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[OMPT] Provide the right thread_num for ancestor levels
The current implementation always provides the thread-num for the current parallel region. This patch fixes the behavior for ancestor levels >0. Differential Revision: https://reviews.llvm.org/D46533 llvm-svn: 336085
This commit is contained in:
Joachim Protze
parent
3af2c992dc
commit
4a73ae167e
@ -341,18 +341,23 @@ int __ompt_get_task_info_internal(int ancestor_level, int *type,
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ompt_task_info_t *info = NULL;
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ompt_team_info_t *team_info = NULL;
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kmp_info_t *thr = ompt_get_thread();
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int level = ancestor_level;
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if (thr) {
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kmp_taskdata_t *taskdata = thr->th.th_current_task;
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if (taskdata == NULL)
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return 0;
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kmp_team *team = thr->th.th_team;
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kmp_team *team = thr->th.th_team, *prev_team = NULL;
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if (team == NULL)
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return 0;
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ompt_lw_taskteam_t *lwt = NULL,
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*next_lwt = LWT_FROM_TEAM(taskdata->td_team);
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*next_lwt = LWT_FROM_TEAM(taskdata->td_team),
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*prev_lwt = NULL;
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while (ancestor_level > 0) {
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// needed for thread_num
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prev_team = team;
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prev_lwt = lwt;
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// next lightweight team (if any)
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if (lwt)
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lwt = lwt->parent;
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@ -410,7 +415,13 @@ int __ompt_get_task_info_internal(int ancestor_level, int *type,
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*parallel_data = team_info ? &(team_info->parallel_data) : NULL;
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}
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if (thread_num) {
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*thread_num = __kmp_get_gtid();
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if (level == 0)
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*thread_num = __kmp_get_tid();
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else if (prev_lwt)
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*thread_num = 0;
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else
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*thread_num = prev_team->t.t_master_tid;
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// *thread_num = team->t.t_master_tid;
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}
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return info ? 2 : 0;
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}
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357
openmp/runtime/test/ompt/parallel/nested_thread_num.c
Normal file
357
openmp/runtime/test/ompt/parallel/nested_thread_num.c
Normal file
@ -0,0 +1,357 @@
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// RUN: %libomp-compile-and-run | FileCheck %s
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// RUN: %libomp-compile-and-run | %sort-threads | FileCheck --check-prefix=THREADS %s
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// REQUIRES: ompt
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// UNSUPPORTE: gcc-4, gcc-5, gcc-6, gcc-7
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#define TEST_NEED_PRINT_FRAME_FROM_OUTLINED_FN
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#include "callback.h"
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#include <omp.h>
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#include <unistd.h>
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int main() {
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int condition = 0;
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omp_set_nested(1);
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print_frame(0);
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#pragma omp parallel num_threads(2)
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{
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print_frame_from_outlined_fn(1);
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print_ids(0);
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print_ids(1);
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print_frame(0);
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// get all implicit task events before starting nested:
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#pragma omp barrier
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#pragma omp parallel num_threads(2)
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{
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print_frame_from_outlined_fn(1);
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print_ids(0);
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print_ids(1);
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print_ids(2);
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print_frame(0);
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OMPT_SIGNAL(condition);
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OMPT_WAIT(condition, 4);
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#pragma omp barrier
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print_fuzzy_address(1);
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print_ids(0);
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}
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print_fuzzy_address(2);
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print_ids(0);
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}
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print_fuzzy_address(3);
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return 0;
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}
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// Check if libomp supports the callbacks for this test.
