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Added new ejabberd profiler
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@ -115,6 +115,7 @@
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nodetree_virtual,
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p1_fsm,
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p1_mnesia,
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p1_prof,
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randoms,
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sha,
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shaper,
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196
src/p1_prof.erl
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196
src/p1_prof.erl
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@ -0,0 +1,196 @@
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%%%-------------------------------------------------------------------
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%%% File : p1_prof.erl
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%%% Author : Evgeniy Khramtsov <ekhramtsov@process-one.net>
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%%% Description : Handly wrapper around eprof and fprof
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%%%
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%%% Created : 23 Jan 2010 by Evgeniy Khramtsov <ekhramtsov@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2010 ProcessOne
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%%%
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%%% This program is free software; you can redistribute it and/or
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%%% modify it under the terms of the GNU General Public License as
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%%% published by the Free Software Foundation; either version 2 of the
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%%% License, or (at your option) any later version.
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%%%
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%%% This program is distributed in the hope that it will be useful,
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%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
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%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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%%% General Public License for more details.
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%%%
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%%% You should have received a copy of the GNU General Public License
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%%% along with this program; if not, write to the Free Software
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%%% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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%%% 02111-1307 USA
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%%%
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%%%-------------------------------------------------------------------
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-module(p1_prof).
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%% API
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-export([eprof_start/0, eprof_stop/0,
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fprof_start/0, fprof_start/1,
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fprof_stop/0]).
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-define(APPS, [ejabberd, mnesia]).
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%%====================================================================
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%% API
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%%====================================================================
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eprof_start() ->
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eprof:start(),
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case lists:keyfind(running, 1, application:info()) of
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{_, Apps} ->
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case get_procs(?APPS, Apps) of
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[] ->
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{error, no_procs_found};
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Procs ->
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eprof:start_profiling(Procs)
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end;
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_ ->
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{error, no_app_info}
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end.
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fprof_start() ->
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fprof_start(0).
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fprof_start(Duration) ->
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case lists:keyfind(running, 1, application:info()) of
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{_, Apps} ->
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case get_procs(?APPS, Apps) of
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[] ->
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{error, no_procs_found};
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Procs ->
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fprof:trace([start, {procs, Procs}]),
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if Duration > 0 ->
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timer:sleep(Duration*1000),
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fprof:trace([stop]);
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true->
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ok
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end
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end;
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_ ->
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{error, no_app_info}
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end.
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fprof_stop() ->
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fprof:trace([stop]),
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fprof:profile(),
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fprof:analyse([totals, no_details, {sort, own},
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no_callers, {dest, "fprof.analysis"}]),
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fprof:stop(),
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format_fprof_analyze().
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eprof_stop() ->
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eprof:stop_profiling(),
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eprof:analyse().
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%%====================================================================
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%% Internal functions
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%%====================================================================
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get_procs(Apps, AppList) ->
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io:format("Searching for processes to profile...~n", []),
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Procs = lists:flatmap(
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fun({App, Leader}) when is_pid(Leader) ->
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case lists:member(App, Apps) of
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true ->
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get_procs(Leader);
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false ->
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[]
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end;
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(_) ->
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[]
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end, AppList),
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io:format("Found ~p processes~n", [length(Procs)]),
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Procs.
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get_procs(Leader) ->
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lists:filter(
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fun(Pid) ->
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case process_info(Pid, group_leader) of
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{_, Leader} ->
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true;
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_ ->
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false
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end
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end, processes()).
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format_fprof_analyze() ->
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case file:consult("fprof.analysis") of
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{ok, [_, [{totals, _, _, TotalOWN}] | Rest]} ->
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OWNs = lists:flatmap(
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fun({MFA, _, _, OWN}) ->
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Percent = OWN*100/TotalOWN,
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case round(Percent) of
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0 ->
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[];
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_ ->
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[{mfa_to_list(MFA), Percent}]
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end
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end, Rest),
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ACCs = collect_accs(Rest),
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MaxACC = find_max(ACCs),
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MaxOWN = find_max(OWNs),
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io:format("=== Sorted by OWN:~n"),
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lists:foreach(
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fun({MFA, Per}) ->
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L = length(MFA),
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S = lists:duplicate(MaxOWN - L + 2, $ ),
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io:format("~s~s~.2f%~n", [MFA, S, Per])
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end, lists:reverse(lists:keysort(2, OWNs))),
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io:format("~n=== Sorted by ACC:~n"),
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lists:foreach(
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fun({MFA, Per}) ->
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L = length(MFA),
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S = lists:duplicate(MaxACC - L + 2, $ ),
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io:format("~s~s~.2f%~n", [MFA, S, Per])
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end, lists:reverse(lists:keysort(2, ACCs)));
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Err ->
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Err
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end.
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mfa_to_list({M, F, A}) ->
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atom_to_list(M) ++ ":" ++ atom_to_list(F) ++ "/" ++ integer_to_list(A);
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mfa_to_list(F) when is_atom(F) ->
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atom_to_list(F).
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find_max(List) ->
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find_max(List, 0).
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find_max([{V, _}|Tail], Acc) ->
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find_max(Tail, lists:max([length(V), Acc]));
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find_max([], Acc) ->
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Acc.
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collect_accs(List) ->
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List1 = lists:filter(
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fun({MFA, _, _, _}) ->
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case MFA of
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{sys, _, _} ->
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false;
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suspend ->
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false;
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{gen_fsm, _, _} ->
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false;
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{p1_fsm, _, _} ->
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false;
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{gen, _, _} ->
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false;
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{gen_server, _, _} ->
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false;
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{proc_lib, _, _} ->
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false;
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_ ->
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true
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end
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end, List),
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TotalACC = lists:sum([A || {_, _, A, _} <- List1]),
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lists:flatmap(
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fun({MFA, _, ACC, _}) ->
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Percent = ACC*100/TotalACC,
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case round(Percent) of
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0 ->
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[];
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_ ->
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[{mfa_to_list(MFA), Percent}]
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end
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end, List1).
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