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-rw-r--r--erts/preloaded/src/erl_prim_loader.erl76
-rw-r--r--erts/preloaded/src/init.erl51
2 files changed, 6 insertions, 121 deletions
diff --git a/erts/preloaded/src/erl_prim_loader.erl b/erts/preloaded/src/erl_prim_loader.erl
index 07c439a990..a8d1e4df76 100644
--- a/erts/preloaded/src/erl_prim_loader.erl
+++ b/erts/preloaded/src/erl_prim_loader.erl
@@ -42,7 +42,7 @@
-include("inet_boot.hrl").
%% Public
--export([start/3, set_path/1, get_path/0, get_file/1, get_files/2,
+-export([start/3, set_path/1, get_path/0, get_file/1,
list_dir/1, read_file_info/1, read_link_info/1, get_cwd/0, get_cwd/1]).
%% Used by erl_boot_server
@@ -69,7 +69,6 @@
timeout :: timeout(), % idle timeout
%% Number of timeouts before archives are released
n_timeouts :: non_neg_integer(),
- multi_get = false :: boolean(),
prim_state :: prim_state()}). % state for efile code loader
-define(IDLE_TIMEOUT, 60000). %% tear inet connection after 1 minutes
@@ -162,16 +161,11 @@ start_it("efile", Id, Pid, _Hosts) ->
_ ->
init_ack(Pid)
end,
- MultiGet = case erlang:system_info(thread_pool_size) of
- 0 -> false;
- _ -> true
- end,
PS = prim_init(),
State = #state {loader = efile,
id = Id,
data = Port,
timeout = infinity,
- multi_get = MultiGet,
prim_state = PS},
loop(State, Pid, []).
@@ -198,20 +192,6 @@ get_file(File) when is_atom(File) ->
get_file(File) ->
check_file_result(get_file, File, request({get_file,File})).
--spec get_files([{atom(), string()}],
- fun((atom(),binary(),string()) -> 'ok' | {'error', atom()})) ->
- 'ok' | {'error', atom()}.
-get_files(ModFiles, Fun) ->
- case request({get_files,{ModFiles,Fun}}) of
- E = {error,_M} ->
- E;
- {error,Reason,M} ->
- check_file_result(get_files, M, {error,Reason}),
- {error,M};
- ok ->
- ok
- end.
-
-spec list_dir(Dir) -> {'ok', Filenames} | 'error' when
Dir :: string(),
Filenames :: [Filename :: string()].
@@ -344,8 +324,6 @@ handle_request(Req, Paths, St0) ->
{{ok,Paths},St0};
{get_file,File} ->
handle_get_file(St0, Paths, File);
- {get_files,{ModFiles,Fun}} ->
- handle_get_files(St0, ModFiles, Paths, Fun);
{list_dir,Dir} ->
handle_list_dir(St0, Dir);
{read_file_info,File} ->
@@ -365,11 +343,6 @@ handle_request(Req, Paths, St0) ->
ignore
end.
-handle_get_files(State = #state{multi_get = true}, ModFiles, Paths, Fun) ->
- ?SAFE2(efile_multi_get_file_from_port(State, ModFiles, Paths, Fun), State);
-handle_get_files(State, _ModFiles, _Paths, _Fun) -> % no multi get
- {{error,no_multi_get},State}.
-
handle_get_file(State = #state{loader = efile}, Paths, File) ->
?SAFE2(efile_get_file_from_port(State, File, Paths), State);
handle_get_file(State = #state{loader = inet}, Paths, File) ->
@@ -420,53 +393,6 @@ handle_timeout(State = #state{loader = inet}, Parent) ->
%%% Functions which handle efile as prim_loader (default).
%%% --------------------------------------------------------
-%%% Reading many files in parallel is an optimization.
-%%% See also comment in init.erl.
-
-%% -> {ok,State} | {{error,Module},State} | {{error,Reason,Module},State}
-efile_multi_get_file_from_port(State, ModFiles, Paths, Fun) ->
- Ref = make_ref(),
- %% More than 200 processes is no gain.
- Max = erlang:min(200, erlang:system_info(thread_pool_size)),
- efile_multi_get_file_from_port2(ModFiles, 0, Max, State, Paths, Fun, Ref, ok).
-
-efile_multi_get_file_from_port2([MF | MFs], Out, Max, State, Paths, Fun, Ref, Ret) when Out < Max ->
- Self = self(),
- _Pid = spawn(fun() -> efile_par_get_file(Ref, State, MF, Paths, Self, Fun) end),
- efile_multi_get_file_from_port2(MFs, Out+1, Max, State, Paths, Fun, Ref, Ret);
-efile_multi_get_file_from_port2(MFs, Out, Max, _State, Paths, Fun, Ref, Ret) when Out > 0 ->
- receive
- {Ref, ok, State1} ->
- efile_multi_get_file_from_port2(MFs, Out-1, Max, State1, Paths, Fun, Ref, Ret);
- {Ref, {error,_Mod} = Error, State1} ->
- efile_multi_get_file_from_port2(MFs, Out-1, Max, State1, Paths, Fun, Ref, Error);
- {Ref, MF, {error,emfile,State1}} ->
- %% Max can take negative values. Out cannot.
