diff options
Diffstat (limited to 'lib/kernel/src/logger_h_common.erl')
| -rw-r--r-- | lib/kernel/src/logger_h_common.erl | 169 |
1 files changed, 101 insertions, 68 deletions
diff --git a/lib/kernel/src/logger_h_common.erl b/lib/kernel/src/logger_h_common.erl index 336398cd4a..a40345dddc 100644 --- a/lib/kernel/src/logger_h_common.erl +++ b/lib/kernel/src/logger_h_common.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2017. All Rights Reserved. +%% Copyright Ericsson AB 2017-2018. 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. @@ -24,13 +24,15 @@ -export([log_to_binary/2, check_common_config/1, - call_cast_or_drop/2, + call_cast_or_drop/4, check_load/1, limit_burst/1, - kill_if_choked/4, - flush_log_requests/0, - flush_log_requests/1, + kill_if_choked/5, + flush_log_events/0, + flush_log_events/1, handler_exit/2, + set_restart_flag/2, + unset_restart_flag/2, cancel_timer/1, stop_or_restart/3, overload_levels_ok/1, @@ -41,7 +43,7 @@ %%% Covert log data on any form to binary -spec log_to_binary(LogEvent,Config) -> LogString when LogEvent :: logger:log_event(), - Config :: logger:config(), + Config :: logger:handler_config(), LogString :: binary(). log_to_binary(#{msg:={report,_},meta:=#{report_cb:=_}}=Log,Config) -> do_log_to_binary(Log,Config); @@ -52,7 +54,8 @@ log_to_binary(Log,Config) -> do_log_to_binary(Log,Config). do_log_to_binary(Log,Config) -> - {Formatter,FormatterConfig} = maps:get(formatter,Config), + {Formatter,FormatterConfig} = + maps:get(formatter,Config,{?DEFAULT_FORMATTER,?DEFAULT_FORMAT_CONFIG}), String = try_format(Log,Formatter,FormatterConfig), try unicode:characters_to_binary(String) catch _:_ -> @@ -84,29 +87,37 @@ try_format(Log,Formatter,FormatterConfig) -> %%%----------------------------------------------------------------- %%% Check that the configuration term is valid -check_common_config({toggle_sync_qlen,N}) when is_integer(N) -> +check_common_config({mode_tab,_Tid}) -> valid; -check_common_config({drop_new_reqs_qlen,N}) when is_integer(N) -> +check_common_config({handler_pid,Pid}) when is_pid(Pid) -> valid; -check_common_config({flush_reqs_qlen,N}) when is_integer(N) -> + +check_common_config({sync_mode_qlen,N}) when is_integer(N) -> + valid; +check_common_config({drop_mode_qlen,N}) when is_integer(N) -> + valid; +check_common_config({flush_qlen,N}) when is_integer(N) -> valid; -check_common_config({enable_burst_limit,Bool}) when Bool == true; + +check_common_config({burst_limit_enable,Bool}) when Bool == true; Bool == false -> valid; -check_common_config({burst_limit_size,N}) when is_integer(N) -> +check_common_config({burst_limit_max_count,N}) when is_integer(N) -> valid; -check_common_config({burst_window_time,N}) when is_integer(N) -> +check_common_config({burst_limit_window_time,N}) when is_integer(N) -> valid; -check_common_config({enable_kill_overloaded,Bool}) when Bool == true; - Bool == false -> + +check_common_config({overload_kill_enable,Bool}) when Bool == true; + Bool == false -> valid; -check_common_config({handler_overloaded_qlen,N}) when is_integer(N) -> +check_common_config({overload_kill_qlen,N}) when is_integer(N) -> valid; -check_common_config({handler_overloaded_mem,N}) when is_integer(N) -> +check_common_config({overload_kill_mem_size,N}) when is_integer(N) -> valid; -check_common_config({handler_restart_after,NorA}) when is_integer(NorA); - NorA == never -> +check_common_config({overload_kill_restart_after,NorA}) when is_integer(NorA); + NorA == infinity -> valid; + check_common_config({filesync_repeat_interval,NorA}) when is_integer(NorA); NorA == no_repeat -> valid; @@ -116,16 +127,16 @@ check_common_config(_) -> %%%----------------------------------------------------------------- %%% Overload Protection -call_cast_or_drop(Name, Bin) -> - %% If the handler process is getting overloaded, the