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// CHECK-NOT: {{^}}0: Could not register callback
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// CHECK: 0: NULL_POINTER=[[NULL:.*$]]
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// make sure initial data pointers are null
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// CHECK-NOT: 0: parallel_data initially not null
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// CHECK-NOT: 0: task_data initially not null
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// CHECK-NOT: 0: thread_data initially not null
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// CHECK: {{^}}[[MASTER_ID:[0-9]+]]: ompt_event_parallel_begin:
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// CHECK-SAME: parent_task_id=[[PARENT_TASK_ID:[0-9]+]],
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// CHECK-SAME: parent_task_frame.exit=[[NULL]],
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// CHECK-SAME: parent_task_frame.reenter={{0x[0-f]+}},
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// CHECK-SAME: parallel_id=[[PARALLEL_ID:[0-9]+]],
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// CHECK-SAME: requested_team_size=2,
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// CHECK-SAME: codeptr_ra=[[RETURN_ADDRESS:0x[0-f]+]]{{[0-f][0-f]}},
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// CHECK-SAME: invoker=[[PARALLEL_INVOKER:[0-9]+]]
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// CHECK-DAG: {{^}}[[MASTER_ID]]: ompt_event_implicit_task_begin:
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// CHECK-DAG: {{^}}[[MASTER_ID]]: ompt_event_implicit_task_end:
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// Note that we cannot ensure that the worker threads have already called
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// barrier_end and implicit_task_end before parallel_end!
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// CHECK-DAG: {{^}}[[THREAD_ID:[0-9]+]]: ompt_event_implicit_task_begin:
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// CHECK-DAG: {{^}}[[THREAD_ID]]: ompt_event_barrier_begin:
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// CHECK: ompt_event_parallel_end: parallel_id=[[PARALLEL_ID]],
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// CHECK-SAME: task_id=[[PARENT_TASK_ID]], invoker=[[PARALLEL_INVOKER]]
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// CHECK: {{^}}[[MASTER_ID]]: fuzzy_address={{.*}}[[RETURN_ADDRESS]]
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// THREADS: {{^}}0: NULL_POINTER=[[NULL:.*$]]
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// THREADS: __builtin_frame_address(0)=[[MAIN_REENTER:0x[0-f]+]]
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// THREADS: {{^}}[[MASTER_ID:[0-9]+]]: ompt_event_parallel_begin:
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// THREADS-SAME: parent_task_id=[[PARENT_TASK_ID:[0-9]+]],
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// THREADS-SAME: parent_task_frame.exit=[[NULL]],
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// THREADS-SAME: parent_task_frame.reenter=[[MAIN_REENTER]],
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// THREADS-SAME: parallel_id=[[PARALLEL_ID:[0-9]+]], requested_team_size=2,
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// THREADS-SAME: codeptr_ra=[[RETURN_ADDRESS:0x[0-f]+]]{{[0-f][0-f]}},
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// THREADS-SAME: invoker=[[PARALLEL_INVOKER:[0-9]+]]
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// nested parallel masters
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// THREADS: {{^}}[[MASTER_ID]]: ompt_event_implicit_task_begin:
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// THREADS-SAME: parallel_id=[[PARALLEL_ID]],
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// THREADS-SAME: task_id=[[IMPLICIT_TASK_ID:[0-9]+]],
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// THREADS-SAME: team_size=2, thread_num=0
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// THREADS: __builtin_frame_address({{.}})=[[EXIT:0x[0-f]+]]
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// THREADS: {{^}}[[MASTER_ID]]: task level 0: parallel_id=[[PARALLEL_ID]],
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// THREADS-SAME: task_id=[[IMPLICIT_TASK_ID]], exit_frame=[[EXIT]],
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// THREADS-SAME: reenter_frame=[[NULL]],
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// THREADS-SAME: thread_num=0
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// THREADS: {{^}}[[MASTER_ID]]: task level 1:
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// THREADS-SAME: parallel_id=[[IMPLICIT_PARALLEL_ID:[0-9]+]],
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// THREADS-SAME: task_id=[[PARENT_TASK_ID]], exit_frame=[[NULL]],
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// THREADS-SAME: reenter_frame=[[MAIN_REENTER]]
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// THREADS: __builtin_frame_address(0)=[[REENTER:0x[0-f]+]]
