diff options
Diffstat (limited to 'erts/emulator/test/process_SUITE.erl')
| -rw-r--r-- | erts/emulator/test/process_SUITE.erl | 83 |
1 files changed, 56 insertions, 27 deletions
diff --git a/erts/emulator/test/process_SUITE.erl b/erts/emulator/test/process_SUITE.erl index e14185e881..4204d12eb3 100644 --- a/erts/emulator/test/process_SUITE.erl +++ b/erts/emulator/test/process_SUITE.erl @@ -134,6 +134,11 @@ init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) -> [{testcase, Func}|Config]. end_per_testcase(Func, Config) when is_atom(Func), is_list(Config) -> + %% Restore max_heap_size to default value. + erlang:system_flag(max_heap_size, + #{size => 0, + kill => true, + error_logger => true}), ok. fun_spawn(Fun) -> @@ -1024,36 +1029,48 @@ bump_big(Prev, Limit) -> %% Priority 'low' should be mixed with 'normal' using a factor of %% about 8. (OTP-2644) low_prio(Config) when is_list(Config) -> - case erlang:system_info(schedulers_online) of - 1 -> - ok = low_prio_test(Config); - _ -> - erlang:system_flag(multi_scheduling, block_normal), - ok = low_prio_test(Config), - erlang:system_flag(multi_scheduling, unblock_normal), - {comment, - "Test not written for SMP runtime system. " - "Multi scheduling blocked during test."} - end. + erlang:system_flag(multi_scheduling, block_normal), + Prop = low_prio_test(Config), + erlang:system_flag(multi_scheduling, unblock_normal), + Str = lists:flatten(io_lib:format("Low/high proportion is ~.3f", + [Prop])), + {comment,Str}. low_prio_test(Config) when is_list(Config) -> process_flag(trap_exit, true), - S = spawn_link(?MODULE, prio_server, [0, 0]), + + %% Spawn the server running with high priority. The server must + %% not run at normal priority as that would skew the results for + %% two reasons: + %% + %% 1. There would be one more normal-priority processes than + %% low-priority processes. + %% + %% 2. The receive queue would grow faster than the server process + %% could process it. That would in turn trigger the reduction + %% punishment for the clients. + S = spawn_opt(?MODULE, prio_server, [0, 0], [link,{priority,high}]), + + %% Spawn the clients and let them run for a while. PCs = spawn_prio_clients(S, erlang:system_info(schedulers_online)), - ct:sleep({seconds,3}), + ct:sleep({seconds,2}), lists:foreach(fun (P) -> exit(P, kill) end, PCs), + + %% Stop the server and retrieve the result. S ! exit, - receive {'EXIT', S, {A, B}} -> check_prio(A, B) end, - ok. + receive + {'EXIT', S, {A, B}} -> + check_prio(A, B) + end. check_prio(A, B) -> Prop = A/B, ok = io:format("Low=~p, High=~p, Prop=~p\n", [A, B, Prop]), - %% It isn't 1/8, it's more like 0.3, but let's check that - %% the low-prio processes get some little chance to run at all. - true = (Prop < 1.0), - true = (Prop > 1/32). + %% Prop is expected to be appr. 1/8. Allow a reasonable margin. + true = Prop < 1/4, + true = Prop > 1/16, + Prop. prio_server(A, B) -> receive @@ -2057,6 +2074,7 @@ max_heap_size_test(Option, Size, Kill, ErrorLogger) -> end, if ErrorLogger -> receive + %% There must be at least one error message. {error, _, {emulator, _, [Pid|_]}} -> ok end; @@ -2069,22 +2087,33 @@ max_heap_size_test(Option, Size, Kill, ErrorLogger) -> {'DOWN', Ref, process, Pid, die} -> ok end, - flush(); + %% If the process was not killed, the limit may have + %% been reached more than once and there may be + %% more {error, ...} messages left. + receive_error_messages(Pid); true -> ok end, + + %% Make sure that there are no unexpected messages. + receive_unexpected(). + +receive_error_messages(Pid) -> receive - M -> - ct:fail({unexpected_message, M}) - after 10 -> + {error, _, {emulator, _, [Pid|_]}} -> + receive_error_messages(Pid) + after 1000 -> ok end. -flush() -> +receive_unexpected() -> receive - _M -> - flush() - after 1000 -> + {info_report, _, _} -> + %% May be an alarm message from os_mon. Ignore. + receive_unexpected(); + M -> + ct:fail({unexpected_message, M}) + after 10 -> ok end. |