%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2002-2010. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%
%%
%%----------------------------------------------------------------------
%% Purpose: Measure megaco codec's encoding & decoding time's
%%
%% Measurement process consists of:
%% For each message in a directory:
%% Pre: Read message from the file, close the file
%% Measurement: 1) measure decode
%% 2) measure encode (of the previously decoded message)
%% Post: Print average
%% For each directory:
%% A summery is written, both to the console and to a file,
%% in an excel compatible format.
%%
%% megaco_codec_meas:t().
%% megaco_codec_meas:t([pretty, compact]).
%% megaco_codec_meas:t([per, pretty, compact]).
%%
%%----------------------------------------------------------------------
-module(megaco_codec_meas).
%% -compile(export_all).
%% API
%% Avoid warning for local function error/2 clashing with autoimported BIF.
-compile({no_auto_import,[error/2]}).
-export([start/0, start/1]).
-export([start1/0]).
%% Internal exports
-export([do_measure_codec/7, do_measure_codec_loop/7]).
-export([flex_scanner_handler/1]).
-include_lib("kernel/include/file.hrl").
-define(V3, v3).
-define(MEASURE_TIMEOUT, 100000). % 100 sec
-ifndef(MEASURE_COUNT_TIME).
-define(MEASURE_COUNT_TIME, 1*1000*1000). % 1 seconds
-endif.
-ifndef(MEASURE_TIME).
-define(MEASURE_TIME, 10000).
-endif.
-ifndef(MEASURE_CODECS).
-define(MEASURE_CODECS, megaco_codec_transform:codecs()).
-endif.
-define(DEFAULT_MESSAGE_PACKAGE, megaco_codec_transform:default_message_package()).
-record(stat, {name, ecount, etime, dcount, dtime, size}).
%% Runs the measurement on all "official" codecs
start1() ->
put(everbose,true),
start().
start() ->
meas_init(?DEFAULT_MESSAGE_PACKAGE, ?MEASURE_CODECS).
start([MessagePackage]) ->
do_start(MessagePackage, ?MEASURE_CODECS);
start(MessagePackage) ->
do_start(MessagePackage, ?MEASURE_CODECS).
do_start(MessagePackageRaw, Codecs) ->
MessagePackage = parse_message_package(MessagePackageRaw),
meas_init(MessagePackage, Codecs).
parse_message_package(MessagePackageRaw) when is_list(MessagePackageRaw) ->
list_to_atom(MessagePackageRaw);
parse_message_package(MessagePackage) when is_atom(MessagePackage) ->
MessagePackage;
parse_message_package(BadMessagePackage) ->
throw({error, {bad_message_package, BadMessagePackage}}).
%% Dirs is a list of directories containing files,
%% each with a single megaco message.
%%
%% Note that it is a requirement that each dir has
%% the name of the codec with which the messages has
%% been encoded:
%%
%% pretty | compact | ber | per | erlang
%%
meas_init(MessagePackage, Codecs) ->
%% process_flag(trap_exit, true),
io:format("~nRun meas on message package: ~p~n~n", [MessagePackage]),
display_os_info(),
display_system_info(),
display_app_info(),
io:format("~n", []),
Started = now(),
case megaco_codec_transform:messages(MessagePackage) of
Messages when is_list(Messages) ->
ExpandedMessages = expand_messages(Codecs, Messages),
Results = t1(ExpandedMessages, []),
display_time(Started, now()),
store_results(Results);
Error ->
Error
end.
display_os_info() ->
V = case os:version() of
{Major, Minor, Release} ->
lists:flatten(
io_lib:format("~w.~w.~w", [Major, Minor, Release]));
Str ->
Str
end,
case os:type() of
{OsFam, OsName} ->
io:format("OS: ~p-~p: ~s~n", [OsFam, OsName, V]);
OsFam ->
io:format("OS: ~p: ~s~n", [OsFam, V])
end.
display_system_info() ->
SysArch = string:strip(erlang:system_info(system_architecture),right,$\n),
SysVer = string:strip(erlang:system_info(system_version),right,$\n),
io:format("System architecture: ~s~n", [SysArch]),
io:format("System version: ~s~n", [SysVer]),
ok.
display_app_info() ->
display_megaco_info(),
display_asn1_info().