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// THREADS: {{^}}[[MASTER_ID]]: ompt_event_parallel_begin:
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// THREADS-SAME: parent_task_id=[[IMPLICIT_TASK_ID]],
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// THREADS-SAME: parent_task_frame.exit=[[EXIT]],
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// THREADS-SAME: parent_task_frame.reenter=[[REENTER]],
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// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID:[0-9]+]],
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// THREADS-SAME: requested_team_size=2,
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// THREADS-SAME: codeptr_ra=[[NESTED_RETURN_ADDRESS:0x[0-f]+]]{{[0-f][0-f]}},
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// THREADS-SAME: invoker=[[PARALLEL_INVOKER]]
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// THREADS: {{^}}[[MASTER_ID]]: ompt_event_implicit_task_begin:
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// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID]],
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// THREADS-SAME: task_id=[[NESTED_IMPLICIT_TASK_ID:[0-9]+]], team_size=2,
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// THREADS-SAME: thread_num=0
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// THREADS: __builtin_frame_address({{.}})=[[NESTED_EXIT:0x[0-f]+]]
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// THREADS: {{^}}[[MASTER_ID]]: task level 0:
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// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID]],
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// THREADS-SAME: task_id=[[NESTED_IMPLICIT_TASK_ID]],
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// THREADS-SAME: exit_frame=[[NESTED_EXIT]], reenter_frame=[[NULL]],
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// THREADS-SAME: thread_num=0
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// THREADS: {{^}}[[MASTER_ID]]: task level 1: parallel_id=[[PARALLEL_ID]],
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// THREADS-SAME: task_id=[[IMPLICIT_TASK_ID]], exit_frame=[[EXIT]],
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// THREADS-SAME: reenter_frame=[[REENTER]]
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// THREADS: {{^}}[[MASTER_ID]]: task level 2:
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// THREADS-SAME: parallel_id=[[IMPLICIT_PARALLEL_ID]],
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// THREADS-SAME: task_id=[[PARENT_TASK_ID]], exit_frame=[[NULL]],
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// THREADS-SAME: reenter_frame=[[MAIN_REENTER]]
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// THREADS: __builtin_frame_address(0)=[[NESTED_REENTER:0x[0-f]+]]
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// THREADS-NOT: {{^}}[[MASTER_ID]]: ompt_event_implicit_task_end
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// explicit barrier
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// THREADS: {{^}}[[MASTER_ID]]: ompt_event_barrier_begin:
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// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID]],
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// THREADS-SAME: task_id=[[NESTED_IMPLICIT_TASK_ID]],
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// THREADS-SAME: codeptr_ra=[[BARRIER_RETURN_ADDRESS:0x[0-f]+]]{{[0-f][0-f]}}
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// THREADS: {{^}}[[MASTER_ID]]: task level 0:
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// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID]],
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// THREADS-SAME: task_id=[[NESTED_IMPLICIT_TASK_ID]],
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// THREADS-SAME: exit_frame=[[NESTED_EXIT]], reenter_frame=[[NESTED_REENTER]]
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// THREADS: {{^}}[[MASTER_ID]]: ompt_event_barrier_end:
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// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID]],
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// THREADS-SAME: task_id=[[NESTED_IMPLICIT_TASK_ID]]
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// THREADS: {{^}}[[MASTER_ID]]: fuzzy_address={{.*}}[[BARRIER_RETURN_ADDRESS]]
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// THREADS: {{^}}[[MASTER_ID]]: task level 0:
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// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID]],
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// THREADS-SAME: task_id=[[NESTED_IMPLICIT_TASK_ID]],
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// THREADS-SAME: exit_frame=[[NESTED_EXIT]], reenter_frame=[[NULL]]
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// implicit barrier
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// THREADS: {{^}}[[MASTER_ID]]: ompt_event_barrier_begin:
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// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID]],
