%%
%% %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.
