[R-sig-hpc] Rmpi: mpi.close.Rslaves() 'hangs'

[Ei-ji Nakama]

Hi,

2017-09-28 15:48 GMT+09:00 Marius Hofert <marius.hofert at uwaterloo.ca>:
> If I execute the minimal working example with this new
> mpi.close.Rslave2() at the end, something strange happens: *While*
> doing the computation, 'htop' doesn't show the two cores separately,
> but *after* executing it, the two cores show up and I need to manually
> 'kill -9 <PID>' them.
>
> Any ideas?

Look at the modifications made to Rmpi/inst/slavedaemon.R
MPI_Comm_disconnect is looping even on slave ...

> On Thu, Sep 28, 2017 at 6:55 AM, Ei-ji Nakama <nakama at ki.rim.or.jp> wrote:
>> diff -ruN Rmpi.orig/inst/slavedaemon.R Rmpi/inst/slavedaemon.R
>> --- Rmpi.orig/inst/slavedaemon.R    2013-02-23 13:07:54.000000000 +0900
>> +++ Rmpi/inst/slavedaemon.R    2017-09-28 11:45:19.598288064 +0900
>> @@ -16,6 +16,9 @@
>>  repeat
>>      try(eval(mpi.bcast.cmd(rank=0,comm=.comm, nonblock=.nonblock,
>> sleep=.sleep),envir=.GlobalEnv),TRUE)
>>  print("Done")
>> -invisible(mpi.comm.disconnect(.comm))
>> +if(Sys.getenv("PMIX_NAMESPACE")=="")
>> +    invisible(mpi.comm.disconnect(.comm))
>> +else
>> +    invisible(mpi.comm.free(.comm))
>>  invisible(mpi.comm.set.errhandler(0))
>>  mpi.quit()

-- 
Best Regards,
--
Eiji NAKAMA <nakama (a) ki.rim.or.jp>
"\u4e2d\u9593\u6804\u6cbb"  <nakama (a) ki.rim.or.jp>