::::::::::::::
t.erl
::::::::::::::
-module(t).
-export([go/0, l/0, run/1]).

%% @doc load
l()->
    net_adm:ping('a@ak-desktop'),
    net_adm:ping('b@ak-desktop'),
    net_adm:ping('c@ak-desktop').

go()->
    [{N,timer:tc(fun run/2, [N,10000 div N])} || N<-[1,5,20]].

run(N,R)->
    [rpc:parallel_eval([{t, run, [R]}]) || _<-lists:seq(1,N)].

run(R)->
    [X=server:foz(X) || X<-lists:seq(1,R)],
    ok.



::::::::::::::
server.erl
::::::::::::::
-module(server).
-export([start_link/0, foz/1]).

-behaviour(gen_server).
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
         terminate/2, code_change/3]).
-vsn(0).

-record(ate,
    { field = undefined :: any() %
    }).

-define(NAME,{global,?MODULE}).

%% @doc See: {@link start/1}
start_link() -> gen_server:start_link(?NAME, ?MODULE, {}, []).

foz(X)->gen_server:call(?NAME, {foz,X}).

%% @hidden gen_server
init(_Args) ->
    St = #ate{
        field = undefined
    },
    {ok, St}.

%% @hidden gen_server
handle_call({foz,X}, From, St) ->
    worker_sup:spawn(From, X),
    %worker:start_link(From, X),
    {noreply, St}.

%% @hidden gen_server
handle_cast(_Request, St) ->
    {stop, unimplemented, St}.

%% @hidden gen_server
handle_info(_Info, St) ->
    {stop, unimplemented, St}.

%% @hidden gen_server
terminate(_Reason, _St) ->
    ok.

%% @hidden gen_server
code_change(_OldVsn, St, _Extra) ->
    {ok, St}.



::::::::::::::
sup.erl
::::::::::::::
-module(sup).

-behaviour(supervisor).
-export([start_link/0, init/1]).
-vsn(0).


start_link() ->
    supervisor:start_link(?MODULE, {}).

%% @hidden supervisor
init(_Args) ->
    Restart = {rest_for_one, 2, 5},
    C0 = { server
         , {server,start_link,[]}
         , permanent
         , 200 % ms
         , worker
         , [server]
         },
    C1 = { worker_sup
         , {worker_sup,start_link,[]}
         , permanent
         , 200 % ms
         , worker
         , [worker_sup]
         },
    {ok,{Restart,[C0,C1]}}.





::::::::::::::
worker.erl
::::::::::::::
-module(worker).
-export([start_link/2]).

start_link(ReturnTo, X) ->
    {ok,spawn(fun()->foz(ReturnTo,X) end)}.

foz(ReturnTo, X) ->
    gen_server:reply(ReturnTo, X).





::::::::::::::
worker_sup.erl
::::::::::::::
-module(worker_sup).

-behaviour(supervisor).
-export([start_link/0, init/1, spawn/2]).
-vsn(0).


%% @doc Short description.
start_link() ->
    supervisor:start_link({local,?MODULE}, ?MODULE, {}).

%% @hidden supervisor
init(_Args) ->
    Restart = {simple_one_for_one, 2, 5},
    C0 = { worker
         , {worker,start_link,[]}
         , temporary
         , 200 % ms
         , worker
         , [worker]
         },
    {ok,{Restart,[C0]}}.

spawn(ReturnTo,X)->
    supervisor:start_child(?MODULE, [ReturnTo,X]).