%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2002-2010. 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
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%
-module(cpu_sup_SUITE).
-include_lib("test_server/include/test_server.hrl").
%% Test server specific exports
-export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2]).
-export([init_per_suite/1, end_per_suite/1]).
-export([init_per_testcase/2, end_per_testcase/2]).
%% Test cases
-export([load_api/1]).
-export([util_api/1, util_values/1]).
-export([port/1]).
-export([terminate/1, unavailable/1, restart/1]).
%% Default timetrap timeout (set in init_per_testcase)
-define(default_timeout, ?t:minutes(1)).
init_per_suite(Config) when is_list(Config) ->
?line ok = application:start(os_mon),
Config.
end_per_suite(Config) when is_list(Config) ->
?line ok = application:stop(os_mon),
Config.
init_per_testcase(unavailable, Config) ->
terminate(Config),
init_per_testcase(dummy, Config);
init_per_testcase(_Case, Config) ->
Dog = ?t:timetrap(?default_timeout),
[{watchdog, Dog} | Config].
end_per_testcase(unavailable, Config) ->
restart(Config),
end_per_testcase(dummy, Config);
end_per_testcase(_Case, Config) ->
Dog = ?config(watchdog, Config),
?t:timetrap_cancel(Dog),
ok.
suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
case test_server:os_type() of
{unix, sunos} ->
[load_api, util_api, util_values, port, unavailable];
{unix, linux} ->
[load_api, util_api, util_values, port, unavailable];
{unix, _OSname} -> [load_api];
_OS -> [unavailable]
end.
groups() ->
[].
init_per_group(_GroupName, Config) ->
Config.
end_per_group(_GroupName, Config) ->
Config.
load_api(suite) ->
[];
load_api(doc) ->
["Test of load API functions"];
load_api(Config) when is_list(Config) ->
%% nprocs()
?line N = cpu_sup:nprocs(),
?line true = is_integer(N),
?line true = N>0,
%% avg1()
?line Load1 = cpu_sup:avg1(),
?line true = is_integer(Load1),
?line true = Load1>0,
%% avg5()
?line Load5 = cpu_sup:avg5(),
?line true = is_integer(Load5),
?line true = Load5>0,
%% avg15()
?line Load15 = cpu_sup:avg15(),
?line true = is_integer(Load15),
?line true = Load15>0,
ok.
util_api(suite) ->
[];
util_api(doc) ->
["Test of utilization API functions"];
util_api(Config) when is_list(Config) ->
%% Some useful funs when testing util/1
BusyP = fun({user, _Share}) -> true;
({nice_user, _Share}) -> true;
({kernel, _Share}) -> true;
({hard_irq, _Share}) -> true;
({soft_irq, _Share}) -> true;
(_) -> false
end,
NonBusyP = fun({wait, _Share}) -> true;
({idle, _Share}) -> true;
({steal, _Share}) -> true;
(_) -> false
end,
Sum = fun({_Tag, X}, Acc) -> Acc+X end,
%% util()
?line Util1 = cpu_sup:util(),
?line true = is_number(Util1),
?line true = Util1>0,
?line Util2 = cpu_sup:util(),
?line true = is_number(Util2),
?line true = Util2>0,
%% util([])
?line {all, Busy1, NonBusy1, []} = cpu_sup:util([]),
?line 100.00 = Busy1 + NonBusy1,
%% util([detailed])
?line {Cpus2, Busy2, NonBusy2, []} = cpu_sup:util([detailed]),
?line true = lists:all(fun(X) -> is_integer(X) end, Cpus2),
?line true = lists:all(BusyP, Busy2),
?line true = lists:all(NonBusyP, NonBusy2),
?line 100.00 = lists:foldl(Sum,0,Busy2)+lists:foldl(Sum,0,NonBusy2),
%% util([per_cpu])
?line [{Cpu3, Busy3, NonBusy3, []}|_] = cpu_sup:util([per_cpu]),
?line true = is_integer(Cpu3),
?line 100.00 = Busy3 + NonBusy3,
%% util([detailed, per_cpu])
?line [{Cpu4, Busy4, NonBusy4, []}|_] =
cpu_sup:util([detailed, per_cpu]),
?line true = is_integer(Cpu4),
?line true = lists:all(BusyP, Busy2),
?line true = lists:all(NonBusyP, NonBusy2),
?line 100.00 = lists:foldl(Sum,0,Busy4)+lists:foldl(Sum,0,NonBusy4),
%% bad util/1 calls
?line {'EXIT',{badarg,_}} = (catch cpu_sup:util(detailed)),
?line {'EXIT',{badarg,_}} = (catch cpu_sup:util([detialed])),
ok.