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// THREADS-SAME: task_id=[[NESTED_IMPLICIT_TASK_ID]],
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// THREADS-SAME: codeptr_ra=[[NESTED_RETURN_ADDRESS]]{{[0-f][0-f]}}
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// THREADS: {{^}}[[MASTER_ID]]: task level 0:
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// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID]],
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// THREADS-SAME: task_id=[[NESTED_IMPLICIT_TASK_ID]],
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// THREADS-SAME: exit_frame=[[NULL]], reenter_frame=[[NULL]]
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// THREADS: {{^}}[[MASTER_ID]]: ompt_event_barrier_end:
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// THREADS-SAME: parallel_id={{[0-9]+}}, task_id=[[NESTED_IMPLICIT_TASK_ID]],
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// THREADS-SAME: codeptr_ra=[[NESTED_RETURN_ADDRESS]]{{[0-f][0-f]}}
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// THREADS: {{^}}[[MASTER_ID]]: ompt_event_implicit_task_end:
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// THREADS-SAME: parallel_id={{[0-9]+}}, task_id=[[NESTED_IMPLICIT_TASK_ID]]
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// THREADS: {{^}}[[MASTER_ID]]: ompt_event_parallel_end:
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// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID]],
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// THREADS-SAME: task_id=[[IMPLICIT_TASK_ID]],
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// THREADS-SAME: invoker=[[PARALLEL_INVOKER]],
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// THREADS-SAME: codeptr_ra=[[NESTED_RETURN_ADDRESS]]{{[0-f][0-f]}}
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// THREADS: {{^}}[[MASTER_ID]]: fuzzy_address={{.*}}[[NESTED_RETURN_ADDRESS]]
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// THREADS-NOT: {{^}}[[MASTER_ID]]: ompt_event_implicit_task_end
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// THREADS: {{^}}[[MASTER_ID]]: task level 0: parallel_id=[[PARALLEL_ID]],
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// THREADS-SAME: task_id=[[IMPLICIT_TASK_ID]], exit_frame=[[EXIT]],
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// THREADS-SAME: reenter_frame=[[NULL]]
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// implicit barrier
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// THREADS: {{^}}[[MASTER_ID]]: ompt_event_barrier_begin:
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// THREADS-SAME: parallel_id=[[PARALLEL_ID]], task_id=[[IMPLICIT_TASK_ID]],
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// THREADS-SAME: codeptr_ra=[[RETURN_ADDRESS]]{{[0-f][0-f]}}
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// THREADS: {{^}}[[MASTER_ID]]: task level 0: parallel_id=[[PARALLEL_ID]],
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// THREADS-SAME: task_id=[[IMPLICIT_TASK_ID]], exit_frame=[[NULL]],
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// THREADS-SAME: reenter_frame=[[NULL]]
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// THREADS: {{^}}[[MASTER_ID]]: ompt_event_barrier_end:
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// THREADS-SAME: parallel_id={{[0-9]+}}, task_id=[[IMPLICIT_TASK_ID]],
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// THREADS-SAME: codeptr_ra=[[RETURN_ADDRESS]]{{[0-f][0-f]}}
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// THREADS: {{^}}[[MASTER_ID]]: ompt_event_implicit_task_end:
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// THREADS-SAME: parallel_id={{[0-9]+}}, task_id=[[IMPLICIT_TASK_ID]]
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// THREADS: {{^}}[[MASTER_ID]]: ompt_event_parallel_end:
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// THREADS-SAME: parallel_id=[[PARALLEL_ID]], task_id=[[PARENT_TASK_ID]],
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// THREADS-SAME: invoker=[[PARALLEL_INVOKER]],
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// THREADS-SAME: codeptr_ra=[[RETURN_ADDRESS]]{{[0-f][0-f]}}
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// THREADS: {{^}}[[MASTER_ID]]: fuzzy_address={{.*}}[[RETURN_ADDRESS]]
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// Worker of first nesting level
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// THREADS: {{^}}[[THREAD_ID:[0-9]+]]: ompt_event_implicit_task_begin:
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// THREADS-SAME: parallel_id=[[PARALLEL_ID]],
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// THREADS-SAME: task_id=[[IMPLICIT_TASK_ID:[0-9]+]], team_size=2,
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// THREADS-SAME: thread_num=[[OUTER_THREADNUM:[0-9]+]]
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// THREADS: {{^}}[[THREAD_ID]]: task level 0: parallel_id=[[PARALLEL_ID]],
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// THREADS-SAME: task_id=[[IMPLICIT_TASK_ID]],
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// THREADS-SAME: thread_num=[[OUTER_THREADNUM]]
