aboutsummaryrefslogtreecommitdiffstats
path: root/lib/stdlib/test/timer_simple_SUITE.erl
blob: 4b09b6ffff745c7137cd197c9eb80c85092b6c49 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
%%
%% %CopyrightBegin%
%% 
%% Copyright Ericsson AB 1997-2011. All Rights Reserved.
%% 
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%%     http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%% 
%% %CopyrightEnd%
%%
%%% Purpose : Test the timer module a simpler/faster test than timer_SUITE

-module(timer_simple_SUITE).

%% external
-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
	 init_per_group/2,end_per_group/2, 
	 init_per_testcase/2,
	 apply_after/1,
	 send_after1/1,
	 send_after2/1,
	 send_after3/1,
	 exit_after1/1,
	 exit_after2/1,
	 kill_after1/1,
	 kill_after2/1,
	 apply_interval/1,
	 send_interval1/1,
	 send_interval2/1,
	 send_interval3/1,
	 send_interval4/1,
	 cancel1/1,
	 cancel2/1,
	 tc/1,
	 unique_refs/1,
	 timer_perf/1]).

%% internal
-export([forever/0,
	 do_nrev/2,
	 send/2,
	 timer/4,
	 timer/5]).

-include_lib("common_test/include/ct.hrl").

-define(MAXREF, (1 bsl 18)).
-define(REFMARG, 30).

suite() ->
    [{ct_hooks,[ts_install_cth]},
     {timetrap,{minutes,10}}].

all() -> 
    [apply_after, send_after1, send_after2, send_after3,
     exit_after1, exit_after2, kill_after1, kill_after2,
     apply_interval, send_interval1, send_interval2,
     send_interval3, send_interval4, cancel1, cancel2, tc,
     unique_refs, timer_perf].

groups() -> 
    [].

init_per_suite(Config) ->
    Config.

end_per_suite(_Config) ->
    ok.

init_per_group(_GroupName, Config) ->
    Config.

end_per_group(_GroupName, Config) ->
    Config.


init_per_testcase(_, Config) when is_list(Config) ->
    timer:start(),
    Config.

%% Testing timer interface!!

%% Test of apply_after, with sending of message.
apply_after(Config) when is_list(Config) ->
    ?line timer:apply_after(500, ?MODULE, send, [self(), ok_apply]),
    ?line ok = get_mess(1000, ok_apply).

%% Test of send_after with time = 0.
send_after1(Config) when is_list(Config) ->
    ?line timer:send_after(0, ok_send1),
    ?line ok = get_mess(1000, ok_send1).

%% Test of send_after with time = 500.
send_after2(Config) when is_list(Config) ->
    ?line timer:send_after(500, self(), ok_send2),
    ?line ok = get_mess(2000, ok_send2).

%% Test of send_after with time = 500, with receiver a registered
%% process. [OTP-2735]
send_after3(Config) when is_list(Config) ->
    ?line Name = list_to_atom(pid_to_list(self())),
    ?line register(Name, self()),
    ?line timer:send_after(500, Name, ok_send3),
    ?line ok = get_mess(2000, ok_send3),
    ?line unregister(Name).

%% Test of exit_after with time = 1000.
exit_after1(Config) when is_list(Config) ->
    ?line process_flag(trap_exit, true),
    ?line Pid = spawn_link(?MODULE, forever, []),
    ?line timer:exit_after(1000, Pid, exit_test1),
    ?line ok = get_mess(5000, {'EXIT', Pid, exit_test1}).

%% Test of exit_after with time = 1000. The process to exit is the
%% name of a registered process.  [OTP-2735]
exit_after2(Config) when is_list(Config) ->
    ?line process_flag(trap_exit, true),
    ?line Pid = spawn_link(?MODULE, forever, []),
    ?line Name = list_to_atom(pid_to_list(Pid)),
    ?line register(Name, Pid),
    ?line timer:exit_after(1000, Name, exit_test2),
    ?line ok = get_mess(2000, {'EXIT', Pid, exit_test2}).

