Threads in rubinius

[Twin Primes]

Hi,

Just downloaded, and tried rubinius. Threads seem to be running rather
slowly. Do I need
to set some config option to get threads to run at full speed ? (The
way I can tell is that the
CPU monitors for my 2 cores jump from 800MHz to 1.6GHz but not to the
full 2.2GHz; JRuby
does seem to run the threads at full speed).

My program creates 2 slave threads and sends CPU intensive tasks to
them from the main
thread.

Thanks for any insight.

[Chuck Remes]

It would be best if you could share the code in question.

Without knowing exactly what you are doing, I can only guess. I *guess* that your threads are I/O bound. If they are blocking on I/O then you won't see a CPU spike.

Show us the code or come visit in IRC again. Alternately, run your program with -Xprofile -Xprofiler.graph and put the results in a pastie/gist.

cr

[Tony Arcieri]

On Mon, Nov 15, 2010 at 10:50 PM, Twin Primes <amber...@gmail.com> wrote:

JRuby
does seem to run the threads at full speed).

My program creates 2 slave threads and sends CPU intensive tasks to
them from the main
thread.

Rubinius has a Global Interpreter Lock which prevents two threads from executing Ruby code concurrently. JRuby does not.

This is going to be removed in a future version of Rubinius.

 

--
Tony Arcieri
Medioh! A Kudelski Brand

[Chuck Remes]

Geez, I forgot about this. I've been playing with the hydra branch (GIL is removed) and forgot it wasn't the master that everyone else is using. Oops.

cr