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https://github.com/processone/ejabberd.git
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Implemented dirty (non-atomic) functions; added copyright notice
This commit is contained in:
Evgeniy Khramtsov
parent
c754c91ad1
commit
c75b7b2b12
@ -4,6 +4,25 @@
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%%% Description : Caching key-value table
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%%%
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%%% Created : 29 Aug 2010 by Evgeniy Khramtsov <ekhramtsov@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2010 ProcessOne
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%%%
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%%% This program is free software; you can redistribute it and/or
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%%% modify it under the terms of the GNU General Public License as
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%%% published by the Free Software Foundation; either version 2 of the
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%%% License, or (at your option) any later version.
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%%%
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%%% This program is distributed in the hope that it will be useful,
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%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
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%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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%%% General Public License for more details.
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%%%
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%%% You should have received a copy of the GNU General Public License
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%%% along with this program; if not, write to the Free Software
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%%% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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%%% 02111-1307 USA
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%%%
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%%%-------------------------------------------------------------------
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-module(cache_tab).
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@ -13,7 +32,9 @@
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%% API
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-export([start_link/4, new/2, delete/1, delete/3, lookup/3,
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insert/4, info/2, tab2list/1, setopts/2, all/0, test/0]).
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insert/4, info/2, tab2list/1, setopts/2,
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dirty_lookup/3, dirty_insert/4, dirty_delete/3,
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all/0, test/0]).
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%% gen_server callbacks
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-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
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@ -85,14 +106,42 @@ delete(Tab, Key, F) ->
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?GEN_SERVER:call(
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get_proc_by_hash(Tab, Key), {delete, Key, F}, ?CALL_TIMEOUT).
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dirty_delete(Tab, Key, F) ->
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F(),
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?GEN_SERVER:call(
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get_proc_by_hash(Tab, Key), {dirty_delete, Key}, ?CALL_TIMEOUT).
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lookup(Tab, Key, F) ->
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?GEN_SERVER:call(
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get_proc_by_hash(Tab, Key), {lookup, Key, F}, ?CALL_TIMEOUT).
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dirty_lookup(Tab, Key, F) ->
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Proc = get_proc_by_hash(Tab, Key),
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case ?GEN_SERVER:call(Proc, {dirty_lookup, Key}, ?CALL_TIMEOUT) of
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{ok, '$cached_mismatch'} ->
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error;
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{ok, Val} ->
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{ok, Val};
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_ ->
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case F() of
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{ok, Val} ->
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?GEN_SERVER:call(
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Proc, {dirty_insert, Key, Val}, ?CALL_TIMEOUT),
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{ok, Val};
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_ ->
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error
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end
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end.
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insert(Tab, Key, Val, F) ->
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?GEN_SERVER:call(
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get_proc_by_hash(Tab, Key), {insert, Key, Val, F}, ?CALL_TIMEOUT).
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dirty_insert(Tab, Key, Val, F) ->
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F(),
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?GEN_SERVER:call(
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get_proc_by_hash(Tab, Key), {dirty_insert, Key, Val}, ?CALL_TIMEOUT).
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info(Tab, Info) ->
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case lists:map(
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fun(Proc) ->
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@ -168,6 +217,22 @@ handle_call({lookup, Key, F}, _From, #state{tab = T} = State) ->
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end
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end
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end;
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handle_call({dirty_lookup, Key}, _From, #state{tab = T} = State) ->
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case treap:lookup(Key, T) of
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{ok, _Prio, Val} ->
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Hits = State#state.hits,
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NewState = treap_update(Key, Val, State#state{hits = Hits + 1}),
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{reply, {ok, Val}, NewState};
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_ ->
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Miss = State#state.miss,
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NewState = State#state{miss = Miss + 1},
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if State#state.cache_missed ->
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{reply, error,
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treap_insert(Key, '$cached_mismatch', NewState)};
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true ->
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{reply, error, NewState}
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end
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end;
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handle_call({insert, Key, Val, F}, _From, #state{tab = T} = State) ->
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case treap:lookup(Key, T) of
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{ok, _Prio, Val} ->
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@ -187,6 +252,15 @@ handle_call({insert, Key, Val, F}, _From, #state{tab = T} = State) ->
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{reply, ok, NewState}
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end
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end;
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handle_call({dirty_insert, Key, Val}, _From, #state{tab = T} = State) ->
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case treap:lookup(Key, T) of
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{ok, _Prio, Val} ->
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{reply, ok, State};
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{ok, _, _} ->
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{reply, ok, treap_update(Key, Val, State)};
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_ ->
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{reply, ok, treap_insert(Key, Val, State)}
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end;
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handle_call({delete, Key, F}, _From, State) ->
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NewState = treap_delete(Key, State),
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case catch F() of
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@ -196,6 +270,9 @@ handle_call({delete, Key, F}, _From, State) ->
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ok
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end,
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{reply, ok, NewState};
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handle_call({dirty_delete, Key}, _From, State) ->
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NewState = treap_delete(Key, State),
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{reply, ok, NewState};
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handle_call({info, Info}, _From, State) ->
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Res = case Info of
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size ->
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@ -412,23 +489,30 @@ print_error(Operation, Args, Reason, State) ->
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%%--------------------------------------------------------------------
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%%% Tests
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%%--------------------------------------------------------------------
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-define(lookup, dirty_lookup).
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-define(delete, dirty_delete).