%% Test of kill_after with time = 1000.
kill_after1(Config) when is_list(Config) ->
    ?line process_flag(trap_exit, true),
    ?line Pid = spawn_link(?MODULE, forever, []),
    ?line timer:kill_after(1000, Pid),
    ?line ok = get_mess(2000, {'EXIT', Pid, killed}).

%% Test of kill_after with time = 1000. The process to exit is the
%% name of a registered process.  [OTP-2735]
kill_after2(Config) when is_list(Config) ->
    ?line process_flag(trap_exit, true),
    ?line Pid = spawn_link(?MODULE, forever, []),
    ?line Name = list_to_atom(pid_to_list(Pid)),
    ?line register(Name, Pid),
    ?line timer:kill_after(1000, Name),
    ?line ok = get_mess(2000, {'EXIT', Pid, killed}).

%% Test of apply_interval by sending messages. Receive
%% 3 messages, cancel the timer, and check that we do
%% not get any more messages.
apply_interval(Config) when is_list(Config) ->
    ?line {ok, Ref} = timer:apply_interval(1000, ?MODULE, send, 
				     [self(), apply_int]),
    ?line ok = get_mess(1500, apply_int, 3),
    ?line timer:cancel(Ref),
    ?line nor = get_mess(1000, apply_int).

%% Test of send_interval/2. Receive 5 messages, cancel the timer, and
%% check that we do not get any more messages.
send_interval1(Config) when is_list(Config) ->
    {ok, Ref} = timer:send_interval(1000, send_int),
    ?line ok = get_mess(1500, send_int, 5),
    timer:cancel(Ref),
    ?line nor = get_mess(1000, send_int). % We should receive only five

%% Test of send_interval/3. Receive 2 messages, cancel the timer, and
%% check that we do not get any more messages.
send_interval2(Config) when is_list(Config) ->
    {ok, Ref} = timer:send_interval(1000, self(), send_int2),
    ?line ok = get_mess(1500, send_int2, 2),
    timer:cancel(Ref),
    ?line nor = get_mess(1000, send_int2).  % We should receive only two

%% Test of send_interval/3. Receive 2 messages, cancel the timer, and
%% check that we do not get any more messages. The receiver is the
%% name of a registered process. [OTP-2735]
send_interval3(Config) when is_list(Config) ->
    ?line process_flag(trap_exit, true),
    ?line Name = list_to_atom(pid_to_list(self())),
    ?line register(Name, self()),
    ?line {ok, Ref} = timer:send_interval(1000, Name, send_int3),
    ?line ok = get_mess(1500, send_int3, 2),
    timer:cancel(Ref),
    ?line nor = get_mess(1000, send_int3),  % We should receive only two
    ?line unregister(Name).

%% Test that send interval stops sending msg when the receiving
%% process terminates.
send_interval4(Config) when is_list(Config) ->
    ?line timer:send_interval(500, one_time_only),
    receive 
	one_time_only -> ok
    end,
    ?line timer_server ! {'EXIT', self(), normal}, % Should remove the timer
    ?line timer:send_after(600, send_intv_ok),
    ?line send_intv_ok = receive 
			     Msg -> Msg
			 end.

%% Test that we can cancel a timer.
cancel1(Config) when is_list(Config) ->
    ?line {ok, Ref} = timer:send_after(1000, this_should_be_canceled),
    ?line timer:cancel(Ref),
    ?line nor = get_mess(2000, this_should_be_canceled). % We should rec 0 msgs

%% Test cancel/1 with bad argument.
cancel2(Config) when is_list(Config) ->
    ?line {error, badarg} = timer:cancel(no_reference). 

%% Test sleep/1 and tc/3.
tc(Config) when is_list(Config) ->
    %% This should test both sleep and tc/3
    ?line {Res1, ok} = timer:tc(timer, sleep, [500]),
    ?line ok = 	if
		    Res1 < 500*1000 -> {too_early, Res1}; % Too early
		    Res1 > 800*1000 -> {too_late, Res1};  % Too much time
		    true -> ok
		end,

    %% tc/2
    ?line {Res2, ok} = timer:tc(fun(T) -> timer:sleep(T) end, [500]),
    ?line ok = 	if
		    Res2 < 500*1000 -> {too_early, Res2}; % Too early
		    Res2 > 800*1000 -> {too_late, Res2};  % Too much time
		    true -> ok
		end,
    
