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authorBjörn Gustavsson <[email protected]>2015-12-11 16:25:34 +0100
committerBjörn Gustavsson <[email protected]>2015-12-14 15:57:30 +0100
commit3131a94b5d2ce2b95aa0efb99c767e3658f24550 (patch)
tree48dfccb00163154532f81a5d638b3262af4600b1 /lib/kernel/test
parent3ecefb19e555e52e35c8f2c5178c72f165c4a7ce (diff)
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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.
Diffstat (limited to 'lib/kernel/test')
-rw-r--r--lib/kernel/test/code_SUITE.erl172
1 files changed, 4 insertions, 168 deletions
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) ->