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-define(insert, dirty_insert).
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%% -define(lookup, lookup).
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%% -define(delete, delete).
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%% -define(insert, insert).
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test() ->
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LifeTime = 2,
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ok = new(test_tbl, [{life_time, LifeTime}, {max_size, unlimited}]),
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check([]),
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ok = insert(test_tbl, "key", "value", fun() -> ok end),
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ok = ?insert(test_tbl, "key", "value", fun() -> ok end),
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check([{"key", "value"}]),
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{ok, "value"} = lookup(test_tbl, "key", fun() -> error end),
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{ok, "value"} = ?lookup(test_tbl, "key", fun() -> error end),
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check([{"key", "value"}]),
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io:format("** waiting for ~p seconds to check if cleaner works fine...~n",
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[LifeTime+1]),
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timer:sleep(timer:seconds(LifeTime+1)),
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ok = insert(test_tbl, "key1", "value1", fun() -> ok end),
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ok = ?insert(test_tbl, "key1", "value1", fun() -> ok end),
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check([{"key1", "value1"}]),
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ok = delete(test_tbl, "key1", fun() -> ok end),
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{ok, "value"} = lookup(test_tbl, "key", fun() -> {ok, "value"} end),
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ok = ?delete(test_tbl, "key1", fun() -> ok end),
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{ok, "value"} = ?lookup(test_tbl, "key", fun() -> {ok, "value"} end),
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check([{"key", "value"}]),
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ok = delete(test_tbl, "key", fun() -> ok end),
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ok = ?delete(test_tbl, "key", fun() -> ok end),
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check([]),
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%% io:format("** testing buggy callbacks...~n"),
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%% delete(test_tbl, "key", fun() -> erlang:error(badarg) end),
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@ -443,36 +527,35 @@ test1() ->
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ok = new(test_tbl, [{max_size, MaxSize}, {shrink_size, 1}, {warn, false}]),
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lists:foreach(
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fun(N) ->
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ok = insert(test_tbl, N, N, fun() -> ok end)
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ok = ?insert(test_tbl, N, N, fun() -> ok end)
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end, lists:seq(1, MaxSize*get_proc_num())),
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{ok, MaxSize} = info(test_tbl, size),
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delete(test_tbl),
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success.
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%% io:format("** testing speed, this may take a while...~n"),
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%% test2(1000),
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%% test2(10000),
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%% test2(100000),
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%% test2(1000000).
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io:format("** testing speed, this may take a while...~n"),
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test2(1000),
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test2(10000),
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test2(100000),
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test2(1000000).
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%% test2(Iter) ->
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%% ok = new(test_tbl, [{max_size, unlimited}, {life_time, unlimited}]),
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%% L = lists:seq(1, Iter),
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%% T1 = now(),
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%% lists:foreach(
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%% fun(N) ->
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%% ok = insert(test_tbl, N, N, fun() -> ok end)
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%% end, L),
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%% io:format("** average insert (size = ~p): ~p usec~n",
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%% [Iter, round(timer:now_diff(now(), T1)/Iter)]),
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%% T2 = now(),
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%% lists:foreach(
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%% fun(N) ->
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%% {ok, N} = lookup(test_tbl, N, fun() -> ok end)
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%% end, L),
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%% io:format("** average lookup (size = ~p): ~p usec~n",
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%% [Iter, round(timer:now_diff(now(), T2)/Iter)]),
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%% {ok, Iter} = info(test_tbl, size),
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%% delete(test_tbl).
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test2(Iter) ->
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ok = new(test_tbl, [{max_size, unlimited}, {life_time, unlimited}]),
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L = lists:seq(1, Iter),
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T1 = now(),
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lists:foreach(
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fun(N) ->
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ok = ?insert(test_tbl, N, N, fun() -> ok end)
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end, L),
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io:format("** average insert (size = ~p): ~p usec~n",
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[Iter, round(timer:now_diff(now(), T1)/Iter)]),
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T2 = now(),
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lists:foreach(
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fun(N) ->
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{ok, N} = ?lookup(test_tbl, N, fun() -> ok end)
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end, L),
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io:format("** average lookup (size = ~p): ~p usec~n",
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[Iter, round(timer:now_diff(now(), T2)/Iter)]),
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{ok, Iter} = info(test_tbl, size),
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delete(test_tbl).
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check(List) ->
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Size = length(List),
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@ -1,9 +1,28 @@
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%%%-------------------------------------------------------------------
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%%% File : cache_tab_sup.erl
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%%% Author : Evgeniy Khramtsov <ekhramtsov@process-one.net>
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%%% Description :
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%%% Description : Cache tables supervisor
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%%%
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%%% Created : 30 Aug 2010 by Evgeniy Khramtsov <ekhramtsov@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2010 ProcessOne
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%%%
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%%% This program is free software; you can redistribute it and/or
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%%% modify it under the terms of the GNU General Public License as
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%%% published by the Free Software Foundation; either version 2 of the
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%%% License, or (at your option) any later version.
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%%%
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%%% This program is distributed in the hope that it will be useful,
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%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
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%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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%%% General Public License for more details.
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%%%
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%%% You should have received a copy of the GNU General Public License
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%%% along with this program; if not, write to the Free Software
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%%% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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%%% 02111-1307 USA
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%%%
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%%%-------------------------------------------------------------------
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-module(cache_tab_sup).
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