diff options
| author | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-06-22 20:39:25 +0000 |
|---|---|---|
| committer | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-06-22 20:39:25 +0000 |
| commit | 31712e83a5cbef7bb3af1ad1a7ab271de5c9c4b4 (patch) | |
| tree | c2cc34ab7a462c76b41fcd457b365ba285e84685 /libgomp/iter.c | |
| parent | 777e67996082e503858a25af4fb4c9d6b6b3d546 (diff) | |
| download | gcc-31712e83a5cbef7bb3af1ad1a7ab271de5c9c4b4.tar.gz | |
PR libgomp/49490
* omp-low.c (expand_omp_for_static_nochunk): Only
use n ceil/ nthreads size for the first
n % nthreads threads in the team instead of
all threads except for the last few ones which
get less work or none at all.
* iter.c (gomp_iter_static_next): For chunk size 0
only use n ceil/ nthreads size for the first
n % nthreads threads in the team instead of
all threads except for the last few ones which
get less work or none at all.
* iter_ull.c (gomp_iter_ull_static_next): Likewise.
* env.c (parse_schedule): If OMP_SCHEDULE doesn't have
chunk argument, set run_sched_modifier to 0 for static
resp. 1 for other kinds. If chunk argument is 0
and not static, set value to 1.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@175315 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libgomp/iter.c')
| -rw-r--r-- | libgomp/iter.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/libgomp/iter.c b/libgomp/iter.c index 9ec4dbd2252..cd9484a1ea4 100644 --- a/libgomp/iter.c +++ b/libgomp/iter.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2005, 2008, 2009 Free Software Foundation, Inc. +/* Copyright (C) 2005, 2008, 2009, 2011 Free Software Foundation, Inc. Contributed by Richard Henderson <rth@redhat.com>. This file is part of the GNU OpenMP Library (libgomp). @@ -59,7 +59,7 @@ gomp_iter_static_next (long *pstart, long *pend) trip through the outer loop. */ if (ws->chunk_size == 0) { - unsigned long n, q, i; + unsigned long n, q, i, t; unsigned long s0, e0; long s, e; @@ -74,11 +74,14 @@ gomp_iter_static_next (long *pstart, long *pend) /* Compute the "zero-based" start and end points. That is, as if the loop began at zero and incremented by one. */ q = n / nthreads; - q += (q * nthreads != n); - s0 = q * i; + t = n % nthreads; + if (i < t) + { + t = 0; + q++; + } + s0 = q * i + t; e0 = s0 + q; - if (e0 > n) - e0 = n; /* Notice when no iterations allocated for this thread. */ if (s0 >= e0) |