From 3131a94b5d2ce2b95aa0efb99c767e3658f24550 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= Date: Fri, 11 Dec 2015 16:25:34 +0100 Subject: Remove the code path cache in the code server In practice, it does not seem that code path cache can improve performance. Looking for any file that is not found will cause the cache to be rebuilt, which will negate any gain of using the cache. --- lib/kernel/test/code_SUITE.erl | 172 +---------------------------------------- 1 file changed, 4 insertions(+), 168 deletions(-) (limited to 'lib/kernel/test/code_SUITE.erl') diff --git a/lib/kernel/test/code_SUITE.erl b/lib/kernel/test/code_SUITE.erl index ef5303defd..dfcb20d594 100644 --- a/lib/kernel/test/code_SUITE.erl +++ b/lib/kernel/test/code_SUITE.erl @@ -30,8 +30,7 @@ upgrade/1, sticky_dir/1, pa_pz_option/1, add_del_path/1, dir_disappeared/1, ext_mod_dep/1, clash/1, - load_cached/1, start_node_with_cache/1, add_and_rehash/1, - where_is_file_cached/1, where_is_file_no_cache/1, + where_is_file/1, purge_stacktrace/1, mult_lib_roots/1, bad_erl_libs/1, code_archive/1, code_archive2/1, on_load/1, on_load_binary/1, on_load_embedded/1, on_load_errors/1, big_boot_embedded/1, @@ -56,9 +55,8 @@ all() -> load_binary, dir_req, object_code, set_path_file, upgrade, sticky_dir, pa_pz_option, add_del_path, dir_disappeared, - ext_mod_dep, clash, load_cached, start_node_with_cache, - add_and_rehash, where_is_file_no_cache, - where_is_file_cached, purge_stacktrace, mult_lib_roots, + ext_mod_dep, clash, where_is_file, + purge_stacktrace, mult_lib_roots, bad_erl_libs, code_archive, code_archive2, on_load, on_load_binary, on_load_embedded, on_load_errors, big_boot_embedded, native_early_modules, get_mode]. @@ -904,140 +902,7 @@ uniq([H|T],A) -> uniq(T,[H|A]). -load_cached(suite) -> - []; -load_cached(doc) -> - []; -load_cached(Config) when is_list(Config) -> - Priv = ?config(priv_dir, Config), - WD = filename:dirname(code:which(?MODULE)), - {ok,Node} = - ?t:start_node(code_cache_node, peer, [{args, - "-pa \"" ++ WD ++ "\""}, - {erl, [this]}]), - CCTabCreated = fun(Tab) -> - case ets:info(Tab, name) of - code_cache -> true; - _ -> false - end - end, - Tabs = rpc:call(Node, ets, all, []), - case rpc:call(Node, lists, any, [CCTabCreated,Tabs]) of - true -> - ?t:stop_node(Node), - ?t:fail("Code cache should not be active!"); - false -> - ok - end, - rpc:call(Node, code, del_path, [Priv]), - rpc:call(Node, code, add_pathz, [Priv]), - - FullModName = Priv ++ "/code_cache_test", - {ok,Dev} = file:open(FullModName ++ ".erl", [write]), - io:format(Dev, "-module(code_cache_test). -export([a/0]). a() -> ok.~n", []), - ok = file:close(Dev), - {ok,code_cache_test} = compile:file(FullModName, [{outdir,Priv}]), - - F = fun load_loop/2, - N = 1000, - {T0,T1} = rpc:call(Node, erlang, apply, [F, [N,code_cache_test]]), - TNoCache = now_diff(T1, T0), - rpc:call(Node, code, rehash, []), - {T2,T3} = rpc:call(Node, erlang, apply, [F, [N,code_cache_test]]), - TCache = now_diff(T3, T2), - AvgNoCache = TNoCache/N, - AvgCache = TCache/N, - io:format("Avg. load time (no_cache/cache): ~w/~w~n", [AvgNoCache,AvgCache]), - ?t:stop_node(Node), - if AvgNoCache =< AvgCache -> - ?t:fail("Cache not working properly."); - true -> - ok - end. - -load_loop(N, M) -> - load_loop(N, M, now()). -load_loop(0, _M, T0) -> - {T0,now()}; -load_loop(N, M, T0) -> - code:load_file(M), - code:delete(M), - code:purge(M), - load_loop(N-1, M, T0). - -now_diff({A2, B2, C2}, {A1, B1, C1}) -> - ((A2-A1)*1000000 + B2-B1)*1000000 + C2-C1. - -start_node_with_cache(suite) -> - []; -start_node_with_cache(doc) -> - []; -start_node_with_cache(Config) when is_list(Config) -> - {ok,Node} = - ?t:start_node(code_cache_node, peer, [{args, - "-code_path_cache"}, - {erl, [this]}]), - Tabs = rpc:call(Node, ets, all, []), - io:format("Tabs: ~w~n", [Tabs]), - CCTabCreated = fun(Tab) -> - case rpc:call(Node, ets, info, [Tab,name]) of - code_cache -> true; - _ -> false - end - end, - true = lists:any(CCTabCreated, Tabs), - ?t:stop_node(Node), - ok. - -add_and_rehash(suite) -> - []; -add_and_rehash(doc) -> - []; -add_and_rehash(Config) when is_list(Config) -> - Priv = ?config(priv_dir, Config), - WD = filename:dirname(code:which(?MODULE)), - {ok,Node} = - ?t:start_node(code_cache_node, peer, [{args, - "-pa \"" ++ WD ++ "\""}, - {erl, [this]}]), - CCTabCreated = fun(Tab) -> - case ets:info(Tab, name) of - code_cache -> true; - _ -> false - end - end, - Tabs0 = rpc:call(Node, ets, all, []), - case rpc:call(Node, lists, any, [CCTabCreated,Tabs0]) of - true -> - ?t:stop_node(Node), - ?t:fail("Code cache should not be active!"); - false -> - ok - end, - ok = rpc:call(Node, code, rehash, []), % create cache - Tabs1 = rpc:call(Node, ets, all, []), - true = rpc:call(Node, lists, any, [CCTabCreated,Tabs1]), % cache table created - ok = rpc:call(Node, code, rehash, []), - OkDir = filename:join(Priv, ""), - BadDir = filename:join(Priv, "guggemuffsussiputt"), - CP = [OkDir | rpc:call(Node, code, get_path, [])], - true = rpc:call(Node, code, set_path, [CP]), - CP1 = [BadDir | CP], - {error,_} = rpc:call(Node, code, set_path, [CP1]), - true = rpc:call(Node, code, del_path, [OkDir]), - true = rpc:call(Node, code, add_path, [OkDir]), - true = rpc:call(Node, code, add_path, [OkDir]), - {error,_} = rpc:call(Node, code, add_path, [BadDir]), - ok = rpc:call(Node, code, rehash, []), - - ?t:stop_node(Node), - ok. - -where_is_file_no_cache(suite) -> - []; -where_is_file_no_cache(doc) -> - []; -where_is_file_no_cache(Config) when is_list(Config) -> +where_is_file(Config) when is_list(Config) -> {T,KernelBeamFile} = timer:tc(code, where_is_file, ["kernel.beam"]), io:format("Load time: ~w ms~n", [T]), KernelEbinDir = filename:dirname(KernelBeamFile), @@ -1046,35 +911,6 @@ where_is_file_no_cache(Config) when is_list(Config) -> non_existing = code:where_is_file("kernel"), % no such file ok. -where_is_file_cached(suite) -> - []; -where_is_file_cached(doc) -> - []; -where_is_file_cached(Config) when is_list(Config) -> - {ok,Node} = - ?t:start_node(code_cache_node, peer, [{args, - "-code_path_cache"}, - {erl, [this]}]), - Tabs = rpc:call(Node, ets, all, []), - io:format("Tabs: ~w~n", [Tabs]), - CCTabCreated = fun(Tab) -> - case rpc:call(Node, ets, info, [Tab,name]) of - code_cache -> true; - _ -> false - end - end, - true = lists:any(CCTabCreated, Tabs), - KernelBeamFile = rpc:call(Node, code, where_is_file, ["kernel.beam"]), - {T,KernelBeamFile} = rpc:call(Node, timer, tc, [code,where_is_file,["kernel.beam"]]), - io:format("Load time: ~w ms~n", [T]), - KernelEbinDir = rpc:call(Node, filename, dirname, [KernelBeamFile]), - AppFile = rpc:call(Node, filename, join, [KernelEbinDir,"kernel.app"]), - AppFile = rpc:call(Node, code, where_is_file, ["kernel.app"]), - non_existing = rpc:call(Node, code, where_is_file, ["kernel"]), % no such file - ?t:stop_node(Node), - ok. - - purge_stacktrace(suite) -> []; purge_stacktrace(doc) -> -- cgit v1.2.3