display_megaco_info() ->
MI = megaco:module_info(),
{value, {attributes, Attr}} = lists:keysearch(attributes, 1, MI),
{value, {app_vsn, Ver}} = lists:keysearch(app_vsn, 1, Attr),
FlexStr =
case megaco_flex_scanner:is_enabled() of
true ->
case megaco_flex_scanner:is_reentrant_enabled() of
true ->
"reentrant flex";
false ->
"non-reentrant flex"
end;
false ->
"no flex"
end,
io:format("Megaco version: ~s (~s)~n", [Ver, FlexStr]).
display_asn1_info() ->
AI = megaco_ber_media_gateway_control_v1:info(),
Vsn =
case lists:keysearch(vsn, 1, AI) of
{value, {vsn, V}} when is_atom(V) ->
atom_to_list(V);
{value, {vsn, V}} when is_list(V) ->
V;
_ ->
"unknown"
end,
io:format("ASN.1 version: ~s~n", [Vsn]).
%% {MegaSec, Sec, MicroSec}
display_time(Start, Fin) ->
FormatDate1 = format_timestamp(Start),
FormatDate2 = format_timestamp(Fin),
FormatDiff = format_diff(Start, Fin),
io:format("Started: ~s~n", [FormatDate1]),
io:format("Finished: ~s~n", [FormatDate2]),
io:format(" ~s~n~n~n", [FormatDiff]),
ok.
format_timestamp({_N1, _N2, N3} = Now) ->
{Date, Time} = calendar:now_to_datetime(Now),
{YYYY,MM,DD} = Date,
{Hour,Min,Sec} = Time,
FormatDate =
io_lib:format("~.4w:~.2.0w:~.2.0w ~.2.0w:~.2.0w:~.2.0w 4~w",
[YYYY,MM,DD,Hour,Min,Sec,round(N3/1000)]),
lists:flatten(FormatDate).
format_diff(Start, Fin) ->
DateTime1 = calendar:now_to_universal_time(Start),
DateTime2 = calendar:now_to_universal_time(Fin),
T1 = calendar:datetime_to_gregorian_seconds(DateTime1),
T2 = calendar:datetime_to_gregorian_seconds(DateTime2),
{_, Diff} = calendar:gregorian_seconds_to_datetime(T2 - T1),
Tmp =
case Diff of
{0, 0, S} ->
io_lib:format("~.2.0w sec", [S]);
{0, M, S} ->
io_lib:format("~w min ~.2.0w sec", [M,S]);
{H, M, S} ->
io_lib:format("~w hour ~w min ~.2.0w sec", [H,M,S])
end,
lists:flatten(Tmp).
t1([], Results) ->
lists:reverse(Results);
t1([{Id, Codec, Conf, _, _} = ECodec|EMsgs], Results) ->
case (catch measure(ECodec)) of
{'EXIT', Reason} ->
error("measure of codec ~p exited: ~n~p", [Codec, Reason]),
t1(EMsgs, Results);
{error, Reason} ->
error("skipping codec ~p: ~n~p", [Codec, Reason]),
t1(EMsgs, Results);
{ok, Res} ->
t1(EMsgs, [{Id, Conf, Res}| Results])
end.
measure({Id, Codec, Conf, Count, Msgs}) ->
io:format("measure using codec ~p ~p~n ", [Codec, Conf]),
{Init, Conf1} = measure_init(Conf),
Conf2 = [{version3,?V3}|Conf1],
Res = measure(Id, Codec, Conf2, Msgs, [], Count),
measure_fin(Init),
Res.
expand_messages(Codecs, Messages) ->
ECodecs = expand_codecs(Codecs, []),
expand_messages(ECodecs, Messages, []).
expand_messages([], _, EMessages) ->
lists:reverse(EMessages);
expand_messages([{Id, Codec, Conf, Count} | ECodecs], Messages, EMessages) ->
case lists:keysearch(Id, 1, Messages) of
{value, {Id, Msgs}} ->
expand_messages(ECodecs, Messages,
[{Id, Codec, Conf, Count, Msgs}|EMessages]);
false ->
exit({error, {no_such_codec_data, Id}})
end.
expand_codecs([], ECodecs) ->
lists:reverse(lists:flatten(ECodecs));
expand_codecs([Codec|Codecs], ECodecs) when is_atom(Codec) ->
ECodec = expand_codec(Codec),
expand_codecs(Codecs, [ECodec|ECodecs]).