    %% tc/1
    ?line {Res3, ok} = timer:tc(fun() -> timer:sleep(500) end),
    ?line ok = 	if
    		    Res3 < 500*1000 -> {too_early, Res3}; % Too early
    		    Res3 > 800*1000 -> {too_late, Res3};  % Too much time
    		    true -> ok
    		end,

    %% Check that timer:tc don't catch errors
    ?line ok = try timer:tc(erlang, exit, [foo]) 
	       catch exit:foo -> ok
	       end,
    
    ?line ok = try timer:tc(fun(Reason) -> 1 = Reason end, [foo]) 
	       catch error:{badmatch,_} -> ok
	       end,
    
    ?line ok = try timer:tc(fun() -> throw(foo) end) 
	       catch foo -> ok
	       end,
    
    %% Check that return values are propageted
    Self = self(),
    ?line {_, Self} = timer:tc(erlang, self, []),
    ?line {_, Self} = timer:tc(fun(P) -> P end, [self()]),
    ?line {_, Self} = timer:tc(fun() -> self() end),

    ?line Sec = timer:seconds(4),
    ?line Min = timer:minutes(4),
    ?line Hour = timer:hours(4),
    ?line MyRes = 4*1000 + 4*60*1000 + 4*60*60*1000,
    ?line if  MyRes == Sec + Min + Hour -> ok end,
    ?line TimerRes = timer:hms(4,4,4),
    ?line if MyRes == TimerRes -> ok end,
    ok.

%% Test that cancellations of one-shot timers do not accidentally
%% cancel interval timers. [OTP-2771].
unique_refs(Config) when is_list(Config) ->
    ?line ITimers = repeat_send_interval(10),		% 10 interval timers
    ?line eat_refs(?MAXREF - ?REFMARG),
    ?line set_and_cancel_one_shots(?REFMARG),
    ?line NumLeft = num_timers(),
    ?line io:format("~w timers left, should be 10\n", [NumLeft]),
    ?line cancel(ITimers),
    ?line receive_nisse(),
    ?line 10 = NumLeft.


repeat_send_interval(0) ->
    [];
repeat_send_interval(M) ->
    ?line {ok, Ref} = timer:send_interval(6000,self(), nisse),
    ?line [Ref| repeat_send_interval(M - 1)].

eat_refs(0) ->
    0;
eat_refs(N) ->
    _ = make_ref(),
    eat_refs(N-1).

set_and_cancel_one_shots(0) ->
    0;
set_and_cancel_one_shots(N) ->
    {ok, Ref} = timer:send_after(7000, self(), kalle),
    %% Cancel twice
    timer:cancel(Ref),			
    timer:cancel(Ref),
    set_and_cancel_one_shots(N-1).

cancel([T| Ts]) ->
    ?line timer:cancel(T),
    ?line cancel(Ts);
cancel([]) ->
    ok.

num_timers() ->
    {{_, TotalTimers},{_, _IntervalTimers}} = timer:get_status(),
    TotalTimers.

receive_nisse() ->    
    receive
	nisse ->
	    receive_nisse()
    after 0 ->
	    ok
    end.


get_mess(Time, Mess) -> get_mess(Time, Mess, 1).
get_mess(_, _, 0) -> ok;  % Received
get_mess(Time, Mess, N) ->
    receive 
	Mess -> get_mess(Time, Mess, N-1)
    after Time
	  -> nor   % Not Received
    end.

forever() ->
    timer:sleep(1000),
    forever().


%
% Testing for performance (on different implementations) of timers 
% 


timer_perf(Config) when is_list(Config) ->
    performance(timer).

performance(Mod) ->
    process_flag(trap_exit, true),    
    {Y,Mo,D} = date(),
    {H,M,S} = time(),
    io:format("Testing module '~p' Date: ~w/~w/~w ~w:~w:~w~n", 
	      [Mod,Y,Mo,D,H,M,S]),
    Result = big_test(Mod),
    report_result(Result).

big_test(M) ->
    Load_Pids = start_nrev(20, M),   % Increase if more load wanted :)
 