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// THREADS: {{^}}[[THREAD_ID]]: task level 1:
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// THREADS-SAME: parallel_id=[[IMPLICIT_PARALLEL_ID]],
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// THREADS-SAME: task_id=[[PARENT_TASK_ID]]
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// THREADS: {{^}}[[THREAD_ID]]: ompt_event_parallel_begin:
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// THREADS-SAME: parent_task_id=[[IMPLICIT_TASK_ID]],
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// THREADS-SAME: parent_task_frame.exit={{0x[0-f]+}},
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// THREADS-SAME: parent_task_frame.reenter={{0x[0-f]+}},
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// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID:[0-9]+]], requested_team_size=2,
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// THREADS-SAME: codeptr_ra=[[NESTED_RETURN_ADDRESS]]{{[0-f][0-f]}},
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// THREADS-SAME: invoker=[[PARALLEL_INVOKER]]
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// THREADS: {{^}}[[THREAD_ID]]: ompt_event_implicit_task_begin:
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// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID]],
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// THREADS-SAME: task_id=[[NESTED_IMPLICIT_TASK_ID:[0-9]+]], team_size=2,
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// THREADS-SAME: thread_num=[[INNER_THREADNUM:[0-9]+]]
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// THREADS: {{^}}[[THREAD_ID]]: task level 0:
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// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID]],
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// THREADS-SAME: task_id=[[NESTED_IMPLICIT_TASK_ID]],
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// THREADS-SAME: thread_num=[[INNER_THREADNUM]]
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// THREADS: {{^}}[[THREAD_ID]]: task level 1: parallel_id=[[PARALLEL_ID]],
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// THREADS-SAME: task_id=[[IMPLICIT_TASK_ID]],
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// THREADS-SAME: thread_num=[[OUTER_THREADNUM]]
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// THREADS: {{^}}[[THREAD_ID]]: task level 2:
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// THREADS-SAME: parallel_id=[[IMPLICIT_PARALLEL_ID]],
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// THREADS-SAME: task_id=[[PARENT_TASK_ID]]
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// THREADS-NOT: {{^}}[[THREAD_ID]]: ompt_event_implicit_task_end
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// THREADS: {{^}}[[THREAD_ID]]: ompt_event_barrier_begin:
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// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID]],
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// THREADS-SAME: task_id=[[NESTED_IMPLICIT_TASK_ID]]
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// THREADS: {{^}}[[THREAD_ID]]: ompt_event_barrier_end:
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// THREADS-SAME: parallel_id={{[0-9]+}}, task_id=[[NESTED_IMPLICIT_TASK_ID]]
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// THREADS: {{^}}[[THREAD_ID]]: ompt_event_implicit_task_end:
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// THREADS-SAME: parallel_id={{[0-9]+}}, task_id=[[NESTED_IMPLICIT_TASK_ID]]
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// THREADS: {{^}}[[THREAD_ID]]: ompt_event_parallel_end:
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// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID]],
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// THREADS-SAME: task_id=[[IMPLICIT_TASK_ID]], invoker=[[PARALLEL_INVOKER]]
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// THREADS-NOT: {{^}}[[THREAD_ID]]: ompt_event_implicit_task_end
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// THREADS: {{^}}[[THREAD_ID]]: ompt_event_barrier_begin:
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||||
// THREADS-SAME: parallel_id=[[PARALLEL_ID]], task_id=[[IMPLICIT_TASK_ID]]
|
||||
|
||||
// THREADS: {{^}}[[THREAD_ID]]: ompt_event_barrier_end:
|
||||
// THREADS-SAME: parallel_id={{[0-9]+}}, task_id=[[IMPLICIT_TASK_ID]]
|
||||
|
||||
// THREADS: {{^}}[[THREAD_ID]]: ompt_event_implicit_task_end:
|
||||
// THREADS-SAME: parallel_id={{[0-9]+}}, task_id=[[IMPLICIT_TASK_ID]]
|
||||
|
||||
// nested parallel worker threads
|
||||
|
||||
// THREADS: {{^}}[[THREAD_ID:[0-9]+]]: ompt_event_implicit_task_begin:
|
||||
// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID:[0-9]+]],
|
||||
// THREADS-SAME: task_id=[[IMPLICIT_TASK_ID:[0-9]+]]
|
||||
// THREADS-SAME: thread_num=[[THREADNUM:[0-9]+]]
|
||||
|
||||
// THREADS: {{^}}[[THREAD_ID]]: task level 0:
|
||||
// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID]],
|
||||
// THREADS-SAME: task_id=[[IMPLICIT_TASK_ID]]
|
||||
// THREADS-SAME: thread_num=[[THREADNUM]]
|
||||
|
||||
// can't reliably tell which parallel region is the parent...
