From d4341cd249d728174fce580bd018e1e8b402d161 Mon Sep 17 00:00:00 2001 From: Dan Gudmundsson Date: Mon, 20 Nov 2017 15:23:24 +0100 Subject: kernel: add a resource reference counter System resources/functionality may need to be reference counted to be handled correctly when used or enabled/disabled from more than one process or application. It is easier to handle this in erlang code than in erts, so make a process that deals with the housekeeping. --- lib/kernel/src/Makefile | 1 + lib/kernel/src/kernel.app.src | 2 + lib/kernel/src/kernel.erl | 11 +++- lib/kernel/src/kernel_refc.erl | 139 +++++++++++++++++++++++++++++++++++++++ lib/kernel/test/kernel_SUITE.erl | 69 ++++++++++++++++++- 5 files changed, 218 insertions(+), 4 deletions(-) create mode 100644 lib/kernel/src/kernel_refc.erl diff --git a/lib/kernel/src/Makefile b/lib/kernel/src/Makefile index 5946620f0f..acfcca55e5 100644 --- a/lib/kernel/src/Makefile +++ b/lib/kernel/src/Makefile @@ -106,6 +106,7 @@ MODULES = \ inet_sctp \ kernel \ kernel_config \ + kernel_refc \ local_udp \ local_tcp \ net \ diff --git a/lib/kernel/src/kernel.app.src b/lib/kernel/src/kernel.app.src index 080b11fc4d..3136db8267 100644 --- a/lib/kernel/src/kernel.app.src +++ b/lib/kernel/src/kernel.app.src @@ -57,6 +57,7 @@ inet_tcp_dist, kernel, kernel_config, + kernel_refc, local_tcp, local_udp, net, @@ -107,6 +108,7 @@ heart, init, kernel_config, + kernel_refc, kernel_sup, net_kernel, net_sup, diff --git a/lib/kernel/src/kernel.erl b/lib/kernel/src/kernel.erl index cba57088ec..0382764b39 100644 --- a/lib/kernel/src/kernel.erl +++ b/lib/kernel/src/kernel.erl @@ -111,6 +111,13 @@ init([]) -> type => worker, modules => [kernel_config]}, + RefC = #{id => kernel_refc, + start => {kernel_refc, start_link, []}, + restart => permanent, + shutdown => 2000, + type => worker, + modules => [kernel_refc]}, + Code = #{id => code_server, start => {code, start_link, []}, restart => permanent, @@ -148,7 +155,7 @@ init([]) -> case init:get_argument(mode) of {ok, [["minimal"]]} -> - {ok, {SupFlags, [Code, File, StdError, User, Config, SafeSup]}}; + {ok, {SupFlags, [Code, File, StdError, User, Config, RefC, SafeSup]}}; _ -> Rpc = #{id => rex, start => {rpc, start_link, []}, @@ -199,7 +206,7 @@ init([]) -> {ok, {SupFlags, [Code, Rpc, Global, InetDb | DistAC] ++ [NetSup, GlGroup, File, SigSrv, - StdError, User, Config, SafeSup] ++ Timer}} + StdError, User, Config, RefC, SafeSup] ++ Timer}} end; init(safe) -> SupFlags = #{strategy => one_for_one, diff --git a/lib/kernel/src/kernel_refc.erl b/lib/kernel/src/kernel_refc.erl new file mode 100644 index 0000000000..3ad68e9ff9 --- /dev/null +++ b/lib/kernel/src/kernel_refc.erl @@ -0,0 +1,139 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 2017. 