    LPids = spawn_timers(5, M, 10000, 5),

    apply(M, sleep, [4000]),
    MPids = spawn_timers(10, M, 1000, 6),

    apply(M, sleep, [3500]),
    SPids = spawn_timers(15, M, 100, 3),

    Res = wait(SPids ++ MPids ++ LPids, [], 0, M),
    
    lists:foreach(fun(Pid) -> exit(Pid, kill) end, Load_Pids),
    Res.

wait([], Res, N, _) ->
    {Res, N};
wait(Pids, ResList, N, M) ->
    receive
	{Pid, ok, Res, T} ->
	    wait(lists:delete(Pid, Pids), [{T, Res} | ResList], N, M);
	{Pid, Error}->
	    ct:fail(Error),
	    wait(lists:delete(Pid, Pids), ResList, N+1, M);
	{'EXIT', Pid, normal} ->
	    wait(lists:delete(Pid, Pids), ResList, N, M);
	{'EXIT', Pid, Reason} ->
	    ct:fail({Pid,Reason})
    end.

spawn_timers(0, _, _, _) ->
    [];
spawn_timers(N, M, T, NumIter) ->
    apply(M, sleep, [120*N]),
    Pid1 = spawn_link(?MODULE, timer, [apply, M, T, self()]),
    Pid2 = spawn_link(?MODULE, timer, [interval, M, T, self(), NumIter]),
    [Pid1, Pid2 | spawn_timers(N-1, M, T, NumIter)].

timer(apply, Mod, T, Pid) ->
    Before = system_time(),
    {ok, Ref} = apply(Mod, apply_after, [T, ?MODULE, send, [self(), done]]),
    receive 
	done ->
	    After = system_time(),
	    Pid ! {self(), ok, (After-Before) div 1000, T}
    after T*3 + 300 ->   % Watch dog
	    io:format("WARNING TIMER WATCHDOG timed out: ~w ~n", [T]),
	    timer:cancel(Ref),
	    Pid ! {self(), watch_dog_timed_out}
    end.

timer(interval, Mod, T, Pid, NumIter) ->
    Before = system_time(),
    {ok, Ref} = apply(Mod, apply_interval, [T, ?MODULE, send, [self(), done]]),
    timer_irec(Before, T, {0, NumIter}, [], {Pid, Mod, Ref}).

timer_irec(_Start, T, {N, N}, Res, {Pid, Mod, Ref}) ->
    apply(Mod, cancel, [Ref]),
    Min = lists:min(Res),
    Max = lists:max(Res),
    Tot = lists:sum(Res),
    Pid ! {self(), ok, {N, Tot, Tot div N, Min, Max}, T};
timer_irec(Start, T, {N, Max}, Res, {Pid, Mod, Ref}) ->
    receive
	done ->
	    Now = system_time(),
	    Elapsed = (Now - (Start + (N*T*1000))) div 1000,
%	    io:format("~w Now ~w Started ~w Elap ~w~n", [T,Now,Start,Elapsed]),
	    timer_irec(Start, T,
		       {N+1, Max},
		       [Elapsed | Res],
		       {Pid, Mod, Ref})
    after T*3 + 300 ->
	    apply(Mod, cancel, [Ref]),
	    io:format("WARNING: TIMER WATCHDOG timed out <Interval>~w~n",[T]),
	    Pid ! {self(), timer_watchdog_timed_out_in_interlval_test}  
    end.

%% ------------------------------------------------------- %%
%%  Small last generator

start_nrev(0, _) ->
    [];

start_nrev(N, M) ->
    Pid = spawn_link(?MODULE, do_nrev, [N, M]),
    [Pid | start_nrev(N-1, M)].

do_nrev(Sleep, Mod) ->
    apply(Mod, sleep, [50 * Sleep]),
    test(1000,"abcdefghijklmnopqrstuvxyz1234"),
    ok.

test(0,_) ->
    true;
test(N,L) ->
    nrev(L),
    test(N - 1, L).

nrev([]) ->
    [];
nrev([H|T]) ->
    append(nrev(T), [H]).
    
append([H|T],Z) ->
	[H|append(T,Z)];
append([],X) ->
	X.

system_time() ->    
    erlang:monotonic_time(micro_seconds).

