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-rw-r--r--lib/kernel/src/logger_disk_log_h.erl64
-rw-r--r--lib/kernel/src/logger_h_common.erl16
-rw-r--r--lib/kernel/src/logger_h_common.hrl2
-rw-r--r--lib/kernel/src/logger_std_h.erl22
4 files changed, 51 insertions, 53 deletions
diff --git a/lib/kernel/src/logger_disk_log_h.erl b/lib/kernel/src/logger_disk_log_h.erl
index 0150fa781a..57c54ce27e 100644
--- a/lib/kernel/src/logger_disk_log_h.erl
+++ b/lib/kernel/src/logger_disk_log_h.erl
@@ -278,10 +278,11 @@ init([Name, Config = #{disk_log_opts := LogOpts},
last_log_ts => T0,
burst_win_ts => T0,
burst_msg_count => 0,
+ last_op => sync,
prev_log_result => ok,
prev_sync_result => ok,
prev_disk_log_info => undefined}),
- gen_server:cast(self(), {repeated_disk_log_sync,T0}),
+ gen_server:cast(self(), repeated_disk_log_sync),
enter_loop(Config, State1);
Error ->
logger_h_common:error_notify({open_disk_log,Name,Error}),
@@ -316,8 +317,7 @@ handle_call(disk_log_sync, _From, State = #{id := Name}) ->
{reply, Result, State1};
handle_call({change_config,_OldConfig,NewConfig}, _From,
- State = #{filesync_repeat_interval := FSyncInt0,
- last_log_ts := LastLogTS}) ->
+ State = #{filesync_repeat_interval := FSyncInt0}) ->
HConfig = maps:get(?MODULE, NewConfig, #{}),
State1 = #{toggle_sync_qlen := TSQL,
drop_new_reqs_qlen := DNRQL,
@@ -338,9 +338,8 @@ handle_call({change_config,_OldConfig,NewConfig}, _From,
_ = logger_h_common:cancel_timer(maps:get(rep_sync_tref,
State,
undefined)),
- _ = gen_server:cast(self(), {repeated_disk_log_sync,
- LastLogTS})
- end,
+ _ = gen_server:cast(self(), repeated_disk_log_sync)
+ end,
{reply, ok, State1};
false ->
{reply, {error,{invalid_levels,{TSQL,DNRQL,FRQL}}}, State}
@@ -370,24 +369,23 @@ handle_cast({log, Bin}, State) ->
%% clause gets called repeatedly by the handler. In order to
%% guarantee that a filesync *always* happens after the last log
%% request, the repeat operation must be active!
-handle_cast({repeated_disk_log_sync,LastLogTS0},
+handle_cast(repeated_disk_log_sync,
State = #{id := Name,
filesync_repeat_interval := FSyncInt,
- last_log_ts := LastLogTS1}) ->
+ last_op := LastOp}) ->
State1 =
if is_integer(FSyncInt) ->
%% only do filesync if something has been
%% written since last time we checked
- NewState = if LastLogTS1 == LastLogTS0 ->
+ NewState = if LastOp == sync ->
State;
true ->
disk_log_sync(Name, State)
end,
{ok,TRef} =
timer:apply_after(FSyncInt, gen_server,cast,
- [self(),
- {repeated_disk_log_sync,LastLogTS1}]),
- NewState#{rep_sync_tref => TRef};
+ [self(),repeated_disk_log_sync]),
+ NewState#{rep_sync_tref => TRef, last_op => sync};
true ->
State
end,
@@ -649,10 +647,9 @@ close_disk_log(Name, _) ->
ok.
disk_log_write(Name, Bin, State) ->
- Result =
case ?disk_log_blog(Name, Bin) of
ok ->
- ok;
+ State#{prev_log_result => ok, last_op => write};
LogError ->
_ = case maps:get(prev_log_result, State) of
LogError ->
@@ -664,29 +661,26 @@ disk_log_write(Name, Bin, State) ->
LogOpts,
LogError})
end,
- LogError
- end,
- State#{prev_log_result => Result}.
+ State#{prev_log_result => LogError}
+ end.
disk_log_sync(Name, State) ->
- Result =
- case ?disk_log_sync(Name) of
- ok ->
- ok;
- SyncError ->
- _ = case maps:get(prev_sync_result, State) of
- SyncError ->
- %% don't report same error twice
- ok;
- _ ->
- LogOpts = maps:get(log_opts, State),
- logger_h_common:error_notify({Name,sync,
- LogOpts,
- SyncError})
- end,
- SyncError
- end,
- State#{prev_sync_result => Result}.
+ case ?disk_log_sync(Name) of
+ ok ->
+ State#{prev_sync_result => ok, last_op => sync};
+ SyncError ->
+ _ = case maps:get(prev_sync_result, State) of
+ SyncError ->
+ %% don't report same error twice
+ ok;
+ _ ->
+ LogOpts = maps:get(log_opts, State),
+ logger_h_common:error_notify({Name,sync,
+ LogOpts,
+ SyncError})
+ end,
+ State#{prev_sync_result => SyncError}
+ end.
error_notify_new(Info,Info, _Term) ->
ok;
diff --git a/lib/kernel/src/logger_h_common.erl b/lib/kernel/src/logger_h_common.erl
index 7caad366ae..901c4c0dad 100644
--- a/lib/kernel/src/logger_h_common.erl
+++ b/lib/kernel/src/logger_h_common.erl
@@ -135,7 +135,8 @@ call_cast_or_drop(Name, Bin) ->
_:{timeout,_} ->
?observe(Name,{dropped,1})
end;
- drop -> ?observe(Name,{dropped,1})
+ drop ->
+ ?observe(Name,{dropped,1})
catch
%% if the ETS table doesn't exist (maybe because of a
%% handler restart), we can only drop the request
@@ -152,12 +153,15 @@ check_load(State = #{id:=Name, mode := Mode,
flush_reqs_qlen := FlushQLen}) ->
{_,Mem} = process_info(self(), memory),
?observe(Name,{max_mem,Mem}),
- %% make sure the handler process doesn't get scheduled
- %% out between the message_queue_len check below and the
- %% action that follows (flush or write).
