[Caml-list] how to compile ocamlc.opt with profiling turned on?

[Caml-list] how to compile ocamlc.opt with profiling turned on?

[Norman Ramsey]

Dear Camllists,

We're seeing some long compile times from ocamlc and ocamlc.opt.
I would like to try to identify in what part of the compiler the
time is being spent, so for the last hour I have been trying to
compile ocamlc.opt with 'ocamlopt -p' so that I can profile the compiler.
But I have not been able to figure out how to do this.

  make CAMLOPT='ocamlopt -p -nostdlib -I stdlib' opt.opt

does not seem to work.

Can anyone advise me how to build an ocamlc.opt that I can profile
with gprof?


Norman



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Re: [Caml-list] how to compile ocamlc.opt with profiling turned on?

[Xavier Leroy]

> We're seeing some long compile times from ocamlc and ocamlc.opt.
> I would like to try to identify in what part of the compiler the
> time is being spent, so for the last hour I have been trying to
> compile ocamlc.opt with 'ocamlopt -p' so that I can profile the compiler.
> But I have not been able to figure out how to do this.
> 
>   make CAMLOPT='ocamlopt -p -nostdlib -I stdlib' opt.opt
> 
> does not seem to work.

You're on the right tracks.  The following seems to work:

        make world opt
        (cd stdlib; ln -s ../asmrun/libasmrunp.a . )
        make CAMLOPT="boot/ocamlrun ./ocamlopt -nostdlib -I stdlib -p" \
          ocamlc.opt ocamlopt.opt

Hope this helps,

- Xavier

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Re: [Caml-list] how to compile ocamlc.opt with profiling turned on?

[Chet Murthy]

Norman,

use Ocamlmakefile.  Ocamlmakefile is your FRIEND.

you change the TARGETS from "nc" (== "native code") to "pnc" (==
"profiled native code") and you're done.

Ocamlmakefile.  -almost- as great as sliced bread.  But Perl's already
got that nailed.  Or was it ... ethereal.  Yep, that's it.  Ethereal,
now, -that's- sliced bread.  Maybe even fire.

--chet--

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