- efile_multi_get_file_from_port2([MF | MFs], Out-1, Max-1, State1, Paths, Fun, Ref, Ret);
- {Ref, {M,_F}, {error,Error,State1}} ->
- efile_multi_get_file_from_port2(MFs, Out-1, 0, State1, Paths, Fun, Ref, {error,Error,M})
- end;
-efile_multi_get_file_from_port2(_MFs, 0, _Max, State, _Paths, _Fun, _Ref, Ret) ->
- {Ret,State}.
-
-efile_par_get_file(Ref, State, {Mod,File} = MF, Paths, Pid, Fun) ->
- %% One port for each file read in "parallel":
- case prim_file:start() of
- {ok, Port} ->
- Port0 = State#state.data,
- State1 = State#state{data = Port},
- R = case efile_get_file_from_port(State1, File, Paths) of
- {{error,Reason},State2} ->
- {Ref,MF,{error,Reason,State2}};
- {{ok,BinFile,Full},State2} ->
- %% Fun(...) -> ok | {error,Mod}
- {Ref,Fun(Mod, BinFile, Full),State2#state{data=Port0}}
- end,
- prim_file:close(Port),
- Pid ! R;
- {error, Error} ->
- Pid ! {Ref,MF,{error,Error,State}}
- end.
%% -> {{ok,BinFile,File},State} | {{error,Reason},State}
efile_get_file_from_port(State, File, Paths) ->
diff --git a/erts/preloaded/src/init.erl b/erts/preloaded/src/init.erl
index cc30999ba5..b5c1d46e60 100644
--- a/erts/preloaded/src/init.erl
+++ b/erts/preloaded/src/init.erl
@@ -85,7 +85,6 @@
path_choice,
prim_load,
load_mode,
- par_load,
vars
}).
@@ -749,13 +748,11 @@ do_boot(Init,Flags,Start) ->
Deb = b2a(get_flag(init_debug, Flags, false)),
catch ?ON_LOAD_HANDLER ! {init_debug_flag,Deb},
BootVars = get_boot_vars(Root, Flags),
- ParLoad = Pgm =:= "efile" andalso
- erlang:system_info(thread_pool_size) > 0,
PathChoice = code_path_choice(),
Es = #es{init=Init,debug=Deb,path=Path,pa=Pa,pz=Pz,
path_choice=PathChoice,
- prim_load=true,load_mode=LoadMode,par_load=ParLoad,
+ prim_load=true,load_mode=LoadMode,
vars=BootVars},
eval_script(BootList, Es),
@@ -857,15 +854,12 @@ eval_script([{kernel_load_completed}|T], #es{load_mode=Mode}=Es0) ->
_ -> Es0#es{prim_load=false}
end,
eval_script(T, Es);
-eval_script([{primLoad,Mods}|T], #es{init=Init,prim_load=PrimLoad,
- par_load=Par}=Es)
+eval_script([{primLoad,Mods}|T], #es{prim_load=PrimLoad}=Es)
when is_list(Mods) ->
- case {PrimLoad,Par} of
- {true,true} ->
- par_load_modules(Mods, Init);
- {true,false} ->
+ case PrimLoad of
+ true ->
load_modules(Mods);
- {false,_} ->
+ false ->
%% Do not load now, code_server does that dynamically!
ok
end,
@@ -892,41 +886,6 @@ load_modules([Mod|Mods]) ->
load_modules([]) ->
ok.
-%%% An optimization: erl_prim_loader gets the chance of loading many
-%%% files in parallel, using threads. This will reduce the seek times,
-%%% and loaded code can be processed while other threads are waiting
-%%% for the disk. The optimization is not tried unless the loader is
-%%% "efile" and there is a non-empty pool of threads.
-%%%
-%%% Many threads are needed to get a good result, so it would be
-%%% beneficial to load several applications in parallel. However,
-%%% measurements show that the file system handles one directory at a
-%%% time, regardless if parallel threads are created for files on
-%%% several directories (a guess: writing the meta information when
-%%% the file was last read ('mtime'), forces the file system to sync
-%%% between directories).
-
-par_load_modules(Mods,Init) ->
- Ext = objfile_extension(),
- ModFiles = [{Mod,concat([Mod,Ext])} || Mod <- Mods,
- not erlang:module_loaded(Mod)],
- Self = self(),
- Fun = fun(Mod, BinCode, FullName) ->
- case catch load_mod_code(Mod, BinCode, FullName) of
- {ok, _} ->
- Init ! {Self,loaded,{Mod,FullName}},
- ok;
- _EXIT ->
- {error, Mod}
- end
- end,
- case erl_prim_loader:get_files(ModFiles, Fun) of
- ok ->
- ok;
- {error,Mod} ->
- exit({'cannot load',Mod,get_files})
- end.
-
make_path(Pa, Pz, Path, Vars) ->
append([Pa,append([fix_path(Path,Vars),Pz])]).
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 01:32:19 +0000