|
||||
|
||||
// THREADS: {{^}}[[THREAD_ID]]: task level 1: parallel_id={{[0-9]+}},
|
||||
// THREADS-SAME: task_id={{[0-9]+}}
|
||||
// THREADS-SAME: thread_num={{[01]}}
|
||||
|
||||
// THREADS: {{^}}[[THREAD_ID]]: task level 2:
|
||||
// THREADS-SAME: parallel_id=[[IMPLICIT_PARALLEL_ID]],
|
||||
// THREADS-SAME: task_id=[[PARENT_TASK_ID]]
|
||||
// THREADS-SAME: thread_num=0
|
||||
|
||||
// THREADS-NOT: {{^}}[[THREAD_ID]]: ompt_event_implicit_task_end
|
||||
|
||||
// THREADS: {{^}}[[THREAD_ID]]: ompt_event_barrier_begin:
|
||||
// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID]],
|
||||
// THREADS-SAME: task_id=[[IMPLICIT_TASK_ID]]
|
||||
|
||||
// THREADS: {{^}}[[THREAD_ID]]: ompt_event_barrier_end:
|
||||
// THREADS-SAME: parallel_id={{[0-9]+}}, task_id=[[IMPLICIT_TASK_ID]]
|
||||
|
||||
// THREADS: {{^}}[[THREAD_ID]]: ompt_event_implicit_task_end:
|
||||
// THREADS-SAME: parallel_id={{[0-9]+}}, task_id=[[IMPLICIT_TASK_ID]]
|
||||
|
||||
// other nested parallel worker threads
|
||||
|
||||
// THREADS: {{^}}[[THREAD_ID:[0-9]+]]: ompt_event_implicit_task_begin:
|
||||
// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID:[0-9]+]],
|
||||
// THREADS-SAME: task_id=[[IMPLICIT_TASK_ID:[0-9]+]]
|
||||
// THREADS-SAME: thread_num=[[THREADNUM:[0-9]+]]
|
||||
|
||||
// THREADS: {{^}}[[THREAD_ID]]: task level 0:
|
||||
// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID]],
|
||||
// THREADS-SAME: task_id=[[IMPLICIT_TASK_ID]]
|
||||
// THREADS-SAME: thread_num=[[THREADNUM]]
|
||||
|
||||
// can't reliably tell which parallel region is the parent...
|
||||
|
||||
// THREADS: {{^}}[[THREAD_ID]]: task level 1: parallel_id={{[0-9]+}},
|
||||
// THREADS-SAME: task_id={{[0-9]+}}
|
||||
// THREADS-SAME: thread_num={{[01]}}
|
||||
|
||||
// THREADS: {{^}}[[THREAD_ID]]: task level 2:
|
||||
// THREADS-SAME: parallel_id=[[IMPLICIT_PARALLEL_ID]],
|
||||
// THREADS-SAME: task_id=[[PARENT_TASK_ID]]
|
||||
// THREADS-SAME: thread_num=0
|
||||
|
||||
// THREADS-NOT: {{^}}[[THREAD_ID]]: ompt_event_implicit_task_end
|
||||
|
||||
// THREADS: {{^}}[[THREAD_ID]]: ompt_event_barrier_begin:
|
||||
// THREADS-SAME: parallel_id=[[NESTED_PARALLEL_ID]],
|
||||
// THREADS-SAME: task_id=[[IMPLICIT_TASK_ID]]
|
||||
|
||||
// THREADS: {{^}}[[THREAD_ID]]: ompt_event_barrier_end:
|
||||
// THREADS-SAME: parallel_id={{[0-9]+}}, task_id=[[IMPLICIT_TASK_ID]]
|
||||
|
||||
// THREADS: {{^}}[[THREAD_ID]]: ompt_event_implicit_task_end:
|
||||
// THREADS-SAME: parallel_id={{[0-9]+}}, task_id=[[IMPLICIT_TASK_ID]]
|
||||
|
||||
Loading…
Reference in New Issue
Block a user