Profiling emacs.

Profiling emacs.

[A. Soare]

Today I tried to compile Emacs including the profiler like so:

CFLAGS=-pg LDFLAGS=-pg ./configure --without-x && make

Emacs creates a profile 

However, when I run ./emacs -Q it creates the same gmon.out at all the times, even if I run and make something in emacs a few seconds or 1 minute.

-rw-r--r-- 1 root root 4625 2009-03-25 11:45 gmon.out

Running
gprof emacs gmon.out | less

it shows just help information, nothing about the symbols of emacs.

Could you help me with some idea how to compile emacs includin the profiler?




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Re: Profiling emacs.

[Eli Zaretskii]

> From: "A. Soare" <alinsoar@voila.fr>
> Date: Wed, 25 Mar 2009 17:09:38 +0100 (CET)
> 
> Today I tried to compile Emacs including the profiler like so:
> 
> CFLAGS=-pg LDFLAGS=-pg ./configure --without-x && make
> 
> Emacs creates a profile 
> 
> However, when I run ./emacs -Q it creates the same gmon.out at all the times, even if I run and make something in emacs a few seconds or 1 minute.
> 
> -rw-r--r-- 1 root root 4625 2009-03-25 11:45 gmon.out
> 
> Running
> gprof emacs gmon.out | less
> 
> it shows just help information, nothing about the symbols of emacs.
> 
> Could you help me with some idea how to compile emacs includin the profiler?

This is a commentary from emacs.c:

  /* Set up for profiling.  This is known to work on FreeBSD,
     GNU/Linux and MinGW.  It might work on some other systems too.
     Give it a try and tell us if it works on your system.  To compile
     for profiling, add -pg to the switches your platform uses in
     CFLAGS and LDFLAGS.  For example:
       `make CFLAGS="-pg -g -O -DPROFILING=1" LDFLAGS="-pg -g"'.  */

Re: Profiling emacs.

[Stefan Monnier]

>> Today I tried to compile Emacs including the profiler like so:
>> 
>> CFLAGS=-pg LDFLAGS=-pg ./configure --without-x && make
>> 
>> Emacs creates a profile 
>> 
>> However, when I run ./emacs -Q it creates the same gmon.out at all the times, even if I run and make something in emacs a few seconds or 1 minute.
>> 
>> -rw-r--r-- 1 root root 4625 2009-03-25 11:45 gmon.out
>> 
>> Running
>> gprof emacs gmon.out | less
>> 
>> it shows just help information, nothing about the symbols of emacs.
>> 
>> Could you help me with some idea how to compile emacs includin the profiler?

> This is a commentary from emacs.c:

>   /* Set up for profiling.  This is known to work on FreeBSD,
>      GNU/Linux and MinGW.  It might work on some other systems too.
>      Give it a try and tell us if it works on your system.  To compile
>      for profiling, add -pg to the switches your platform uses in
>      CFLAGS and LDFLAGS.  For example:
>        `make CFLAGS="-pg -g -O -DPROFILING=1" LDFLAGS="-pg -g"'.  */

Yes, IIRC the -DPROFILING is the important one, otherwise only temacs
is profiled.


        Stefan

Re: Profiling emacs.

[A. Soare]

>        `make CFLAGS="-pg -g -O -DPROFILING=1" LDFLAGS="-pg -g"'.  */
> 
> Yes, IIRC the -DPROFILING is the important one, otherwise only temacs
> is profiled.
> 

Thanks. The profiler works now nice.