[erlang-questions] "Fat" BEAMs?

Thomas Lindgren <>
Fri Oct 11 08:19:17 CEST 2013


I should also add that Frej Drejhammar's work on a tracing JIT emulator would enable cross-module inlining etc in a somewhat different context, so it will be quite interesting to see what comes from that. I've only seen a couple of conference presentations yet, looking forward to more.

Best,
Thomas



On Friday, October 11, 2013 8:09 AM, Thomas Lindgren <> wrote:
 
Hi Olivier,
>
>
>Regarding cross-module optimization and inlining, have a look at these:
>
>
>http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.21.4909
>
>http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.2.6496
>
>
>
>Appendix A of the second paper made me realize how much work is going on inside mnesia. For one benchmark, that algorithm decided to inline mnesia:dirty_write/2 something like 10 levels deep through 8 modules, resulting in a 1000-line function. The whole topic needs more work though.
>
>
>Best,
>Thomas
>
>
>
>On Thursday, October 10, 2013 1:23 PM, Olivier BOUDEVILLE <> wrote:
> 
>Indeed! Additionally, it is quite recent.  
>>
>>It could be interesting to measure the
speed-up that can actually be obtained, possibly in various settings (native
or not, with the various compilers, etc.); maybe this could also allow
to have Erlang shine a bit more in some benchmarks!
>> 
>>Thanks for the pointer (will definitively
try it), 
>>
>>Olivier.
>>---------------------------
>>Olivier Boudeville
>>
>>EDF R&D : 1, avenue du Général de Gaulle, 92140 Clamart, France
>>Département SINETICS, groupe ASICS (I2A), bureau B-226
>>Office : +33 1 47 65 59 58 / Mobile : +33 6 16 83 37 22 / Fax : +33 1 47
65 27 13 
>>
>>
>>
>>  
>>10/10/2013 12:34  A   
>>cc   
>>Objet Re: [erlang-questions] "Fat"
BEAMs? 
>>  
>> 
>>
>>
>>Maybe give https://github.com/tonyrog/inlinea try? 
>>
>>/Tony 
>>
>>On 10 okt 2013, at 11:56, Olivier BOUDEVILLE <>
wrote: 
>>
>>Hi,
>>
>>Let's suppose that, thanks to a parse-transform, we fetched recursively
from other modules most if not all code explicitly callable from a given
module, so that the full code (ultimately calling only basic language constructs
and BIFs) ends up in a single (presumably big, unfolded, possibly inlined)
AST. 
>>
>>Then, in  the prospect of native compilation (HiPe, possibly others
like ErLLVM), I imagine that not only we should get rid of the overhead
of inter-module calls, but we would also give to the compiler the best
full view on which it could operate and generate the best code it could
manage?
>>
>>Has this approach already been attempted? Would it have some potential
interest?
>>
>>Thanks in advance for any hint,
>>Best regards,
>>
>>Olivier.
>>---------------------------
>>Olivier Boudeville
>>
>>EDF R&D : 1, avenue du Général de Gaulle, 92140 Clamart, France
>>Département SINETICS, groupe ASICS (I2A), bureau B-226
>>Office : +33 1 47 65 59 58 / Mobile : +33 6 16 83 37 22 / Fax : +33 1 47
65 27 13 
>>
>>
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