expand_codec(Codec) ->
case Codec of
pretty ->
[{Codec, megaco_pretty_text_encoder, [flex_scanner], 2000},
{Codec, megaco_pretty_text_encoder, [], 1000}];
compact ->
[{Codec, megaco_compact_text_encoder, [flex_scanner], 3000},
{Codec, megaco_compact_text_encoder, [], 1500}];
ber ->
[{Codec, megaco_ber_encoder, [native], 3000},
{Codec, megaco_ber_encoder, [], 1000}];
per ->
[{Codec, megaco_per_encoder, [native], 3000},
{Codec, megaco_per_encoder, [], 1000}];
erlang ->
[
{Codec, megaco_erl_dist_encoder, [megaco_compressed,compressed], 500},
{Codec, megaco_erl_dist_encoder, [compressed], 400},
{Codec, megaco_erl_dist_encoder, [megaco_compressed], 10000},
{Codec, megaco_erl_dist_encoder, [], 10000}
];
Else ->
exit({error, {invalid_codec, Else}})
end.
measure_init([flex_scanner]) ->
start_flex_scanner();
measure_init(Conf) ->
{undefined, Conf}.
measure_fin(Pid) when is_pid(Pid) ->
stop_flex_scanner(Pid),
ok;
measure_fin(_) ->
ok.
measure(_Dir, _Codec, _Conf, [], [], _MCount) ->
{error, no_messages};
measure(_Dir, _Codec, _Conf, [], Res, _MCount) ->
Eavg = avg([Etime/Ecnt || #stat{ecount = Ecnt, etime = Etime} <- Res]),
Davg = avg([Dtime/Dcnt || #stat{dcount = Dcnt, dtime = Dtime} <- Res]),
Savg = avg([Size || #stat{size = Size} <- Res]),
io:format("~n Measurment on ~p messages:"
"~n Average size: ~w bytes, "
"~n encode: ~w microsec, "
"~n decode: ~w microsec~n~n",
[length(Res), Savg, Eavg, Davg]),
{ok, lists:reverse(Res)};
measure(Dir, Codec, Conf, [{Name, Bin}|Msgs], Results, MCount) ->
io:format(" ~p", [Name]),
case (catch do_measure(Dir, Codec, Conf, Name, Bin, MCount)) of
{ok, Stat} ->
measure(Dir, Codec, Conf, Msgs, [Stat | Results], MCount);
{error, S} ->
io:format("~n~s failed: ~n", [Name]),
error(S,[]),
measure(Dir, Codec, Conf, Msgs, Results, MCount);
{info, S} ->
case get(verbose) of
true ->
io:format("~n", []),
info(S,[]);
_ ->
io:format("~n~s skipped~n", [Name])
end,
measure(Dir, Codec, Conf, Msgs, Results, MCount)
end.
do_measure(_Id, Codec, Conf, Name, BinMsg, MCount) ->
%% io:format("~n~s~n", [binary_to_list(BinMsg)]),
{Version, NewBin} = detect_version(Codec, Conf, BinMsg),
{Msg, Dcnt, Dtime} = measure_decode(Codec, Conf, Version, NewBin, MCount),
{_, Ecnt, Etime} = measure_encode(Codec, Conf, Version, Msg, MCount),
{ok, #stat{name = Name,
ecount = Ecnt, etime = Etime,
dcount = Dcnt, dtime = Dtime,
size = size(NewBin)}}.
detect_version(Codec, Conf, Bin) ->
case (catch Codec:version_of(Conf, Bin)) of
{ok, V} ->
io:format("[~w]", [V]),
{ok, M} = Codec:decode_message(Conf, V, Bin),
{ok, NewBin} = Codec:encode_message(Conf, V, M),
io:format("[~w]", [size(NewBin)]),
{V, NewBin};
Error ->
io:format("~nversion detection failed:~n~p", [Error]),
Error
end.
measure_decode(Codec, Conf, Version, Bin, MCount) ->
case measure_codec(Codec, decode_message, Conf, Version, Bin, MCount) of
{ok, Res} ->
Res;
{error, Reason} ->
S = format("decode failed for ~p:~n~p", [Codec, Reason]),
throw({error, S})
end.
measure_encode(Codec, Conf, Version, Bin, MCount) ->
case measure_codec(Codec, encode_message, Conf, Version, Bin, MCount) of
{ok, Res} ->
Res;
{error, Reason} ->
S = format("encode failed for ~p:~n~p", [Codec, Reason]),
throw({error, S})
end.
