[erlang-questions] about erlang eprof tool. Why is the handle_info and handle_cast without in the result

jasonlxw <>
Wed May 18 12:20:22 CEST 2011


I try  to do after adding seelp.
It is ok .
You are right.
Thank you,

2011/5/18 Ahmed Omar [via Erlang] <
>

> Sending a message (handled by handle_info) or doing a cast (handled by
> handle_cast) are both async.
> You are stopping the profiler too early.
> Changing the order to do the async operations first, then the sync one
> should assure that all the requests have been handled before you stop eprof
>
> On Wed, May 18, 2011 at 10:57 AM, 郎咸武 <[hidden email]<http://user/SendEmail.jtp?type=node&node=3532180&i=0>
> > wrote:
>
>> hi everybody:
>> I write a test 'chat' code with eprof.
>> I have found the handle_info and handle_cast functions without in the
>> anaylise result.
>> Why ?
>>
>> thanks
>> Regards
>> jason
>>
>>   1 -module(chat).
>>
>>
>>   2 -compile(export_all).
>>   3 %-behaviour(gen_server).
>>   4 start(N) ->
>>   5     start_link(),
>>   6     eprof:start(),
>>   7     eprof:start_profiling([chat]),
>>   8     test(N),
>>   9     testcast(),
>>  10     test(),
>>  11     eprof:stop_profiling(),
>>  12     eprof:log(chat),
>>  13     eprof:analyse(),
>>  14     eprof:total_analyse().
>>  15
>>  16 test(N)->
>>  17     gen_server:call(?MODULE, {test,N}).
>>  18 test()->
>>  19     chat ! {test,1}.
>>  20 testcast() ->
>>  21     gen_server:cast(?MODULE,castttt).
>>  22
>>  23 start_link() ->
>>  24     gen_server:start_link({local,?MODULE},?MODULE,[],[]).
>>  25
>>  26 init([]) ->
>>  27     {ok, {}}.
>>  28
>>  29 handle_cast(Msg,State) ->
>>  30     tttt(),
>>  31     io:format("cast=~p~n",[Msg]),
>>  32     {noreply,State}.
>>  33
>>  34 handle_call({test,Number},From, State) when is_number(Number) ->
>>  35     Reply = Number+1,
>>  36     {reply, Reply,State};
>>  37
>>  38 handle_call(_,From, State) ->
>>  39     Reply = numerror,
>>  40     {reply, Reply,State}.
>>   41 handle_info(Ino,State) ->
>>  42     tttt(),
>>  43     io:format("info=~p~n",[Ino]),
>>  44     {noreply,State}.
>>  45 tttt() ->
>>  46     ok.
>> %%%%%%%%%%%%%%%%%
>> Test result
>> 5> chat:start(1).
>> eprof: Starting profiling .....
>> eprof: Stop profiling
>> cast=castttt
>> info={test,1}
>> FUNCTION                                       CALLS      TIME
>>
>> ****** Process <0.35.0>    -- 100 % of profiled time ***
>> gen_server:loop/6                               1          30 %
>> gen_server:handle_msg/5                   1          28 %
>> chat:handle_call/3                              1          21 %
>> gen_server:reply/2                             1          14 %
>> gen_server:decode_msg/8                  1          8 %
>>
>> Total time: 0.00
>> Measurement overhead: 0.00
>> FUNCTION                                       CALLS      TIME
>> gen_server:loop/6                                1          30 %
>> gen_server:handle_msg/5                     1          28 %
>> chat:handle_call/3                                1          21 %
>> gen_server:reply/2                               1          14 %
>> gen_server:decode_msg/8                    1          8 %
>>
>> Total time: 0.00
>> Measurement overhead: 0.00
>> ok
>> 6>
>>
>>
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>>
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>>
>>
>
>
> --
> Best Regards,
> - Ahmed Omar
> http://nl.linkedin.com/in/adiaa
> Follow me on twitter
> @spawn_think <http://twitter.com/#%21/spawn_think>
>
>
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