init ();
+ gomp_work_share_init_done ();
}
- gomp_mutex_unlock (&thr->ts.work_share->lock);
return !gomp_iter_static_next (istart, iend);
}
bool ret;
if (gomp_work_share_start (true))
- gomp_loop_init (thr->ts.work_share, start, end, incr,
- GFS_DYNAMIC, chunk_size);
+ {
+ gomp_loop_init (thr->ts.work_share, start, end, incr,
+ GFS_DYNAMIC, chunk_size);
+ gomp_mutex_lock (&thr->ts.work_share->lock);
+ gomp_work_share_init_done ();
+ }
+ else
+ gomp_mutex_lock (&thr->ts.work_share->lock);
ret = gomp_iter_dynamic_next_locked (istart, iend);
if (ret)
bool ret;
if (gomp_work_share_start (true))
- gomp_loop_init (thr->ts.work_share, start, end, incr,
- GFS_GUIDED, chunk_size);
+ {
+ gomp_loop_init (thr->ts.work_share, start, end, incr,
+ GFS_GUIDED, chunk_size);
+ gomp_mutex_lock (&thr->ts.work_share->lock);
+ gomp_work_share_init_done ();
+ }
+ else
+ gomp_mutex_lock (&thr->ts.work_share->lock);
ret = gomp_iter_guided_next_locked (istart, iend);
if (ret)
GOMP_loop_ordered_runtime_start (long start, long end, long incr,
long *istart, long *iend)
{
- switch (gomp_run_sched_var)
+ struct gomp_task_icv *icv = gomp_icv (false);
+ switch (icv->run_sched_var)
{
case GFS_STATIC:
return gomp_loop_ordered_static_start (start, end, incr,
- gomp_run_sched_chunk,
+ icv->run_sched_modifier,
istart, iend);
case GFS_DYNAMIC:
return gomp_loop_ordered_dynamic_start (start, end, incr,
- gomp_run_sched_chunk,
+ icv->run_sched_modifier,
istart, iend);
case GFS_GUIDED:
return gomp_loop_ordered_guided_start (start, end, incr,
- gomp_run_sched_chunk,
+ icv->run_sched_modifier,
istart, iend);
+ case GFS_AUTO:
+ /* For now map to schedule(static), later on we could play with feedback
+ driven choice. */
+ return gomp_loop_ordered_static_start (start, end, incr,
+ 0, istart, iend);
default:
abort ();
}
switch (thr->ts.work_share->sched)
{
case GFS_STATIC:
+ case GFS_AUTO:
return gomp_loop_static_next (istart, iend);
case GFS_DYNAMIC:
return gomp_loop_dynamic_next (istart, iend);
switch (thr->ts.work_share->sched)
{
case GFS_STATIC:
+ case GFS_AUTO:
return gomp_loop_ordered_static_next (istart, iend);
case GFS_DYNAMIC:
return gomp_loop_ordered_dynamic_next (istart, iend);
long incr, enum gomp_schedule_type sched,
long chunk_size)
{
- struct gomp_work_share *ws;
+ struct gomp_team *team;
- num_threads = gomp_resolve_num_threads (num_threads);
- ws = gomp_new_work_share (false, num_threads);
- gomp_loop_init (ws, start, end, incr, sched, chunk_size);
- gomp_team_start (fn, data, num_threads, ws);
+ num_threads = gomp_resolve_num_threads (num_threads, 0);
+ team = gomp_new_team (num_threads);
+ gomp_loop_init (&team->work_shares[0], start, end, incr, sched, chunk_size);
+ gomp_team_start (fn, data, num_threads, team);
}
void
unsigned num_threads, long start, long end,
long incr)
{
+ struct gomp_task_icv *icv = gomp_icv (false);
gomp_parallel_loop_start (fn, data, num_threads, start, end, incr,
- gomp_run_sched_var, gomp_run_sched_chunk);
+ icv->run_sched_var, icv->run_sched_modifier);
}
/* The GOMP_loop_end* routines are called after the thread is told that
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