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-rw-r--r--lib/kernel/test/os_SUITE.erl100
1 files changed, 53 insertions, 47 deletions
diff --git a/lib/kernel/test/os_SUITE.erl b/lib/kernel/test/os_SUITE.erl
index 29d8d10262..e6e8568394 100644
--- a/lib/kernel/test/os_SUITE.erl
+++ b/lib/kernel/test/os_SUITE.erl
@@ -20,9 +20,11 @@
-module(os_SUITE).
-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_group/2,end_per_group/2,
+ init_per_testcase/2,end_per_testcase/2]).
-export([space_in_cwd/1, quoting/1, cmd_unicode/1, space_in_name/1, bad_command/1,
- find_executable/1, unix_comment_in_command/1, deep_list_command/1, evil/1]).
+ find_executable/1, unix_comment_in_command/1, deep_list_command/1,
+ large_output_command/1, perf_counter_api/1]).
-include_lib("test_server/include/test_server.hrl").
@@ -30,7 +32,8 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
[space_in_cwd, quoting, cmd_unicode, space_in_name, bad_command,
- find_executable, unix_comment_in_command, deep_list_command, evil].
+ find_executable, unix_comment_in_command, deep_list_command,
+ large_output_command, perf_counter_api].
groups() ->
[].
@@ -47,6 +50,11 @@ init_per_group(_GroupName, Config) ->
end_per_group(_GroupName, Config) ->
Config.
+init_per_testcase(_TC,Config) ->
+ Config.
+
+end_per_testcase(_,_Config) ->
+ ok.
space_in_cwd(doc) ->
"Test that executing a command in a current working directory "
@@ -267,50 +275,48 @@ deep_list_command(Config) when is_list(Config) ->
%% FYI: [$e, $c, "ho"] =:= io_lib:format("ec~s", ["ho"])
ok.
-
--define(EVIL_PROCS, 100).
--define(EVIL_LOOPS, 100).
--define(PORT_CREATOR, os_cmd_port_creator).
-evil(Config) when is_list(Config) ->
- Dog = test_server:timetrap(test_server:minutes(5)),
- Parent = self(),
- Ps = lists:map(fun (N) ->
- spawn_link(fun () ->
- evil_loop(Parent, ?EVIL_LOOPS,N)
- end)
- end, lists:seq(1, ?EVIL_PROCS)),
- Devil = spawn_link(fun () -> devil(hd(Ps), hd(lists:reverse(Ps))) end),
- lists:foreach(fun (P) -> receive {P, done} -> ok end end, Ps),
- unlink(Devil),
- exit(Devil, kill),
- test_server:timetrap_cancel(Dog),
- ok.
-
-devil(P1, P2) ->
- erlang:display({?PORT_CREATOR, whereis(?PORT_CREATOR)}),
- (catch ?PORT_CREATOR ! lists:seq(1,1000000)),
- (catch ?PORT_CREATOR ! lists:seq(1,666)),
- (catch ?PORT_CREATOR ! grrrrrrrrrrrrrrrr),
- (catch ?PORT_CREATOR ! {'EXIT', P1, buhuuu}),
- (catch ?PORT_CREATOR ! {'EXIT', hd(erlang:ports()), buhuuu}),
- (catch ?PORT_CREATOR ! {'EXIT', P2, arggggggg}),
- receive after 500 -> ok end,
- (catch exit(whereis(?PORT_CREATOR), kill)),
- (catch ?PORT_CREATOR ! ">8|"),
- receive after 500 -> ok end,
- (catch exit(whereis(?PORT_CREATOR), diiiiiiiiiiiiiiiiiiiie)),
- receive after 100 -> ok end,
- devil(P1, P2).
-
-evil_loop(Parent, Loops, N) ->
- Res = integer_to_list(N),
- evil_loop(Parent, Loops, Res, "echo " ++ Res).
-
-evil_loop(Parent, 0, _Res, _Cmd) ->
- Parent ! {self(), done};
-evil_loop(Parent, Loops, Res, Cmd) ->
- comp(Res, os:cmd(Cmd)),
- evil_loop(Parent, Loops-1, Res, Cmd).
+large_output_command(doc) ->
+ "Test to take sure that the correct data is"
+ "received when doing large commands";
+large_output_command(suite) -> [];
+large_output_command(Config) when is_list(Config) ->
+ %% Maximum allowed on windows is 8192, so we test well below that
+ AAA = lists:duplicate(7000, $a),
+ comp(AAA,os:cmd("echo " ++ AAA)).
+
+%% Test that the os:perf_counter api works as expected
+perf_counter_api(_Config) ->
+
+ true = is_integer(os:perf_counter()),
+ true = os:perf_counter() > 0,
+
+ T1 = os:perf_counter(),
+ timer:sleep(100),
+ T2 = os:perf_counter(),
+ TsDiff = erlang:convert_time_unit(T2 - T1, perf_counter, nano_seconds),
+ ct:pal("T1: ~p~n"
+ "T2: ~p~n"
+ "TsDiff: ~p~n",
+ [T1,T2,TsDiff]),
+
+ %% We allow a 15% diff
+ true = TsDiff < 115000000,
+ true = TsDiff > 85000000,
+
+ T1Ms = os:perf_counter(1000),
+ timer:sleep(100),
+ T2Ms = os:perf_counter(1000),
+ MsDiff = T2Ms - T1Ms,
+ ct:pal("T1Ms: ~p~n"
+ "T2Ms: ~p~n"
+ "MsDiff: ~p~n",
+ [T1Ms,T2Ms,MsDiff]),
+
+ %% We allow a 15% diff
+ true = MsDiff < 115,
+ true = MsDiff > 85.
+
+%% Util functions
comp(Expected, Got) ->
case strip_nl(Got) of