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(kernel_refc). + +-behaviour(gen_server). + +%% External exports +-export([start_link/0, scheduler_wall_time/1]). +%% Internal exports +-export([init/1, handle_info/2, terminate/2]). +-export([handle_call/3, handle_cast/2, code_change/3]). + +%%%----------------------------------------------------------------- +%%% This module implements a process that handles reference counters for +%%% various erts or other kernel resources which needs reference counting. +%%% +%%% Should not be documented nor used directly by user applications. +%%%----------------------------------------------------------------- +start_link() -> + gen_server:start_link({local,kernel_refc}, kernel_refc, [], []). + +-spec scheduler_wall_time(boolean()) -> boolean(). +scheduler_wall_time(Bool) -> + gen_server:call(kernel_refc, {scheduler_wall_time, self(), Bool}). + +%%----------------------------------------------------------------- +%% Callback functions from gen_server +%%----------------------------------------------------------------- + +-spec init([]) -> {'ok', map()} | {'stop', term()}. + +init([]) -> + resource(scheduler_wall_time, false), + {ok, #{scheduler_wall_time=>#{}}}. + +-spec handle_call(term(), term(), State) -> {'reply', term(), State}. +handle_call({What, Who, false}, _From, State) -> + {Reply, Cnt} = do_stop(What, maps:get(What, State), Who), + {reply, Reply, State#{What:=Cnt}}; +handle_call({What, Who, true}, _From, State) -> + {Reply, Cnt} = do_start(What, maps:get(What, State), Who), + {reply, Reply, State#{What:=Cnt}}; +handle_call(_, _From, State) -> + {reply, badarg, State}. + +-spec handle_cast(term(), State) -> {'noreply', State}. +handle_cast(_, State) -> + {noreply, State}. + +-spec handle_info(term(), State) -> {'noreply', State}. +handle_info({'DOWN', _Ref, process, Pid, _}, State) -> + Cleanup = fun(Resource, Cnts) -> + cleanup(Resource, Cnts, Pid) + end, + {noreply, maps:map(Cleanup, State)}; +handle_info(_, State) -> + {noreply, State}. + +-spec terminate(term(), term()) -> 'ok'. +terminate(_Reason, _State) -> + ok. + +-spec code_change(term(), State, term()) -> {'ok', State}. +code_change(_OldVsn, State, _Extra) -> + {ok, State}. + +%%----------------------------------------------------------------- +%% Internal functions +%%----------------------------------------------------------------- + +do_start(Resource, Cnt, Pid) -> + case maps:get(Pid, Cnt, undefined) of + undefined -> + Ref = erlang:monitor(process, Pid), + case any(Cnt) of + true -> + {true, Cnt#{Pid=>{1, Ref}}}; + false -> + resource(Resource, true), + {false, Cnt#{Pid=>{1, Ref}}} + end; + {N, Ref} -> + {true, Cnt#{Pid=>{N+1, Ref}}} + end. + +do_stop(Resource, Cnt0, Pid) -> + case maps:get(Pid, Cnt0, undefined) of + undefined -> + {any(Cnt0), Cnt0}; + {1, Ref} -> + erlang:demonitor(Ref, [flush]), + Cnt = maps:remove(Pid, Cnt0), + case any(Cnt) of + true -> + {true, Cnt}; + false -> + resource(Resource, false), + {true, Cnt} + end; + {N, Ref} -> + {true, Cnt0#{Pid=>{N-1, Ref}}} + end. + +cleanup(Resource, Cnt0, Pid) -> + case maps:is_key(Pid, Cnt0) of + true -> + Cnt = maps:remove(Pid, Cnt0), + case any(Cnt) of + true -> + Cnt; + false -> + resource(Resource, false), + Cnt + end; + false -> + Cnt0 + end. + +any(Cnt) -> maps:size(Cnt) > 0. + +resource(scheduler_wall_time, Enable) -> + _ = erlang:system_flag(scheduler_wall_time, Enable). diff --git a/lib/kernel/test/kernel_SUITE.erl b/lib/kernel/test/kernel_SUITE.erl index da56359294..7898988dbe 100644 --- a/lib/kernel/test/kernel_SUITE.erl +++ b/lib/kernel/test/kernel_SUITE.erl @@ -30,14 +30,14 @@ -export([init_per_testcase/2, end_per_testcase/2]). %% Test cases must be exported. --export([app_test/1, appup_test/1]). +-export([app_test/1, appup_test/1, refc/1]). suite() -> [{ct_hooks,[ts_install_cth]}, {timetrap,{minutes,2}}]. all() -> - [app_test, appup_test]. + [app_test, appup_test, refc]. groups() -> []. @@ -163,3 +163,68 @@ check_appup([Vsn|Vsns],Instrs,Expected) -> end; check_appup([],_,_) -> ok. + +%%% Check that refc module handles the counters as expected +refc(_Config) -> + Enable = fun(Enable) -> erlang:system_flag(scheduler_wall_time, Enable) end, + IsOn = fun() -> undefined /= erlang:statistics(scheduler_wall_time) end, + Tester = self(), + Loop = fun Loop() -> + receive + die -> normal; + {apply, Bool} -> + Res = Enable(Bool), + Tester ! {self(), Res}, + Loop() + end + end, + + %% Counter should be 0 + false = Enable(false), + + false = Enable(true), + true = Enable(true), + true = Enable(false), + true = Enable(false), + + %% Counter should be 0 + false = IsOn(), + + P1 = spawn_link(Loop), + P1 ! {apply, true}, + receive {P1, R1} -> false = R1 end, + + %% P1 has turned it on counter should be one + true = IsOn(), + true = Enable(true), + true = Enable(false), + true = IsOn(), + + P1 ! {apply, false}, + receive {P1, R2} -> true = R2 end, + false = IsOn(), + + P1 ! {apply, true}, + receive {P1, R3} -> false = R3 end, + true = IsOn(), + true = Enable(false), + + + P1 ! die, + timer:sleep(100), + false = IsOn(), + false = Enable(false), + + P2 = spawn_link(Loop), + P2 ! {apply, true}, + receive {P2, R4} -> false = R4 end, + true = IsOn(), + P2 ! {apply, true}, + receive {P2, R5} -> true = R5 end, + true = IsOn(), + + P2 ! die, + timer:sleep(100), + false = IsOn(), + + ok. -- cgit v1.2.1 From 7f6ac587f47bd115604c7c9d1504e66cafffd265 Mon Sep 17 00:00:00 2001 From: Rickard Green Date: Tue, 28 Nov 2017 14:17:24 +0100 Subject: Redirect system_flag(scheduler_wall_time,_) to kernel_refc --- erts/emulator/beam/atom.names | 1 + erts/emulator/beam/bif.c | 32 ++++++++++++--------- erts/emulator/beam/bif.tab | 2 ++ erts/emulator/beam/erl_bif_info.c | 2 +- erts/preloaded/ebin/erlang.beam | Bin 104312 -> 103008 bytes erts/preloaded/ebin/erts_internal.beam | Bin 12336 -> 13964 bytes erts/preloaded/src/erlang.erl | 36 +---------------------- erts/preloaded/src/erts_internal.erl | 51 +++++++++++++++++++++++++++++++++ lib/kernel/src/kernel_refc.erl | 4 +-- lib/tools/emacs/erlang.el | 2 -- 10 files changed, 77 insertions(+), 53 deletions(-) diff --git a/erts/emulator/beam/atom.names b/erts/emulator/beam/atom.names index cef633bd93..cb4fab51f1 100644 --- a/erts/emulator/beam/atom.names +++ b/erts/emulator/beam/atom.names @@ -641,6 +641,7 @@ atom suspending atom sys_misc atom system atom system_error +atom system_flag_scheduler_wall_time