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-rw-r--r--erts/emulator/test/statistics_SUITE.erl131
1 files changed, 118 insertions, 13 deletions
diff --git a/erts/emulator/test/statistics_SUITE.erl b/erts/emulator/test/statistics_SUITE.erl
index a1f12ba93c..f51244485b 100644
--- a/erts/emulator/test/statistics_SUITE.erl
+++ b/erts/emulator/test/statistics_SUITE.erl
@@ -28,6 +28,8 @@
runtime_update/1, runtime_diff/1,
run_queue_one/1,
scheduler_wall_time/1,
+ scheduler_wall_time_all/1,
+ msb_scheduler_wall_time/1,
reductions/1, reductions_big/1, garbage_collection/1, io/1,
badarg/1, run_queues_lengths_active_tasks/1, msacc/1]).
@@ -43,7 +45,9 @@ suite() ->
all() ->
[{group, wall_clock}, {group, runtime}, reductions,
- reductions_big, {group, run_queue}, scheduler_wall_time,
+ reductions_big, {group, run_queue},
+ scheduler_wall_time, scheduler_wall_time_all,
+ msb_scheduler_wall_time,
garbage_collection, io, badarg,
run_queues_lengths_active_tasks,
msacc].
@@ -271,35 +275,64 @@ hog_iter(0, Mon) ->
%% Tests that statistics(scheduler_wall_time) works as intended
scheduler_wall_time(Config) when is_list(Config) ->
+ scheduler_wall_time_test(scheduler_wall_time).
+
+%% Tests that statistics(scheduler_wall_time_all) works as intended
+scheduler_wall_time_all(Config) when is_list(Config) ->
+ scheduler_wall_time_test(scheduler_wall_time_all).
+
+scheduler_wall_time_test(Type) ->
%% Should return undefined if system_flag is not turned on yet
- undefined = statistics(scheduler_wall_time),
+ undefined = statistics(Type),
%% Turn on statistics
false = erlang:system_flag(scheduler_wall_time, true),
try
Schedulers = erlang:system_info(schedulers_online),
+ DirtyCPUSchedulers = erlang:system_info(dirty_cpu_schedulers_online),
+ DirtyIOSchedulers = erlang:system_info(dirty_io_schedulers),
+ TotLoadSchedulers = case Type of
+ scheduler_wall_time_all ->
+ Schedulers + DirtyCPUSchedulers + DirtyIOSchedulers;
+ scheduler_wall_time ->
+ Schedulers + DirtyCPUSchedulers
+ end,
+
%% Let testserver and everyone else finish their work
timer:sleep(1500),
%% Empty load
- EmptyLoad = get_load(),
+ EmptyLoad = get_load(Type),
{false, _} = {lists:any(fun(Load) -> Load > 50 end, EmptyLoad),EmptyLoad},
MeMySelfAndI = self(),
StartHog = fun() ->
- Pid = spawn(?MODULE, hog, [self()]),
+ Pid = spawn_link(?MODULE, hog, [self()]),
receive hog_started -> MeMySelfAndI ! go end,
Pid
end,
+ StartDirtyHog = fun(Func) ->
+ F = fun () ->
+ erts_debug:Func(alive_waitexiting,
+ MeMySelfAndI)
+ end,
+ Pid = spawn_link(F),
+ receive {alive, Pid} -> ok end,
+ Pid
+ end,
P1 = StartHog(),
%% Max on one, the other schedulers empty (hopefully)
%% Be generous the process can jump between schedulers
%% which is ok and we don't want the test to fail for wrong reasons
- _L1 = [S1Load|EmptyScheds1] = get_load(),
+ _L1 = [S1Load|EmptyScheds1] = get_load(Type),
{true,_} = {S1Load > 50,S1Load},
{false,_} = {lists:any(fun(Load) -> Load > 50 end, EmptyScheds1),EmptyScheds1},
{true,_} = {lists:sum(EmptyScheds1) < 60,EmptyScheds1},
%% 50% load
HalfHogs = [StartHog() || _ <- lists:seq(1, (Schedulers-1) div 2)],
- HalfLoad = lists:sum(get_load()) div Schedulers,
+ HalfDirtyCPUHogs = [StartDirtyHog(dirty_cpu)
+ || _ <- lists:seq(1, DirtyCPUSchedulers div 2)],
+ HalfDirtyIOHogs = [StartDirtyHog(dirty_io)
+ || _ <- lists:seq(1, DirtyIOSchedulers div 2)],
+ HalfLoad = lists:sum(get_load(Type)) div TotLoadSchedulers,
if Schedulers < 2, HalfLoad > 80 -> ok; %% Ok only one scheduler online and one hog
%% We want roughly 50% load
HalfLoad > 40, HalfLoad < 60 -> ok;
@@ -308,23 +341,30 @@ scheduler_wall_time(Config) when is_list(Config) ->
%% 100% load
LastHogs = [StartHog() || _ <- lists:seq(1, Schedulers div 2)],
- FullScheds = get_load(),
+ LastDirtyCPUHogs = [StartDirtyHog(dirty_cpu)
+ || _ <- lists:seq(1, DirtyCPUSchedulers div 2)],
+ LastDirtyIOHogs = [StartDirtyHog(dirty_io)
+ || _ <- lists:seq(1, DirtyIOSchedulers div 2)],
+ FullScheds = get_load(Type),
{false,_} = {lists:any(fun(Load) -> Load < 80 end, FullScheds),FullScheds},
- FullLoad = lists:sum(FullScheds) div Schedulers,
+ FullLoad = lists:sum(FullScheds) div TotLoadSchedulers,
if FullLoad > 90 -> ok;
true -> exit({fullload, FullLoad})
end,
KillHog = fun (HP) ->
HPM = erlang:monitor(process, HP),
+ unlink(HP),
exit(HP, kill),
receive
{'DOWN', HPM, process, HP, killed} ->
ok
end
end,
- [KillHog(Pid) || Pid <- [P1|HalfHogs++LastHogs]],
- AfterLoad = get_load(),
+ [KillHog(Pid) || Pid <- [P1|HalfHogs++HalfDirtyCPUHogs++HalfDirtyIOHogs
+ ++LastHogs++LastDirtyCPUHogs++LastDirtyIOHogs]],
+ receive after 2000 -> ok end, %% Give dirty schedulers time to complete...
