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-rw-r--r--erts/preloaded/src/erlang.erl42
1 files changed, 42 insertions, 0 deletions
diff --git a/erts/preloaded/src/erlang.erl b/erts/preloaded/src/erlang.erl
index e042c0a072..2c1821df40 100644
--- a/erts/preloaded/src/erlang.erl
+++ b/erts/preloaded/src/erlang.erl
@@ -43,6 +43,9 @@
-export([memory/0, memory/1]).
-export([alloc_info/1, alloc_sizes/1]).
+-export([gather_sched_wall_time_result/1,
+ await_sched_wall_time_modifications/2]).
+
-deprecated([hash/2]).
%% Get rid of autoimports of spawn to avoid clashes with ourselves.
@@ -1863,6 +1866,11 @@ spawn_opt(_Tuple) ->
(runtime) -> {Total_Run_Time, Time_Since_Last_Call} when
Total_Run_Time :: non_neg_integer(),
Time_Since_Last_Call :: non_neg_integer();
+ (scheduler_wall_time) -> [{Scheduler_Id, Scheduler_Worked_Time, Scheduler_Total_Time}] |
+ undefined when
+ Scheduler_Id :: pos_integer(),
+ Scheduler_Worked_Time :: non_neg_integer(),
+ Scheduler_Total_Time :: non_neg_integer();
(wall_clock) -> {Total_Wallclock_Time,
Wallclock_Time_Since_Last_Call} when
Total_Wallclock_Time :: non_neg_integer(),
@@ -1908,6 +1916,9 @@ subtract(_,_) ->
(scheduler_bind_type, How) -> OldBindType when
How :: scheduler_bind_type() | default_bind,
OldBindType :: scheduler_bind_type();
+ (scheduler_wall_time, Boolean) -> OldBoolean when
+ Boolean :: boolean(),
+ OldBoolean :: boolean();
(schedulers_online, SchedulersOnline) ->
OldSchedulersOnline when
SchedulersOnline :: pos_integer(),
@@ -3246,3 +3257,34 @@ receive_allocator(Ref, N, Acc) ->
{Ref, _, InfoList} ->
receive_allocator(Ref, N-1, insert_info(InfoList, Acc))
end.
+
+-spec erlang:await_sched_wall_time_modifications(Ref, Result) -> boolean() when
+ Ref :: reference(),
+ Result :: boolean().
+
+await_sched_wall_time_modifications(Ref, Result) ->
+ sched_wall_time(Ref, erlang:system_info(schedulers)),
+ Result.
+
+-spec erlang:gather_sched_wall_time_result(Ref) -> [{pos_integer(),
+ non_neg_integer(),
+ non_neg_integer()}] when
+ Ref :: reference().
+
+gather_sched_wall_time_result(Ref) when erlang:is_reference(Ref) ->
+ sched_wall_time(Ref, erlang:system_info(schedulers), []).
+
+sched_wall_time(_Ref, 0) ->
+ ok;
+sched_wall_time(Ref, N) ->
+ receive Ref -> sched_wall_time(Ref, N-1) end.
+
+sched_wall_time(_Ref, 0, Acc) ->
+ Acc;
+sched_wall_time(Ref, N, undefined) ->
+ receive {Ref, _} -> sched_wall_time(Ref, N-1, undefined) end;
+sched_wall_time(Ref, N, Acc) ->
+ receive
+ {Ref, undefined} -> sched_wall_time(Ref, N-1, undefined);
+ {Ref, SWT} -> sched_wall_time(Ref, N-1, [SWT|Acc])
+ end.