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
|
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2002-2014. 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%
%%
-module(cpu_sup_SUITE).
-include_lib("common_test/include/ct.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) ->
ok = application:start(os_mon),
Config.
end_per_suite(Config) when is_list(Config) ->
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, freebsd} ->
[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()
N = cpu_sup:nprocs(),
true = is_integer(N),
true = N>0,
true = N<1000000,
%% avg1()
Load1 = cpu_sup:avg1(),
true = is_integer(Load1),
true = Load1>0,
%% avg5()
Load5 = cpu_sup:avg5(),
true = is_integer(Load5),
true = Load5>0,
%% avg15()
Load15 = cpu_sup:avg15(),
true = is_integer(Load15),
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()
Util1 = cpu_sup:util(),
true = is_number(Util1),
true = Util1>0,
Util2 = cpu_sup:util(),
true = is_number(Util2),
true = Util2>0,
%% util([])
{all, Busy1, NonBusy1, []} = cpu_sup:util([]),
100.00 = Busy1 + NonBusy1,
%% util([detailed])
{Cpus2, Busy2, NonBusy2, []} = cpu_sup:util([detailed]),
true = lists:all(fun(X) -> is_integer(X) end, Cpus2),
true = lists:all(BusyP, Busy2),
true = lists:all(NonBusyP, NonBusy2),
100.00 = lists:foldl(Sum,0,Busy2)+lists:foldl(Sum,0,NonBusy2),
%% util([per_cpu])
[{Cpu3, Busy3, NonBusy3, []}|_] = cpu_sup:util([per_cpu]),
true = is_integer(Cpu3),
100.00 = Busy3 + NonBusy3,
%% util([detailed, per_cpu])
[{Cpu4, Busy4, NonBusy4, []}|_] =
cpu_sup:util([detailed, per_cpu]),
true = is_integer(Cpu4),
true = lists:all(BusyP, Busy2),
true = lists:all(NonBusyP, NonBusy2),
100.00 = lists:foldl(Sum,0,Busy4)+lists:foldl(Sum,0,NonBusy4),
%% bad util/1 calls
{'EXIT',{badarg,_}} = (catch cpu_sup:util(detailed)),
{'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,
cpu_sup:util(),
spawn_link(Spinner),
receive Ref -> ok end,
HighUtil1 = cpu_sup:util(),
receive after ?SPIN_TIME -> ok end,
LowUtil1 = cpu_sup:util(),
spawn_link(Spinner),
receive Ref -> ok end,
HighUtil2 = cpu_sup:util(),
receive after ?SPIN_TIME -> ok end,
LowUtil2 = cpu_sup:util(),
Utils = [{high1,HighUtil1}, {low1,LowUtil1},
{high2,HighUtil2}, {low2,LowUtil2}],
?t:format("Utils: ~p~n", [Utils]),
false = LowUtil1 > HighUtil1,
false = LowUtil1 > HighUtil2,
false = LowUtil2 > HighUtil1,
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
MonRef = erlang:monitor(process, cpu_sup),
N1 = cpu_sup:nprocs(),
true = N1>0,
%% Kill the port program
case os:cmd("kill -9 " ++ PidStr) of
[] ->
%% cpu_sup should not terminate
receive
{'DOWN', MonRef, _, _, Reason} ->
?t:fail({unexpected_exit_reason, Reason})
after 3000 ->
ok
end,
%% Give cpu_sup time to restart cpu_sup port
?t:sleep(?t:seconds(3)),
N2 = cpu_sup:nprocs(),
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) ->
ok = application:set_env(os_mon, start_cpu_sup, false),
_ = 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
0 = cpu_sup:nprocs(),
0 = cpu_sup:avg1(),
0 = cpu_sup:avg5(),
0 = cpu_sup:avg15(),
0 = cpu_sup:util(),
{all,0,0,[]} = cpu_sup:util([]),
{all,0,0,[]} = cpu_sup:util([detailed]),
{all,0,0,[]} = cpu_sup:util([per_cpu]),
{all,0,0,[]} = cpu_sup:util([detailed,per_cpu]),
ok.
restart(suite) ->
[];
restart(Config) when is_list(Config) ->
ok = application:set_env(os_mon, start_cpu_sup, true),
{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.
|