+ AfterLoad = get_load(Type),
io:format("AfterLoad=~p~n", [AfterLoad]),
{false,_} = {lists:any(fun(Load) -> Load > 25 end, AfterLoad),AfterLoad},
true = erlang:system_flag(scheduler_wall_time, false)
@@ -332,16 +372,81 @@ scheduler_wall_time(Config) when is_list(Config) ->
erlang:system_flag(scheduler_wall_time, false)
end.
-get_load() ->
- Start = erlang:statistics(scheduler_wall_time),
+get_load(Type) ->
+ Start = erlang:statistics(Type),
timer:sleep(1500),
- End = erlang:statistics(scheduler_wall_time),
+ End = erlang:statistics(Type),
lists:reverse(lists:sort(load_percentage(lists:sort(Start),lists:sort(End)))).
load_percentage([{Id, WN, TN}|Ss], [{Id, WP, TP}|Ps]) ->
[100*(WN-WP) div (TN-TP)|load_percentage(Ss, Ps)];
load_percentage([], []) -> [].
+count(0) ->
+ ok;
+count(N) ->
+ count(N-1).
+
+msb_swt_hog(true) ->
+ count(1000000),
+ erts_debug:dirty_cpu(wait, 10),
+ erts_debug:dirty_io(wait, 10),
+ msb_swt_hog(true);
+msb_swt_hog(false) ->
+ count(1000000),
+ msb_swt_hog(false).
+
+msb_scheduler_wall_time(Config) ->
+ erlang:system_flag(scheduler_wall_time, true),
+ Dirty = erlang:system_info(dirty_cpu_schedulers) /= 0,
+ Hogs = lists:map(fun (_) ->
+ spawn_opt(fun () ->
+ msb_swt_hog(Dirty)
+ end, [{priority,low}, link, monitor])
+ end, lists:seq(1,10)),
+ erlang:system_flag(multi_scheduling, block),
+ try
+ SWT1 = lists:sort(statistics(scheduler_wall_time_all)),
+ %% io:format("SWT1 = ~p~n", [SWT1]),
+ receive after 4000 -> ok end,
+ SWT2 = lists:sort(statistics(scheduler_wall_time_all)),
+ %% io:format("SWT2 = ~p~n", [SWT2]),
+ SWT = lists:zip(SWT1, SWT2),
+ io:format("SU = ~p~n", [lists:map(fun({{I, A0, T0}, {I, A1, T1}}) ->
+ {I, (A1 - A0)/(T1 - T0)} end,
+ SWT)]),
+ {A, T} = lists:foldl(fun({{_, A0, T0}, {_, A1, T1}}, {Ai,Ti}) ->
+ {Ai + (A1 - A0), Ti + (T1 - T0)}
+ end,
+ {0, 0},
+ SWT),
+ TSU = A/T,
+ WSU = ((TSU * (erlang:system_info(schedulers)
+ + erlang:system_info(dirty_cpu_schedulers)
+ + erlang:system_info(dirty_io_schedulers)))
+ / 1),
+ %% Weighted scheduler utilization should be
+ %% very close to 1.0, i.e., we execute the
+ %% same time as one thread executing all
+ %% the time...
+ io:format("WSU = ~p~n", [WSU]),
+ true = 0.9 < WSU andalso WSU < 1.1,
+ ok
+ after
+ erlang:system_flag(multi_scheduling, unblock),
+ erlang:system_flag(scheduler_wall_time, false),
+ lists:foreach(fun ({HP, _HM}) ->
+ unlink(HP),
+ exit(HP, kill)
+ end, Hogs),
+ lists:foreach(fun ({HP, HM}) ->
+ receive
+ {'DOWN', HM, process, HP, _} ->
+ ok
+ end
+ end, Hogs),
+ ok
+ end.
%% Tests that statistics(garbage_collection) is callable.
%% It is not clear how to test anything more.
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 16:12:50 +0000