log request +call_cast_or_drop(_Name, HandlerPid, ModeTab, Bin) -> + %% If the handler process is getting overloaded, the log event %% will be synchronous instead of asynchronous (slows down the %% logging tempo of a process doing lots of logging. If the - %% handler is choked, drop mode is set and no request will be sent. - try ?get_mode(Name) of + %% handler is choked, drop mode is set and no event will be sent. + try ?get_mode(ModeTab) of async -> - gen_server:cast(Name, {log,Bin}); + gen_server:cast(HandlerPid, {log,Bin}); sync -> - try gen_server:call(Name, {log,Bin}, ?DEFAULT_CALL_TIMEOUT) of + try gen_server:call(HandlerPid, {log,Bin}, ?DEFAULT_CALL_TIMEOUT) of %% if return value from call == dropped, the %% message has been flushed by handler and should %% therefore not be counted as dropped in stats @@ -133,32 +144,50 @@ call_cast_or_drop(Name, Bin) -> dropped -> ok catch _:{timeout,_} -> - ?observe(Name,{dropped,1}) + ?observe(_Name,{dropped,1}) end; drop -> - ?observe(Name,{dropped,1}) + ?observe(_Name,{dropped,1}) catch %% if the ETS table doesn't exist (maybe because of a - %% handler restart), we can only drop the request - _:_ -> ?observe(Name,{dropped,1}) + %% handler restart), we can only drop the event + _:_ -> ?observe(_Name,{dropped,1}) end, ok. handler_exit(_Name, Reason) -> exit(Reason). -check_load(State = #{id:=Name, mode := Mode, - toggle_sync_qlen := ToggleSyncQLen, - drop_new_reqs_qlen := DropNewQLen, - flush_reqs_qlen := FlushQLen}) -> +set_restart_flag(Name, Module) -> + Flag = list_to_atom(lists:concat([Module,"_",Name,"_restarting"])), + spawn(fun() -> + register(Flag, self()), + timer:sleep(infinity) + end), + ok. + +unset_restart_flag(Name, Module) -> + Flag = list_to_atom(lists:concat([Module,"_",Name,"_restarting"])), + case whereis(Flag) of + undefined -> + false; + Pid -> + exit(Pid, kill), + true + end. + +check_load(State = #{id:=_Name, mode_tab := ModeTab, mode := Mode, + sync_mode_qlen := SyncModeQLen, + drop_mode_qlen := DropModeQLen, + flush_qlen := FlushQLen}) -> {_,Mem} = process_info(self(), memory), - ?observe(Name,{max_mem,Mem}), + ?observe(_Name,{max_mem,Mem}), {_,QLen} = process_info(self(), message_queue_len), - ?observe(Name,{max_qlen,QLen}), + ?observe(_Name,{max_qlen,QLen}), %% When the handler process gets scheduled in, it's impossible %% to predict the QLen. We could jump "up" arbitrarily from say %% async to sync, async to drop, sync to flush, etc. However, when - %% the handler process manages the log requests (without flushing), + %% the handler process manages the log events (without flushing), %% one after the other, we will move "down" from drop to sync and %% from sync to async. This way we don't risk getting stuck in %% drop or sync mode with an empty mailbox. @@ -166,33 +195,33 @@ check_load(State = #{id:=Name, mode := Mode, if QLen >= FlushQLen -> {flush, 0,1}; - QLen >= DropNewQLen -> - %% Note that drop mode will force log requests to + QLen >= DropModeQLen -> + %% Note that drop mode will force log events to %% be dropped on the client side (never sent get to %% the handler). IncDrops = if Mode == drop -> 0; true -> 1 end, - {?change_mode(Name, Mode, drop), IncDrops,0}; - QLen >= ToggleSyncQLen -> - {?change_mode(Name, Mode, sync), 0,0}; + {?change_mode(ModeTab, Mode, drop), IncDrops,0}; + QLen >= SyncModeQLen -> + {?change_mode(ModeTab, Mode, sync), 0,0}; true -> - {?change_mode(Name, Mode, async), 0,0} + {?change_mode(ModeTab, Mode, async), 0,0} end, State1 = ?update_other(drops,DROPS,_NewDrops,State), {Mode1, QLen, Mem, ?update_other(flushes,FLUSHES,_NewFlushes, State1#{last_qlen => QLen})}. -limit_burst(#{enable_burst_limit := false}) -> +limit_burst(#{burst_limit_enable := false}) -> {true,0,0}; limit_burst(#{burst_win_ts := BurstWinT0, burst_msg_count := BurstMsgCount, - burst_window_time := BurstWinTime, - burst_limit_size := BurstLimitSz}) -> - if (BurstMsgCount >= BurstLimitSz) -> + burst_limit_window_time := BurstLimitWinTime, + burst_limit_max_count := BurstLimitMaxCnt}) -> + if (BurstMsgCount >= BurstLimitMaxCnt) -> %% the limit for allowed messages has been reached BurstWinT1 = ?timestamp(), case ?diff_time(BurstWinT1,BurstWinT0) of - BurstCheckTime when BurstCheckTime < (BurstWinTime*1000) -> + BurstCheckTime when BurstCheckTime < (BurstLimitWinTime*1000) -> %% we're still within the burst time frame {false,BurstWinT0,BurstMsgCount}; _BurstCheckTime -> @@ -204,38 +233,42 @@ limit_burst(#{burst_win_ts := BurstWinT0, {true,BurstWinT0,BurstMsgCount+1} end. -kill_if_choked(Name, QLen, Mem, - #{enable_kill_overloaded := KillIfOL, - handler_overloaded_qlen := HOLQLen, - handler_overloaded_mem := HOLMem}) -> +kill_if_choked(Name, QLen, Mem, HandlerMod, + State = #{overload_kill_enable := KillIfOL, + overload_kill_qlen := OLKillQLen, + overload_kill_mem_size := OLKillMem}) -> if KillIfOL andalso - ((QLen > HOLQLen) orelse (Mem > HOLMem)) -> + ((QLen > OLKillQLen) orelse (Mem > OLKillMem)) -> + HandlerMod:log_handler_info(Name, + "Handler ~p overloaded and stopping", + [Name], State), + set_restart_flag(Name, HandlerMod), handler_exit(Name, {shutdown,{overloaded,Name,QLen,Mem}}); true -> ok end. -flush_log_requests() -> - flush_log_requests(-1). +flush_log_events() -> + flush_log_events(-1). -flush_log_requests(Limit) -> +flush_log_events(Limit) -> process_flag(priority, high), - Flushed = flush_log_requests(0, Limit), + Flushed = flush_log_events(0, Limit), process_flag(priority, normal), Flushed. -flush_log_requests(Limit, Limit) -> +flush_log_events(Limit, Limit) -> Limit; -flush_log_requests(N, Limit) -> - %% flush log requests but leave other requests, such as - %% file/disk_log_sync, info and change_config, so that these +flush_log_events(N, Limit) -> + %% flush log events but leave other events, such as + %% filesync, info and change_config, so that these %% have a chance to be processed even under heavy load receive {'$gen_cast',{log,_}} -> - flush_log_requests(N+1, Limit); + flush_log_events(N+1, Limit); {'$gen_call',{Pid,MRef},{log,_}} -> Pid ! {MRef, dropped}, - flush_log_requests(N+1, Limit) + flush_log_events(N+1, Limit) after 0 -> N end. @@ -245,7 +278,7 @@ cancel_timer(TRef) -> timer:cancel(TRef). stop_or_restart(Name, {shutdown,Reason={overloaded,_Name,_QLen,_Mem}}, - #{handler_restart_after := RestartAfter}) -> + #{overload_kill_restart_after := RestartAfter}) -> %% If we're terminating because of an overload situation (see %% logger_h_common:kill_if_choked/4), we need to remove the handler %% and set a restart timer. A separate process must perform this @@ -262,7 +295,7 @@ stop_or_restart(Name, {shutdown,Reason={overloaded,_Name,_QLen,_Mem}}, exit(HandlerPid, kill) end, case logger:get_handler_config(Name) of - {ok,{HMod,HConfig}} when is_integer(RestartAfter) -> + {ok,#{module:=HMod}=HConfig} when is_integer(RestartAfter) -> _ = logger:remove_handler(Name), _ = timer:apply_after(RestartAfter, logger, add_handler, [Name,HMod,HConfig]); @@ -293,10 +326,10 @@ stop_or_restart(_Name, _Reason, _State) -> ok. overload_levels_ok(HandlerConfig) -> - TSQL = maps:get(toggle_sync_qlen, HandlerConfig, ?TOGGLE_SYNC_QLEN), - DNRQL = maps:get(drop_new_reqs_qlen, HandlerConfig, ?DROP_NEW_REQS_QLEN), - FRQL = maps:get(flush_reqs_qlen, HandlerConfig, ?FLUSH_REQS_QLEN), - (DNRQL > 1) andalso (TSQL =< DNRQL) andalso (DNRQL =< FRQL). + SMQL = maps:get(sync_mode_qlen, HandlerConfig, ?SYNC_MODE_QLEN), + DMQL = maps:get(drop_mode_qlen, HandlerConfig, ?DROP_MODE_QLEN), + FQL = maps:get(flush_qlen, HandlerConfig, ?FLUSH_QLEN), + (DMQL > 1) andalso (SMQL =< DMQL) andalso (DMQL =< FQL). error_notify(Term) -> ?internal_log(error, Term). |