[erlang-questions] Erlang/OTP 18.0 has been released

Max Lapshin max.lapshin@REDACTED
Fri Jun 26 19:09:10 CEST 2015

Steve, sorry for mispelling.

I will try r18 asap and tell how it works.

On Friday, June 26, 2015, Steve Vinoski <vinoski@REDACTED> wrote:

> On Fri, Jun 26, 2015 at 9:03 AM, Max Lapshin <max.lapshin@REDACTED
> <javascript:_e(%7B%7D,'cvml','max.lapshin@REDACTED');>> wrote:
>> Is the patch by Steve Vinosky included in this release?
> s/Vinosky/Vinoski/
> We still experience big problems with dirty schedulers on 17.4 in our
>> ffmpeg needs.
> My patch for the problem you saw (commit b7c9657) was never applied to
> 17.x, though it could be if the OTP team wanted to do that. But it is
> included in 18.0. Are you seeing similar problems with 18.0?
>> By the way, it seems to be very uneasy to enable  runtime switch between
>> dirty and non-dirty schedulers in NIF, because it requires
>> expanding ERL_NIF_INIT macro. Is there any easy way to do it?
> Dirty schedulers don't affect the ERL_NIF_INIT macro, but I think what
> you're referring to is the ErlNifFunc struct type, which was extended with
> an extra flags field for dirty schedulers (and perhaps other future uses).
> But you need not use that flags field to specify dirty scheduling -- you
> could instead specify in your ErlNifFunc a regular nif that schedules the
> call over to a dirty scheduler at runtime by checking enif_system_info,
> like this:
>     ErlNifSysInfo si;
>     enif_system_info(&si, sizeof(si));
>     if (si.dirty_scheduler_support)
>         enif_schedule_nif(env, "dirty_nif", ERL_NIF_DIRTY_JOB_CPU_BOUND,
> dirty_nif, argc, argv);
>     else
>         /* run the function as a regular NIF or in your own thread pool */
> This is slower than using the flags field, but the overhead is in the
> noise for typical applications.
> --steve
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