[erlang-questions] erlang smp on aix

Robert Virding robert.virding@REDACTED
Thu Sep 1 14:17:23 CEST 2011

Which version of Erlang ? 

----- Original Message -----

> hi

> we have a application used to run on centos but now we want to
> migrate it to AIX. During the test on Aix, we found the cpu scaling
> of the system is quite disappointing. With 8 cores and erlang smp
> auto, there were very high system cpu consumption and lots of
> thread_wait_lock call in the truss(strace) log, which would not
> appear on centos under the same test scenario. And the sys call will
> disappear if we turn smp off.
> So we guess there is something wrong with smp on Aix, perhaps caused
> by the schedulers switching. But we don't know where the
> thread_wait_call is from and what it is for.
> By the way, it is quite strange that the smp description of erl shell
> would be smp32:8 with smp auto on the 8 cores aix.
> Is there any hint to fix the problem? Appreciate your help.
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