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[OMPT] Reduce overhead of OMPT

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* Avoid computing state needed only by OMPT unless the ompt_enabled flag is set.
* Properly handle a corner case in OMPT where team == NULL.

Patch by John Mellor-Crummey

Differential Revision: http://reviews.llvm.org/D13502

llvm-svn: 249857
This commit is contained in:
Jonathan Peyton 2015-10-09 17:42:52 +00:00
parent cca800207a
commit f0344bb02b
3 changed files with 14 additions and 6 deletions
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8
openmp/runtime/src/kmp_csupport.c
View File

@ -1485,12 +1485,12 @@ __kmpc_for_static_fini( ident_t *loc, kmp_int32 global_tid )
KE_TRACE( 10, ("__kmpc_for_static_fini called T#%d\n", global_tid)); KE_TRACE( 10, ("__kmpc_for_static_fini called T#%d\n", global_tid));
#if OMPT_SUPPORT && OMPT_TRACE #if OMPT_SUPPORT && OMPT_TRACE
kmp_info_t *this_thr = __kmp_threads[ global_tid ];
kmp_team_t *team = this_thr -> th.th_team;
int tid = __kmp_tid_from_gtid( global_tid );
if (ompt_enabled && if (ompt_enabled &&
ompt_callbacks.ompt_callback(ompt_event_loop_end)) { ompt_callbacks.ompt_callback(ompt_event_loop_end)) {
kmp_info_t *this_thr = __kmp_threads[ global_tid ];
kmp_team_t *team = this_thr -> th.th_team;
int tid = __kmp_tid_from_gtid( global_tid );
ompt_callbacks.ompt_callback(ompt_event_loop_end)( ompt_callbacks.ompt_callback(ompt_event_loop_end)(
team->t.ompt_team_info.parallel_id, team->t.ompt_team_info.parallel_id,
team->t.t_implicit_task_taskdata[tid].ompt_task_info.task_id); team->t.t_implicit_task_taskdata[tid].ompt_task_info.task_id);

10
openmp/runtime/src/kmp_sched.cpp
View File

@ -97,8 +97,14 @@ __kmp_for_static_init(
register kmp_info_t *th = __kmp_threads[ gtid ]; register kmp_info_t *th = __kmp_threads[ gtid ];
#if OMPT_SUPPORT && OMPT_TRACE #if OMPT_SUPPORT && OMPT_TRACE
ompt_team_info_t *team_info = __ompt_get_teaminfo(0, NULL); ompt_team_info_t *team_info = NULL;
ompt_task_info_t *task_info = __ompt_get_taskinfo(0); ompt_task_info_t *task_info = NULL;
if (ompt_enabled) {
// Only fully initialize variables needed by OMPT if OMPT is enabled.
team_info = __ompt_get_teaminfo(0, NULL);
task_info = __ompt_get_taskinfo(0);
}
#endif #endif
KMP_DEBUG_ASSERT( plastiter && plower && pupper && pstride ); KMP_DEBUG_ASSERT( plastiter && plower && pupper && pstride );

2
openmp/runtime/src/ompt-specific.c
View File

@ -50,6 +50,8 @@ __ompt_get_teaminfo(int depth, int *size)
if (thr) { if (thr) {
kmp_team *team = thr->th.th_team; kmp_team *team = thr->th.th_team;
if (team == NULL) return NULL;
ompt_lw_taskteam_t *lwt = LWT_FROM_TEAM(team); ompt_lw_taskteam_t *lwt = LWT_FROM_TEAM(team);
while(depth > 0) { while(depth > 0) {