atom system_limit atom system_version atom system_architecture diff --git a/erts/emulator/beam/bif.c b/erts/emulator/beam/bif.c index 50699eac31..6684803bb8 100644 --- a/erts/emulator/beam/bif.c +++ b/erts/emulator/beam/bif.c @@ -59,6 +59,7 @@ Export *erts_convert_time_unit_trap = NULL; static Export *await_msacc_mod_trap = NULL; static erts_atomic32_t msacc; +static Export *system_flag_scheduler_wall_time_trap; static Export *await_sched_wall_time_mod_trap; static erts_atomic32_t sched_wall_time; @@ -4496,7 +4497,7 @@ BIF_RETTYPE group_leader_2(BIF_ALIST_2) BIF_ERROR(BIF_P, BADARG); } } - + BIF_RETTYPE system_flag_2(BIF_ALIST_2) { Sint n; @@ -4714,17 +4715,9 @@ BIF_RETTYPE system_flag_2(BIF_ALIST_2) BIF_RET(am_true); } else if (BIF_ARG_1 == am_scheduler_wall_time) { - if (BIF_ARG_2 == am_true || BIF_ARG_2 == am_false) { - erts_aint32_t new = BIF_ARG_2 == am_true ? 1 : 0; - erts_aint32_t old = erts_atomic32_xchg_nob(&sched_wall_time, - new); - Eterm ref = erts_sched_wall_time_request(BIF_P, 1, new, 0, 0); - ASSERT(is_value(ref)); - BIF_TRAP2(await_sched_wall_time_mod_trap, - BIF_P, - ref, - old ? am_true : am_false); - } + if (BIF_ARG_2 == am_true || BIF_ARG_2 == am_false) + BIF_TRAP1(system_flag_scheduler_wall_time_trap, + BIF_P, BIF_ARG_2); } else if (BIF_ARG_1 == am_dirty_cpu_schedulers_online) { Sint old_no; if (!is_small(BIF_ARG_2)) @@ -4836,6 +4829,17 @@ BIF_RETTYPE system_flag_2(BIF_ALIST_2) BIF_ERROR(BIF_P, BADARG); } +BIF_RETTYPE erts_internal_scheduler_wall_time_1(BIF_ALIST_1) +{ + erts_aint32_t new = BIF_ARG_1 == am_true ? 1 : 0; + erts_aint32_t old = erts_atomic32_xchg_nob(&sched_wall_time, + new); + Eterm ref = erts_sched_wall_time_request(BIF_P, 1, new, 0, 0); + ASSERT(is_value(ref)); + BIF_TRAP2(await_sched_wall_time_mod_trap, + BIF_P, ref, old ? am_true : am_false); +} + /**********************************************************************/ BIF_RETTYPE phash_2(BIF_ALIST_2) @@ -5094,8 +5098,10 @@ void erts_init_bif(void) await_proc_exit_trap = erts_export_put(am_erlang,am_await_proc_exit,3); await_port_send_result_trap = erts_export_put(am_erts_internal, am_await_port_send_result, 3); + system_flag_scheduler_wall_time_trap + = erts_export_put(am_erts_internal, am_system_flag_scheduler_wall_time, 1); await_sched_wall_time_mod_trap - = erts_export_put(am_erlang, am_await_sched_wall_time_modifications, 2); + = erts_export_put(am_erts_internal, am_await_sched_wall_time_modifications, 2); await_msacc_mod_trap = erts_export_put(am_erts_internal, am_await_microstate_accounting_modifications, 3); diff --git a/erts/emulator/beam/bif.tab b/erts/emulator/beam/bif.tab index 1bd4acbf95..33f6eef652 100644 --- a/erts/emulator/beam/bif.tab +++ b/erts/emulator/beam/bif.tab @@ -185,6 +185,8 @@ bif erts_internal:system_check/1 bif erts_internal:release_literal_area_switch/0 +bif erts_internal:scheduler_wall_time/1 + # inet_db support bif erlang:port_set_data/2 bif erlang:port_get_data/1 diff --git a/erts/emulator/beam/erl_bif_info.c b/erts/emulator/beam/erl_bif_info.c index 9d05680723..b9d8f9d6e9 100644 --- a/erts/emulator/beam/erl_bif_info.c +++ b/erts/emulator/beam/erl_bif_info.c @@ -4758,7 +4758,7 @@ erts_bif_info_init(void) alloc_info_trap = erts_export_put(am_erlang, am_alloc_info, 1); alloc_sizes_trap = erts_export_put(am_erlang, am_alloc_sizes, 1); gather_sched_wall_time_res_trap - = erts_export_put(am_erlang, am_gather_sched_wall_time_result, 1); + = erts_export_put(am_erts_internal, am_gather_sched_wall_time_result, 1); gather_gc_info_res_trap = erts_export_put(am_erlang, am_gather_gc_info_result, 1); gather_io_bytes_trap diff --git a/erts/preloaded/ebin/erlang.beam b/erts/preloaded/ebin/erlang.beam index 7ee47ee023..f0da8b5869 100644 Binary files a/erts/preloaded/ebin/erlang.beam and b/erts/preloaded/ebin/erlang.beam differ diff --git a/erts/preloaded/ebin/erts_internal.beam b/erts/preloaded/ebin/erts_internal.beam index f8871c63eb..7d2edd9845 100644 Binary files a/erts/preloaded/ebin/erts_internal.beam and b/erts/preloaded/ebin/erts_internal.beam differ diff --git a/erts/preloaded/src/erlang.erl b/erts/preloaded/src/erlang.erl index 2be053575b..f3c83b9949 100644 --- a/erts/preloaded/src/erlang.erl +++ b/erts/preloaded/src/erlang.erl @@ -43,9 +43,7 @@ -export([memory/0, memory/1]). -export([alloc_info/1, alloc_sizes/1]). --export([gather_sched_wall_time_result/1, - await_sched_wall_time_modifications/2, - gather_gc_info_result/1]). +-export([gather_gc_info_result/1]). -export([dist_ctrl_input_handler/2, dist_ctrl_put_data/2, @@ -3980,38 +3978,6 @@ receive_allocator(Ref, N, Acc) -> receive_allocator(Ref, N-1, insert_info(InfoList, Acc)) end. --spec erlang:await_sched_wall_time_modifications(Ref, Result) -> boolean() when - Ref :: reference(), - Result :: boolean(). - -await_sched_wall_time_modifications(Ref, Result) -> - sched_wall_time(Ref, erlang:system_info(schedulers)), - Result. - --spec erlang:gather_sched_wall_time_result(Ref) -> [{pos_integer(), - non_neg_integer(), - non_neg_integer()}] when - Ref :: reference(). - -gather_sched_wall_time_result(Ref) when erlang:is_reference(Ref) -> - sched_wall_time(Ref, erlang:system_info(schedulers), []). - -sched_wall_time(_Ref, 0) -> - ok; -sched_wall_time(Ref, N) -> - receive Ref -> sched_wall_time(Ref, N-1) end. - -sched_wall_time(_Ref, 0, Acc) -> - Acc; -sched_wall_time(Ref, N, undefined) -> - receive {Ref, _} -> sched_wall_time(Ref, N-1, undefined) end; -sched_wall_time(Ref, N, Acc) -> - receive - {Ref, undefined} -> sched_wall_time(Ref, N-1, undefined); - {Ref, SWTL} when erlang:is_list(SWTL) -> sched_wall_time(Ref, N-1, Acc ++ SWTL); - {Ref, SWT} -> sched_wall_time(Ref, N-1, [SWT|Acc]) - end. - -spec erlang:gather_gc_info_result(Ref) -> {number(),number(),0} when Ref :: reference(). diff --git a/erts/preloaded/src/erts_internal.erl b/erts/preloaded/src/erts_internal.erl index ffa9217c4d..a083e9ac2f 100644 --- a/erts/preloaded/src/erts_internal.erl +++ b/erts/preloaded/src/erts_internal.erl @@ -66,6 +66,10 @@ -export([new_connection/1]). -export([abort_connection/2]). +-export([scheduler_wall_time/1, system_flag_scheduler_wall_time/1, + gather_sched_wall_time_result/1, + await_sched_wall_time_modifications/2]). + %% Auto