{_,QLen} = process_info(self(), message_queue_len),
?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),
+ %% 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.
{Mode1,_NewDrops,_NewFlushes} =
if
QLen >= FlushQLen ->
@@ -292,7 +296,7 @@ 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),
- (TSQL < DNRQL) andalso (DNRQL < FRQL).
+ (DNRQL > 1) andalso (TSQL =< DNRQL) andalso (DNRQL =< FRQL).
error_notify(Term) ->
?internal_log(error, Term).
diff --git a/lib/kernel/src/logger_h_common.hrl b/lib/kernel/src/logger_h_common.hrl
index 89378dbb10..ed365ce6eb 100644
--- a/lib/kernel/src/logger_h_common.hrl
+++ b/lib/kernel/src/logger_h_common.hrl
@@ -124,7 +124,7 @@
%%% slow down execution and therefore should not be include in code
%%% to be officially released.
-%% -define(TEST_HOOKS, true).
+-define(TEST_HOOKS, true).
-ifdef(TEST_HOOKS).
-define(TEST_HOOKS_TAB, logger_h_test_hooks).
diff --git a/lib/kernel/src/logger_std_h.erl b/lib/kernel/src/logger_std_h.erl
index 31edcfea8b..e5e0febc88 100644
--- a/lib/kernel/src/logger_std_h.erl
+++ b/lib/kernel/src/logger_std_h.erl
@@ -257,10 +257,11 @@ init([Name, Config,
file_ctrl_sync => FileCtrlSyncInt,
last_qlen => 0,
last_log_ts => T0,
+ last_op => sync,
burst_win_ts => T0,
burst_msg_count => 0}),
proc_lib:init_ack({ok,self()}),
- gen_server:cast(self(), {repeated_filesync,T0}),
+ gen_server:cast(self(), repeated_filesync),
enter_loop(Config, State1);
Error ->
logger_h_common:error_notify({init_handler,Name,Error}),
@@ -310,12 +311,11 @@ handle_call(filesync, _From, State = #{type := Type,
if is_atom(Type) ->
{reply, ok, State};
true ->
- {reply, file_ctrl_filesync_sync(FileCtrlPid), State}
+ {reply, file_ctrl_filesync_sync(FileCtrlPid), State#{last_op=>sync}}
end;
handle_call({change_config,_OldConfig,NewConfig}, _From,
- State = #{filesync_repeat_interval := FSyncInt0,
- last_log_ts := LastLogTS}) ->
+ State = #{filesync_repeat_interval := FSyncInt0}) ->
HConfig = maps:get(?MODULE, NewConfig, #{}),
State1 = maps:merge(State, HConfig),
case logger_h_common:overload_levels_ok(State1) of
@@ -334,8 +334,7 @@ handle_call({change_config,_OldConfig,NewConfig}, _From,
_ = logger_h_common:cancel_timer(maps:get(rep_sync_tref,
State,
undefined)),
- gen_server:cast(self(), {repeated_filesync,
- LastLogTS})
+ gen_server:cast(self(), repeated_filesync)
end,
{reply, ok, State1};
false ->
@@ -365,24 +364,24 @@ handle_cast({log, Bin}, State) ->
%% clause gets called repeatedly by the handler. In order to
%% guarantee that a filesync *always* happens after the last log
%% request, the repeat operation must be active!
-handle_cast({repeated_filesync,LastLogTS0},
+handle_cast(repeated_filesync,
State = #{type := Type,
file_ctrl_pid := FileCtrlPid,
filesync_repeat_interval := FSyncInt,
- last_log_ts := LastLogTS1}) ->
+ last_op := LastOp}) ->
State1 =
if not is_atom(Type), is_integer(FSyncInt) ->
%% only do filesync if something has been
%% written since last time we checked
- if LastLogTS1 == LastLogTS0 ->
+ if LastOp == sync ->
ok;
true ->
file_ctrl_filesync_async(FileCtrlPid)
end,
{ok,TRef} =
timer:apply_after(FSyncInt, gen_server,cast,
- [self(),{repeated_filesync,LastLogTS1}]),
- State#{rep_sync_tref => TRef};
+ [self(),repeated_filesync]),
+ State#{rep_sync_tref => TRef, last_op => sync};
true ->
State
end,
@@ -600,6 +599,7 @@ write(Name, Mode, T1, Bin, _CallOrCast,
State1#{mode => Mode1,
last_qlen := LastQLen1,
last_log_ts => T1,
+ last_op => write,
burst_win_ts => BurstWinT,
burst_msg_count => BurstMsgCount1,
file_ctrl_sync =>
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-15 20:52:10 +0000