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Guest
Posted: Wed Feb 06, 2008 5:46 pm Reply with quote
Guest
Hi Tony,

Could you please recommend ./configure options for building Erlang R11B-5.

I noticed erl in your session reports "Erlang (BEAM) emulator version 5.5.5 [source]
[async-threads:30] [kernel-poll:true]", and mine says "Erlang (BEAM) emulator version
5.5.5 [source] [async-threads:0] [hipe] [kernel-poll:false]". Are these differences
significant? I built with "--prefix=/usr --disable-x".

BTW, Erlang R12B-1 is out today (Feb 6).

Thanks,
Dmitriy



Tony Garnock-Jones wrote:
> Hi all,
>
> I
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tonyg
Posted: Fri Feb 08, 2008 3:02 pm Reply with quote
User Joined: 07 Nov 2006 Posts: 199
Hi Dmitriy,

Dmitriy Samovskiy wrote:
> Could you please recommend ./configure options for building Erlang R11B-5.

I've really only ever tried "./configure --prefix=/opt/erlang", on my
Mac. Otherwise I use the stock Debian packages or Windows binaries.

> I noticed erl in your session reports "Erlang (BEAM) emulator version
> 5.5.5 [source] [async-threads:30] [kernel-poll:true]", and mine says
> "Erlang (BEAM) emulator version 5.5.5 [source] [async-threads:0] [hipe]
> [kernel-poll:false]". Are these differences significant? I built with
> "--prefix=/usr --disable-x".

The differences are interesting. The async-threads were something we
enabled to reduce the impact of blocking system calls for workloads
involving persistent messages, but since it's only a minor tweak for
performance enhancement in one case, it shouldn't matter if it's not
there usually.

The kernel-poll thing is I think an extension for more efficient IO
eventing from the kernel. Only a few operating systems support it.

What kind of platform are you building Erlang on?

> BTW, Erlang R12B-1 is out today (Feb 6).

Thanks for the tip! I'm looking forward to experimenting with it; for
now, we're still recommending R11B-5.

Regards,
Tony
--
[][][] Tony Garnock-Jones | Mob: +44 (0)7905 974 211
[][] LShift Ltd | Tel: +44 (0)20 7729 7060
[] [] http://www.lshift.net/ | Email: tonyg@lshift.net

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Guest
Posted: Fri Feb 08, 2008 7:45 pm Reply with quote
Guest
Hi Tony,

Tony Garnock-Jones wrote:
>> Could you please recommend ./configure options for building Erlang R11B-5.
>
> I've really only ever tried "./configure --prefix=/opt/erlang", on my
> Mac. Otherwise I use the stock Debian packages or Windows binaries.
>
>> I noticed erl in your session reports "Erlang (BEAM) emulator version
>> 5.5.5 [source] [async-threads:30] [kernel-poll:true]", and mine says
>> "Erlang (BEAM) emulator version 5.5.5 [source] [async-threads:0] [hipe]
>> [kernel-poll:false]". Are these differences significant? I built with
>> "--prefix=/usr --disable-x".
>
> The differences are interesting. The async-threads were something we
> enabled to reduce the impact of blocking system calls for workloads
> involving persistent messages, but since it's only a minor tweak for
> performance enhancement in one case, it shouldn't matter if it's not
> there usually.
>
I also use Debian. I found that I can make my erl behave more like one from your session
by calling it as "erl +K true +A 30" and rebuilding it with --disable-hipe. I will stick
with your defaults since I am new to Erlang. Please let us know if you find better
optimizations for running rabbitmq brokers.

Thanks for the explanation!

Dmitriy

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