import name clash -export([check_process_code/1]). @@ -517,3 +521,50 @@ new_connection(_Node) -> ConnId :: {integer(), erlang:dist_handle()}. abort_connection(_Node, _ConnId) -> erlang:nif_error(undefined). + +%% Scheduler wall time + +-spec erts_internal:system_flag_scheduler_wall_time(Enable) -> boolean() when + Enable :: boolean(). + +system_flag_scheduler_wall_time(Bool) -> + kernel_refc:scheduler_wall_time(Bool). + + +-spec erts_internal:await_sched_wall_time_modifications(Ref, Result) -> boolean() when + Ref :: reference(), + Result :: boolean(). + +-spec erts_internal:scheduler_wall_time(Enable) -> boolean() when + Enable :: boolean(). + +scheduler_wall_time(_Enable) -> + erlang:nif_error(undefined). + +await_sched_wall_time_modifications(Ref, Result) -> + sched_wall_time(Ref, erlang:system_info(schedulers)), + Result. + +-spec erts_internal:gather_sched_wall_time_result(Ref) -> [{pos_integer(), + non_neg_integer(), + non_neg_integer()}] when + Ref :: reference(). + +gather_sched_wall_time_result(Ref) when erlang:is_reference(Ref) -> + sched_wall_time(Ref, erlang:system_info(schedulers), []). + +sched_wall_time(_Ref, 0) -> + ok; +sched_wall_time(Ref, N) -> + receive Ref -> sched_wall_time(Ref, N-1) end. + +sched_wall_time(_Ref, 0, Acc) -> + Acc; +sched_wall_time(Ref, N, undefined) -> + receive {Ref, _} -> sched_wall_time(Ref, N-1, undefined) end; +sched_wall_time(Ref, N, Acc) -> + receive + {Ref, undefined} -> sched_wall_time(Ref, N-1, undefined); + {Ref, SWTL} when erlang:is_list(SWTL) -> sched_wall_time(Ref, N-1, Acc ++ SWTL); + {Ref, SWT} -> sched_wall_time(Ref, N-1, [SWT|Acc]) + end. diff --git a/lib/kernel/src/kernel_refc.erl b/lib/kernel/src/kernel_refc.erl index 3ad68e9ff9..05076dc885 100644 --- a/lib/kernel/src/kernel_refc.erl +++ b/lib/kernel/src/kernel_refc.erl @@ -38,7 +38,7 @@ start_link() -> -spec scheduler_wall_time(boolean()) -> boolean(). scheduler_wall_time(Bool) -> - gen_server:call(kernel_refc, {scheduler_wall_time, self(), Bool}). + gen_server:call(kernel_refc, {scheduler_wall_time, self(), Bool}, infinity). %%----------------------------------------------------------------- %% Callback functions from gen_server @@ -136,4 +136,4 @@ cleanup(Resource, Cnt0, Pid) -> any(Cnt) -> maps:size(Cnt) > 0. resource(scheduler_wall_time, Enable) -> - _ = erlang:system_flag(scheduler_wall_time, Enable). + _ = erts_internal:scheduler_wall_time(Enable). diff --git a/lib/tools/emacs/erlang.el b/lib/tools/emacs/erlang.el index d9efadf64a..6b93d63182 100644 --- a/lib/tools/emacs/erlang.el +++ b/lib/tools/emacs/erlang.el @@ -885,7 +885,6 @@ resulting regexp is surrounded by \\_< and \\_>." "append" "append_element" "await_proc_exit" - "await_sched_wall_time_modifications" "bump_reductions" "call_on_load_function" "cancel_timer" @@ -923,7 +922,6 @@ resulting regexp is surrounded by \\_< and \\_>." "function_exported" "garbage_collect_message_area" "gather_gc_info_result" - "gather_sched_wall_time_result" "get_cookie" "get_module_info" "get_stacktrace" -- cgit