%% %% %CopyrightBegin% %% %% Copyright Ericsson AB 1997-2016. 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) -> timer:apply_after(500, ?MODULE, send, [self(), ok_apply]), ok = get_mess(1000, ok_apply). %% Test of send_after with time = 0. send_after1(Config) when is_list(Config) -> timer:send_after(0, ok_send1), ok = get_mess(1000, ok_send1). %% Test of send_after with time = 500. send_after2(Config) when is_list(Config) -> timer:send_after(500, self(), ok_send2), 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) -> Name = list_to_atom(pid_to_list(self())), register(Name, self()), timer:send_after(500, Name, ok_send3), ok = get_mess(2000, ok_send3), unregister(Name). %% Test of exit_after with time = 1000. exit_after1(Config) when is_list(Config) -> process_flag(trap_exit, true), Pid = spawn_link(?MODULE, forever, []), timer:exit_after(1000, Pid, exit_test1), 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) -> process_flag(trap_exit, true), Pid = spawn_link(?MODULE, forever, []), Name = list_to_atom(pid_to_list(Pid)), register(Name, Pid), timer:exit_after(1000, Name, exit_test2), ok = get_mess(2000, {'EXIT', Pid, exit_test2}). %% Test of kill_after with time = 1000. kill_after1(Config) when is_list(Config) -> process_flag(trap_exit, true), Pid = spawn_link(?MODULE, forever, []), timer:kill_after(1000, Pid), 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) -> process_flag(trap_exit, true), Pid = spawn_link(?MODULE, forever, []), Name = list_to_atom(pid_to_list(Pid)), register(Name, Pid), timer:kill_after(1000, Name), 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) -> {ok, Ref} = timer:apply_interval(1000, ?MODULE, send, [self(), apply_int]), ok = get_mess(1500, apply_int, 3), timer:cancel(Ref), 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), ok = get_mess(1500, send_int, 5), timer:cancel(Ref), 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), ok = get_mess(1500, send_int2, 2), timer:cancel(Ref), 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) -> process_flag(trap_exit, true), Name = list_to_atom(pid_to_list(self())), register(Name, self()), {ok, Ref} = timer:send_interval(1000, Name, send_int3), ok = get_mess(1500, send_int3, 2), timer:cancel(Ref), nor = get_mess(1000, send_int3), % We should receive only two unregister(Name). %% Test that send interval stops sending msg when the receiving %% process terminates. send_interval4(Config) when is_list(Config) -> timer:send_interval(500, one_time_only), receive one_time_only -> ok end, timer_server ! {'EXIT', self(), normal}, % Should remove the timer timer:send_after(600, send_intv_ok), send_intv_ok = receive Msg -> Msg end. %% Test that we can cancel a timer. cancel1(Config) when is_list(Config) -> {ok, Ref} = timer:send_after(1000, this_should_be_canceled), timer:cancel(Ref), 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) -> {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 {Res1, ok} = timer:tc(timer, sleep, [500]), ok = if Res1 < 500*1000 -> {too_early, Res1}; % Too early Res1 > 800*1000 -> {too_late, Res1}; % Too much time true -> ok end, %% tc/2 {Res2, ok} = timer:tc(fun(T) -> timer:sleep(T) end, [500]), ok = if Res2 < 500*1000 -> {too_early, Res2}; % Too early Res2 > 800*1000 -> {too_late, Res2}; % Too much time true -> ok end, %% tc/1 {Res3, ok} = timer:tc(fun() -> timer:sleep(500) end), 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 ok = try timer:tc(erlang, exit, [foo]) catch exit:foo -> ok end, ok = try timer:tc(fun(Reason) -> 1 = Reason end, [foo]) catch error:{badmatch,_} -> ok end, ok = try timer:tc(fun() -> throw(foo) end) catch foo -> ok end, %% Check that return values are propageted Self = self(), {_, Self} = timer:tc(erlang, self, []), {_, Self} = timer:tc(fun(P) -> P end, [self()]), {_, Self} = timer:tc(fun() -> self() end), Sec = timer:seconds(4), Min = timer:minutes(4), Hour = timer:hours(4), MyRes = 4*1000 + 4*60*1000 + 4*60*60*1000, if MyRes == Sec + Min + Hour -> ok end, TimerRes = timer:hms(4,4,4), 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) -> ITimers = repeat_send_interval(10), % 10 interval timers eat_refs(?MAXREF - ?REFMARG), set_and_cancel_one_shots(?REFMARG), NumLeft = num_timers(), io:format("~w timers left, should be 10\n", [NumLeft]), cancel(ITimers), receive_nisse(), 10 = NumLeft. repeat_send_interval(0) -> []; repeat_send_interval(M) -> {ok, Ref} = timer:send_interval(6000,self(), nisse), [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]) -> timer:cancel(T), 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, 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}) -> {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.