diff options
| author | Dan Gudmundsson <[email protected]> | 2014-02-13 13:30:29 +0100 |
|---|---|---|
| committer | Dan Gudmundsson <[email protected]> | 2014-02-13 13:30:29 +0100 |
| commit | 265998a7e412cd382315632964846569c370a5a2 (patch) | |
| tree | e1c5ad91b62170bf9345835e89d71905e0a5cc7e /lib/runtime_tools/src/observer_backend.erl | |
| parent | b28f32d3b793fa7dbaa97f015f84b402bcca2161 (diff) | |
| download | otp-265998a7e412cd382315632964846569c370a5a2.tar.gz otp-265998a7e412cd382315632964846569c370a5a2.tar.bz2 otp-265998a7e412cd382315632964846569c370a5a2.zip | |
runtime_tools: Do not turn off scheduler_wall_time
Until this is reference counted it may interfere with other applications.
The performance loss should (according to the implementor) be negligible with it
always on.
Diffstat (limited to 'lib/runtime_tools/src/observer_backend.erl')
| -rw-r--r-- | lib/runtime_tools/src/observer_backend.erl | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/lib/runtime_tools/src/observer_backend.erl b/lib/runtime_tools/src/observer_backend.erl index 68ef04f20c..fea0854042 100644 --- a/lib/runtime_tools/src/observer_backend.erl +++ b/lib/runtime_tools/src/observer_backend.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2002-2013. All Rights Reserved. +%% Copyright Ericsson AB 2002-2014. All Rights Reserved. %% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in @@ -227,7 +227,9 @@ fetch_stats(Parent, Time) -> fetch_stats_loop(Parent, Time) -> erlang:system_flag(scheduler_wall_time, true), receive - _Msg -> erlang:system_flag(scheduler_wall_time, false) + _Msg -> + %% erlang:system_flag(scheduler_wall_time, false) + ok after Time -> _M = Parent ! {stats, 1, erlang:statistics(scheduler_wall_time), @@ -244,17 +246,6 @@ etop_collect(Collector) -> %% utilization in etop). Next time the flag will be true and then %% there will be a measurement. SchedulerWallTime = erlang:statistics(scheduler_wall_time), - - %% Turn off the flag while collecting data per process etc. - case erlang:system_flag(scheduler_wall_time,false) of - false -> - %% First time and the flag was false - start a monitoring - %% process to set the flag back to false when etop is stopped. - spawn(fun() -> flag_holder_proc(Collector) end); - _ -> - ok - end, - ProcInfo = etop_collect(processes(), []), Collector ! {self(),#etop_info{now = now(), @@ -264,13 +255,22 @@ etop_collect(Collector) -> memi = etop_memi(), procinfo = ProcInfo }}, + + case SchedulerWallTime of + undefined -> + spawn(fun() -> flag_holder_proc(Collector) end); + _ -> + ok + end, + erlang:system_flag(scheduler_wall_time,true). flag_holder_proc(Collector) -> Ref = erlang:monitor(process,Collector), receive {'DOWN',Ref,_,_,_} -> - erlang:system_flag(scheduler_wall_time,false) + %% erlang:system_flag(scheduler_wall_time,false) + ok end. etop_memi() -> |