%% ------------------------------------------------------- %%

report_result({Res, 0}) ->
%    io:format("DEBUG0 all ~p ~n", [Res]),
    {A_List, I_List} = split_list(Res, [], []),
    A_val = calc_a_val(A_List),
    I_val = calc_i_val(I_List),
    print_report(A_val, I_val),
    ok;

report_result({Head, N}) ->
    io:format("Test Failed: Number of internal tmo ~w~n", [N]),
    ct:fail({Head, N}).

split_list([], AL, IL) ->
    {AL, IL};
split_list([{T, {N, Tot, A, Min, Max}} | Rest], AL, IL) ->
    split_list(Rest, AL, [{T, {N, Tot, A, Min, Max}} | IL]);
split_list([Head | Rest], AL, IL) ->
    split_list(Rest, [Head | AL], IL).

split([{T, Res} | R]) ->
    split(R, {{T,[Res]}, {T*10,[]}, {T*100,[]}}).

split([{T, Res} | R], {{T,S}, M, L}) ->
    split(R, {{T,[Res|S]}, M, L});

split([{T, Res} | R], {S, {T,M}, L}) ->
    split(R, {S, {T, [Res|M]}, L});

split([{T, Res} | R], {S, M, {T,L}}) ->
    split(R, {S, M, {T, [Res|L]}});

split(_Done, Vals) ->
    Vals.

calc_a_val(List) ->
    New = lists:sort(List),
    {{T1, S}, {T2, M}, {T3, L}} = split(New),
    S2 = {length(S), lists:max(S), lists:min(S), 
	  lists:sum(S) div length(S)},
    M2 = {length(M), lists:max(M), lists:min(M), 
	  lists:sum(M) div length(M)},
    L2 = {length(L), lists:max(L), lists:min(L), 
	  lists:sum(L) div length(L)},
    [{T1, S2}, {T2, M2}, {T3, L2}].

calc_i_val(List) ->
    New =  lists:sort(List),
    {{T1, S}, {T2, M}, {T3, L}} = split(New),
    S2 = get_ivals(S),
    M2 = get_ivals(M),
    L2 = get_ivals(L),
    [{T1, S2}, {T2, M2}, {T3, L2}].

get_ivals(List) ->
    Len = length(List),
    Num = element(1, hd(List)), % Number of iterations

    LTot = lists:map(fun(X) -> element(2, X) end, List),
    LMin = lists:map(fun(X) -> element(4, X) end, List),
    LMax = lists:map(fun(X) -> element(5, X) end, List),
    
    MaxTot  = lists:max(LTot),
    MinTot  = lists:min(LTot),
    AverTot = lists:sum(LTot) div Len,
    
    IterMax = lists:max(LMax),
    IterMin = lists:min(LMin),
    IterAver= AverTot div Num,

    {Len, Num,
     {MaxTot, MinTot, AverTot}, 
     {IterMax, IterMin, IterAver}}.


print_report(A_L, I_L) ->
    io:format("~nRESULTS from timer test~n~n",[]),
    io:format("Time out times for send_after~n~n", []),
    io:format("Time No of tests  Max    Min  Average~n",[]),
    print_aval(A_L),
    io:format("Time out times for send_interval~n~n", []),
    io:format("Time No.tests  No.intvals TotMax TotMin TotAver  MaxI   MinI  AverI~n", []),
    print_ival(I_L).

print_aval([]) ->
    io:format("~n~n", []);
print_aval([{T, {L, Max, Min, Aver}}|R]) ->
    io:format("~5w ~8w ~6w ~6w ~8w ~n", 
	      [T,L,Max,Min,Aver]),
    print_aval(R).

print_ival([]) ->
    io:format("~n", []);
print_ival([{T, {Len, Num, 
		 {MaxT, MinT, AverT},
		 {MaxI, MinI, AverI}}}|R]) ->
    io:format("~5w ~6w ~10w ~8w ~6w ~6w ~6w ~6w ~6w~n", 
	      [T,Len,Num,MaxT,MinT,AverT, MaxI, MinI, AverI]),
    print_ival(R).

send(Pid, Msg) ->
    Pid ! Msg.