measure_codec(Codec, Func, Conf, Version, Bin, MCount) ->
Pid = spawn_link(?MODULE, do_measure_codec,
[self(), Codec, Func, Conf, Version, Bin, MCount]),
receive
{measure_result, Pid, Func, Res} ->
{ok, Res};
{error, Pid, Error} ->
{error, Error};
Else ->
{error, {unexpected_result, Else}}
after ?MEASURE_TIMEOUT ->
Info =
case (catch process_info(Pid)) of
I when is_list(I) ->
exit(Pid, kill),
I;
_ ->
undefined
end,
{error, {timeout, MCount, Info}}
end.
do_measure_codec(Parent, Codec, Func, Conf, Version, Bin, MCount) ->
{ok, Count} = measure_warmup(Codec, Func, Conf, Version, Bin, MCount),
Res = timer:tc(?MODULE, do_measure_codec_loop,
[Codec, Func, Conf, Version, Bin, Count, dummy]),
case Res of
{Time, {ok, M}} ->
%% io:format("~w ", [Time]),
Parent ! {measure_result, self(), Func, {M, Count, Time}};
{_Time, Error} ->
Parent ! {error, self(), Error}
end,
unlink(Parent). % Make sure Parent don't get our exit signal
%% This function does more mor less what the real measure function
%% above does. But with the diff:
%% 1) Warmup to ensure that all used code are loaded
%% 2) To aproximate the encoding time, to ensure that
%% the real encode is done with enough iterations.
measure_warmup(Codec, Func, Conf, Version, M, MCount) ->
Res = timer:tc(?MODULE, do_measure_codec_loop,
[Codec, Func, Conf, Version, M, MCount, dummy]),
case Res of
{Time, {ok, _}} ->
%% OK so far, now calculate the count:
Count = round(?MEASURE_COUNT_TIME/(Time/MCount)),
%% io:format("~w ", [Count]),
{ok, Count};
{_Time, Error} ->
{error, {warmup_failed, Error}}
end.
do_measure_codec_loop(_Codec, _Func, _Conf, _Version, _Bin, 0, M) ->
{ok, M};
do_measure_codec_loop(Codec, Func, Conf, Version, Bin, Count, _) ->
{ok, M} = apply(Codec, Func, [Conf, Version, Bin]),
do_measure_codec_loop(Codec, Func, Conf, Version, Bin, Count - 1, M).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
store_results(Results) ->
io:format("storing: ~n", []),
store_excel_message_size(Results),
store_excel_decode_time(Results),
store_excel_encode_time(Results),
store_excel_total_time(Results),
io:format("~n", []),
ok.
store_excel_message_size(Res) ->
Filename = "message_size.xls",
io:format(" creating ~s~n", [Filename]),
{ok, Fd} = file:open(Filename,[write]),
Sizes = message_sizes(Res, []),
store_excel_tab(Fd, Sizes),
ok.
store_excel_decode_time(Res) ->
Filename = "decode_time.xls",
io:format(" creating ~s~n", [Filename]),
{ok, Fd} = file:open(Filename,[write]),
Decodes = dec_times(Res, []),
store_excel_tab(Fd, Decodes),
ok.
store_excel_encode_time(Res) ->
Filename = "encode_time.xls",
io:format(" creating ~s~n", [Filename]),
{ok, Fd} = file:open(Filename,[write]),
Encodes = enc_times(Res, []),
store_excel_tab(Fd, Encodes),
ok.
store_excel_total_time(Res) ->
Filename = "total_time.xls",
io:format(" creating ~s~n", [Filename]),
{ok, Fd} = file:open(Filename,[write]),
Totals = tot_times(Res, []),
store_excel_tab(Fd, Totals),
ok.
message_sizes([], Sizes) ->
lists:reverse(Sizes);
message_sizes([{Dir, Conf, Res}|T], Acc) ->
Sizes = [Size || #stat{size = Size} <- Res],
Avg = avg(Sizes),
message_sizes(T, [{Dir, Conf, Avg, Sizes}|Acc]).
dec_times([], Times) ->
lists:reverse(Times);
dec_times([{Dir, Conf, Res}|T], Acc) ->
Times = [Time/Count || #stat{dcount = Count, dtime = Time} <- Res],
Avg = avg(Times),
dec_times(T, [{Dir, Conf, Avg, Times}|Acc]).
enc_times([], Times) ->
lists:reverse(Times);
enc_times([{Dir, Conf, Res}|T], Acc) ->
Times = [Time/Count || #stat{ecount = Count, etime = Time} <- Res],
Avg = avg(Times),
enc_times(T, [{Dir, Conf, Avg, Times}|Acc]).
tot_times([], Times) ->
lists:reverse(Times);
tot_times([{Dir, Conf, Res}|T], Acc) ->
Times = [(Etime/Ecnt)+(Dtime/Dcnt) || #stat{ecount = Ecnt,
etime = Etime,
dcount = Dcnt,
dtime = Dtime} <- Res],
Avg = avg(Times),
tot_times(T, [{Dir, Conf, Avg, Times}|Acc]).
avg(Vals) ->
round(lists:sum(Vals)/length(Vals)).
store_excel_tab(_Fd, []) ->
ok; % Just in case there was something wrong with the test
store_excel_tab(Fd, Res) ->
%% For all elements of this list, the Values is of the same length...