v1.2.1 From af26ced299686400df79d32bf946081355e02aa2 Mon Sep 17 00:00:00 2001 From: Dan Gudmundsson Date: Fri, 15 Dec 2017 12:25:08 +0100 Subject: Turn on scheduler_wall_time in an alive process scheduler_wall_time is ref-counted so it will turn off if process dies, keep the process that turns it on alive. --- lib/runtime_tools/src/observer_backend.erl | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/lib/runtime_tools/src/observer_backend.erl b/lib/runtime_tools/src/observer_backend.erl index 1b075a507d..a1edde8516 100644 --- a/lib/runtime_tools/src/observer_backend.erl +++ b/lib/runtime_tools/src/observer_backend.erl @@ -293,7 +293,7 @@ fetch_stats_loop(Parent, Time) -> erlang:system_flag(scheduler_wall_time, true), receive _Msg -> - %% erlang:system_flag(scheduler_wall_time, false) + erlang:system_flag(scheduler_wall_time, false), ok after Time -> _M = Parent ! {stats, 1, @@ -340,7 +340,6 @@ etop_collect(Collector) -> case SchedulerWallTime of undefined -> - erlang:system_flag(scheduler_wall_time,true), spawn(fun() -> flag_holder_proc(Collector) end), ok; _ -> @@ -348,10 +347,11 @@ etop_collect(Collector) -> end. flag_holder_proc(Collector) -> + erlang:system_flag(scheduler_wall_time,true), Ref = erlang:monitor(process,Collector), receive {'DOWN',Ref,_,_,_} -> - %% erlang:system_flag(scheduler_wall_time,false) + erlang:system_flag(scheduler_wall_time,false), ok end. -- cgit v1.2.1 From 7067db6e361e8f2feadd76dd6df66e5c6c4f8a0e Mon Sep 17 00:00:00 2001 From: Dan Gudmundsson Date: Fri, 15 Dec 2017 14:36:51 +0100 Subject: test: spawn scheduler_wall_time flag holder Can not start via rpc any more without spawning a keep alive process, since it will stop collecting when process dies. --- lib/sasl/test/release_handler_SUITE.erl | 38 ++++++++++++++++++++++----------- 1 file changed, 25 insertions(+), 13 deletions(-) diff --git a/lib/sasl/test/release_handler_SUITE.erl b/lib/sasl/test/release_handler_SUITE.erl index 4935782cf2..824820c214 100644 --- a/lib/sasl/test/release_handler_SUITE.erl +++ b/lib/sasl/test/release_handler_SUITE.erl @@ -22,7 +22,8 @@ -include_lib("common_test/include/ct.hrl"). -include("test_lib.hrl"). --compile(export_all). +-compile([export_all, nowarn_export_all]). +-export([scheduler_wall_time/0, garbage_collect/0]). %% rpc'ed % Default timetrap timeout (set in init_per_testcase). %-define(default_timeout, ?t:minutes(40)). @@ -1085,8 +1086,9 @@ otp_9395_update_many_mods(Conf) when is_list(Conf) -> Rel2Dir = filename:dirname(Rel2), %% Start a slave node + PA = filename:dirname(code:which(?MODULE)), {ok, Node} = t_start_node(otp_9395_update_many_mods, Rel1, - filename:join(Rel1Dir,"sys.config")), + filename:join(Rel1Dir,"sys.config"), "-pa " ++ PA), %% Start a lot of processes on the new node, all with refs to each %% module that will be updated @@ -1109,8 +1111,8 @@ otp_9395_update_many_mods(Conf) when is_list(Conf) -> [RelVsn2, filename:join(Rel2Dir, "sys.config")]), %% First, install release directly and check how much time it