diff options
Diffstat (limited to 'lib/os_mon/test/cpu_sup_SUITE.erl')
-rw-r--r-- | lib/os_mon/test/cpu_sup_SUITE.erl | 76 |
1 files changed, 51 insertions, 25 deletions
diff --git a/lib/os_mon/test/cpu_sup_SUITE.erl b/lib/os_mon/test/cpu_sup_SUITE.erl index ba28f31f26..7a8065c591 100644 --- a/lib/os_mon/test/cpu_sup_SUITE.erl +++ b/lib/os_mon/test/cpu_sup_SUITE.erl @@ -155,46 +155,72 @@ tiny_diff(A, B) -> -define(SPIN_TIME, 1000). +spinner(Parent) -> + receive + stop -> Parent ! stopped + after 0 -> spinner(Parent) + end. + %% Test utilization values util_values(Config) when is_list(Config) -> - + NrOfProcessors = + case erlang:system_info(logical_processors_available) of + unknown -> 2; + X -> X + end, Tester = self(), Ref = make_ref(), - Loop = fun (L) -> L(L) end, Spinner = fun () -> - Looper = spawn_link(fun () -> Loop(Loop) end), + Spinner = self(), + NrOfProcesses = NrOfProcessors, + Loopers = + [spawn_link(fun () -> spinner(Spinner) end) + || _ <- lists:seq(1,NrOfProcesses)], receive after ?SPIN_TIME -> ok end, - unlink(Looper), - exit(Looper, kill), + [begin + Looper ! stop, + receive stopped -> ok end + end + || Looper <- Loopers], Tester ! Ref end, - + Spin = fun () -> + spawn_link(Spinner), + receive Ref -> ok end + 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(), + LowUtil0 = cpu_sup:util(), + case LowUtil0 of + U when U > ((100.0 / NrOfProcessors) * 0.33) -> + %% We cannot run this test if the system is doing other + %% work at the same time as the result will be unreliable + {skip, io_lib:format("CPU utilization was too high (~f%)", [LowUtil0])}; + _ -> + cpu_sup:util(), + Spin(), + HighUtil1 = cpu_sup:util(), - spawn_link(Spinner), - receive Ref -> ok end, - HighUtil2 = cpu_sup:util(), + receive after ?SPIN_TIME -> ok end, + LowUtil1 = cpu_sup:util(), - receive after ?SPIN_TIME -> ok end, - LowUtil2 = cpu_sup:util(), + Spin(), + HighUtil2 = cpu_sup:util(), - Utils = [{high1,HighUtil1}, {low1,LowUtil1}, - {high2,HighUtil2}, {low2,LowUtil2}], - io:format("Utils: ~p~n", [Utils]), + receive after ?SPIN_TIME -> ok end, + LowUtil2 = cpu_sup:util(), - false = LowUtil1 > HighUtil1, - false = LowUtil1 > HighUtil2, - false = LowUtil2 > HighUtil1, - false = LowUtil2 > HighUtil2, + Utils = [{high1,HighUtil1}, {low1,LowUtil1}, + {high2,HighUtil2}, {low2,LowUtil2}], + io:format("Utils: ~p~n", [Utils]), - ok. + false = LowUtil1 > HighUtil1, + false = LowUtil1 > HighUtil2, + false = LowUtil2 > HighUtil1, + false = LowUtil2 > HighUtil2, + + ok + end. % Outdated |