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Add debug trace message for hierarchical barrier 

Trace when thread is waiting at join phase for oncore children.

llvm-svn: 252954
This commit is contained in:
Jonathan Peyton 2015-11-12 21:40:39 +00:00
parent d6c8de1ef2
commit 90862c40ad
1 changed files with 2 additions and 0 deletions
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2
openmp/runtime/src/kmp_barrier.cpp
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@ -766,6 +766,8 @@ __kmp_hierarchical_barrier_gather(enum barrier_type bt, kmp_info_t *this_thr,
if (__kmp_dflt_blocktime == KMP_MAX_BLOCKTIME && thr_bar->use_oncore_barrier) {
if (thr_bar->leaf_kids) { // First, wait for leaf children to check-in on my b_arrived flag
kmp_uint64 leaf_state = KMP_MASTER_TID(tid) ? thr_bar->b_arrived | thr_bar->leaf_state : team->t.t_bar[bt].b_arrived | thr_bar->leaf_state;
KA_TRACE(20, ("__kmp_hierarchical_barrier_gather: T#%d(%d:%d) waiting for leaf kids\n",
gtid, team->t.t_id, tid));
kmp_flag_64 flag(&thr_bar->b_arrived, leaf_state);
flag.wait(this_thr, FALSE
USE_ITT_BUILD_ARG(itt_sync_obj) );