-define(SPIN_TIME, 1000).
util_values(suite) ->
[];
util_values(doc) ->
["Test utilization values"];
util_values(Config) when is_list(Config) ->
Tester = self(),
Ref = make_ref(),
Loop = fun (L) -> L(L) end,
Spinner = fun () ->
Looper = spawn_link(fun () -> Loop(Loop) end),
receive after ?SPIN_TIME -> ok end,
unlink(Looper),
exit(Looper, kill),
Tester ! Ref
end,
?line cpu_sup:util(),
?line spawn_link(Spinner),
?line receive Ref -> ok end,
?line HighUtil1 = cpu_sup:util(),
?line receive after ?SPIN_TIME -> ok end,
?line LowUtil1 = cpu_sup:util(),
?line spawn_link(Spinner),
?line receive Ref -> ok end,
?line HighUtil2 = cpu_sup:util(),
?line receive after ?SPIN_TIME -> ok end,
?line LowUtil2 = cpu_sup:util(),
Utils = [{high1,HighUtil1}, {low1,LowUtil1},
{high2,HighUtil2}, {low2,LowUtil2}],
?t:format("Utils: ~p~n", [Utils]),
?line false = LowUtil1 > HighUtil1,
?line false = LowUtil1 > HighUtil2,
?line false = LowUtil2 > HighUtil1,
?line false = LowUtil2 > HighUtil2,
ok.
% Outdated
% The portprogram is now restarted if killed, and not by os_mon...
port(suite) ->
[];
port(doc) ->
["Test that cpu_sup handles a terminating port program"];
port(Config) when is_list(Config) ->
case cpu_sup_os_pid() of
{ok, PidStr} ->
%% Monitor cpu_sup
?line MonRef = erlang:monitor(process, cpu_sup),
?line N1 = cpu_sup:nprocs(),
?line true = N1>0,
%% Kill the port program
case os:cmd("kill -9 " ++ PidStr) of
[] ->
%% cpu_sup should not terminate
receive
{'DOWN', MonRef, _, _, Reason} ->
?line ?t:fail({unexpected_exit_reason, Reason})
after 3000 ->
ok
end,
%% Give cpu_sup time to restart cpu_sup port
?t:sleep(?t:seconds(3)),
?line N2 = cpu_sup:nprocs(),
?line true = N2>0,
erlang:demonitor(MonRef),
ok;
Line ->
erlang:demonitor(MonRef),
{skip, {not_killed, Line}}
end;
_ ->
{skip, os_pid_not_found }
end.
terminate(suite) ->
[];
terminate(Config) when is_list(Config) ->
?line ok = application:set_env(os_mon, start_cpu_sup, false),
?line ok = supervisor:terminate_child(os_mon_sup, cpu_sup),
ok.
unavailable(suite) ->
[];
unavailable(doc) ->
["Test correct behaviour when service is unavailable"];
unavailable(Config) when is_list(Config) ->
%% Make sure all API functions return their dummy values
?line 0 = cpu_sup:nprocs(),
?line 0 = cpu_sup:avg1(),
?line 0 = cpu_sup:avg5(),
?line 0 = cpu_sup:avg15(),
?line 0 = cpu_sup:util(),
?line {all,0,0,[]} = cpu_sup:util([]),
?line {all,0,0,[]} = cpu_sup:util([detailed]),
?line {all,0,0,[]} = cpu_sup:util([per_cpu]),
?line {all,0,0,[]} = cpu_sup:util([detailed,per_cpu]),
ok.
restart(suite) ->
[];
restart(Config) when is_list(Config) ->
?line ok = application:set_env(os_mon, start_cpu_sup, true),
?line {ok, _Pid} = supervisor:restart_child(os_mon_sup, cpu_sup),
ok.
%% Aux
cpu_sup_os_pid() ->
Str = os:cmd("ps -e | grep '[c]pu_sup'"),
case io_lib:fread("~s", Str) of
{ok, [Pid], _Rest} -> {ok, Pid};
_ -> {error, pid_not_found}
end.