[{_, _, _, Values}|_] = Res,
store_excel_tab_header(Fd, length(Values), 1),
store_excel_tab1(Fd, Res).
store_excel_tab1(Fd, []) ->
io:format(Fd, "~n", []);
store_excel_tab1(Fd, [{Dir, Conf, Avg, Values}|T]) when is_list(Conf) ->
io:format(Fd, "~s~s (~w)",
[filename:basename(Dir), config_to_string(Conf), Avg]),
store_excel_tab_row(Fd, Values),
store_excel_tab1(Fd, T).
config_to_string([]) ->
"";
config_to_string([C]) when is_atom(C) ->
io_lib:format("_~w", [C]);
config_to_string([C|Cs]) when is_atom(C) ->
lists:flatten(io_lib:format("_~w", [C]) ++ config_to_string(Cs)).
store_excel_tab_header(Fd, 0, _) ->
io:format(Fd, "~n", []);
store_excel_tab_header(Fd, N, M) ->
io:format(Fd, "\t~w", [M]),
store_excel_tab_header(Fd, N-1, M+1).
store_excel_tab_row(Fd, []) ->
io:format(Fd, "~n", []);
store_excel_tab_row(Fd, [Value|Values]) ->
io:format(Fd, "\t~w", [round(Value)]),
store_excel_tab_row(Fd, Values).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
start_flex_scanner() ->
Pid = proc_lib:spawn(?MODULE, flex_scanner_handler, [self()]),
receive
{flex_scanner_started, Pid, Conf} ->
{Pid, [Conf]};
{flex_scanner_error, {failed_loading_flex_scanner_driver, Reason}} ->
throw({error, {failed_loading_flex_scanner_driver, Reason}});
{flex_scanner_error, Reason} ->
throw({error, {failed_loading_flex_scanner_driver, Reason}})
after 10000 ->
exit(Pid, kill),
throw({error, {failed_starting_flex_scanner, timeout}})
end.
stop_flex_scanner(Pid) ->
Pid ! stop_flex_scanner.
flex_scanner_handler(Pid) ->
case (catch megaco_flex_scanner:start()) of
{ok, Port} when is_port(Port) ->
Pid ! {flex_scanner_started, self(), {flex, Port}},
flex_scanner_handler(Pid, Port);
{ok, Ports} when is_tuple(Ports) ->
Pid ! {flex_scanner_started, self(), {flex, Ports}},
flex_scanner_handler(Pid, Ports);
{error, {load_driver, {open_error, Reason}}} ->
Error = {failed_loading_flex_scanner_driver, Reason},
Pid ! {flex_scanner_error, Error},
exit(Error);
Else ->
Error = {unknown_result_from_start_flex_scanner, Else},
Pid ! {flex_scanner_error, Error},
exit(Error)
end.
flex_scanner_handler(Pid, PortOrPorts) ->
receive
{ping, Pinger} ->
Pinger ! {pong, self()},
flex_scanner_handler(Pid, PortOrPorts);
{'EXIT', Port, Reason} ->
case megaco_flex_scanner:is_scanner_port(Port, PortOrPorts) of
true ->
Pid ! {flex_scanner_exit, Reason},
exit({flex_scanner_exit, Reason});
false ->
info("exit signal from unknown port ~p"
"~n Reason: ~p", [Port, Reason]),
flex_scanner_handler(Pid, PortOrPorts)
end;
stop_flex_scanner ->
megaco_flex_scanner:stop(PortOrPorts),
exit(normal);
Other ->
info("flex scanner handler got something:~n~p", [Other]),
flex_scanner_handler(Pid, PortOrPorts)
end.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
info(F, A) ->
io:format(F ++ "~n", A).
error(F, A) ->
io:format("ERROR: " ++ F ++ "~n", A).
format(F, A) ->
lists:flatten(io_lib:format(F, A)).