takes - rpc:call(Node,erlang,garbage_collect,[]), - rpc:call(Node,erlang,system_flag,[scheduler_wall_time,true]), + rpc:call(Node,?MODULE,garbage_collect,[]), + SWTFlag0 = spawn_link(Node, ?MODULE, scheduler_wall_time, []), {TInst0,{ok, _, []}} = timer:tc(rpc,call,[Node, release_handler, install_release, [RelVsn2]]), SWT0 = rpc:call(Node,erlang,statistics,[scheduler_wall_time]), @@ -1135,9 +1137,9 @@ otp_9395_update_many_mods(Conf) when is_list(Conf) -> %% Finally install release after check and purge, and check that %% this install was faster than the first. - rpc:call(Node,erlang,system_flag,[scheduler_wall_time,false]), - rpc:call(Node,erlang,garbage_collect,[]), - rpc:call(Node,erlang,system_flag,[scheduler_wall_time,true]), + SWTFlag0 ! die, + rpc:call(Node,?MODULE,garbage_collect,[]), + _SWTFlag1 = spawn_link(Node, ?MODULE, scheduler_wall_time, []), {TInst2,{ok, _RelVsn1, []}} = timer:tc(rpc,call,[Node, release_handler, install_release, [RelVsn2]]), SWT2 = rpc:call(Node,erlang,statistics,[scheduler_wall_time]), @@ -1161,6 +1163,15 @@ otp_9395_update_many_mods(Conf) when is_list(Conf) -> ok. +scheduler_wall_time() -> + erlang:system_flag(scheduler_wall_time,true), + receive _Msg -> normal end. + +garbage_collect() -> + Pids = processes(), + [erlang:garbage_collect(Pid) || Pid <- Pids]. + + otp_9395_update_many_mods(cleanup,_Conf) -> stop_node(node_name(otp_9395_update_many_mods)). @@ -1190,8 +1201,9 @@ otp_9395_rm_many_mods(Conf) when is_list(Conf) -> Rel2Dir = filename:dirname(Rel2), %% Start a slave node + PA = filename:dirname(code:which(?MODULE)), {ok, Node} = t_start_node(otp_9395_rm_many_mods, Rel1, - filename:join(Rel1Dir,"sys.config")), + filename:join(Rel1Dir,"sys.config"), "-pa " ++ PA), %% Start a lot of processes on the new node, all with refs to each %% module that will be updated @@ -1214,8 +1226,8 @@ otp_9395_rm_many_mods(Conf) when is_list(Conf) -> [RelVsn2, filename:join(Rel2Dir, "sys.config")]), %% First, install release directly and check how much time it takes - rpc:call(Node,erlang,garbage_collect,[]), - rpc:call(Node,erlang,system_flag,[scheduler_wall_time,true]), + rpc:call(Node,?MODULE,garbage_collect,[]), + SWTFlag0 = spawn_link(Node, ?MODULE, scheduler_wall_time, []), {TInst0,{ok, _, []}} = timer:tc(rpc,call,[Node, release_handler, install_release, [RelVsn2]]), SWT0 = rpc:call(Node,erlang,statistics,[scheduler_wall_time]), @@ -1240,9 +1252,9 @@ otp_9395_rm_many_mods(Conf) when is_list(Conf) -> %% Finally install release after check and purge, and check that %% this install was faster than the first. - rpc:call(Node,erlang,system_flag,[scheduler_wall_time,false]), - rpc:call(Node,erlang,garbage_collect,[]), - rpc:call(Node,erlang,system_flag,[scheduler_wall_time,true]), + SWTFlag0 ! die, + rpc:call(Node,?MODULE,garbage_collect,[]), + _SWTFlag1 = spawn_link(Node, ?MODULE, scheduler_wall_time, []), {TInst2,{ok, _RelVsn1, []}} = timer:tc(rpc,call,[Node, release_handler, install_release, [RelVsn2]]), SWT2 = rpc:call(Node,erlang,statistics,[scheduler_wall_time]), -- cgit v1.2.1