[Gretl-devel] Re: MPI issue
On Tue, 13 Aug 2019, Marcin Błażejowski wrote:
On 13.08.2019 12:09, Riccardo (Jack) Lucchetti wrote:
> On Tue, 13 Aug 2019, Marcin Błażejowski wrote:
>
>> Hi,
>>
>> what such an error means (haavelmo machine, MPI in 20 threads):
>
> Just for the record: "haavelmo" is a server at UnivPM I gave Marcin
> access to for the purpose of testing MPI-related stuff (In case you
> people were wondering!).
It looks like the problem with concurent access to the file. I solved
the issue, but the solution is quite numb:
##########################
loop i=0..$mpisize-1 --quiet
if ($mpirank == i)
MODEL = bread("MODEL")
else
sleep(1)
endif
endloop
##########################
Hmm, that's a bit puzzling. Deserializing a bundle from file involves
calling xmlParseFile() from libxml2, then working on the document tree
in memory. It's a read-only operation, so far as I know, so I'm not
sure why there would be a contention issue.
Possibly relevant questions: Is the bundle file gzipped or just plain
XML? How/when is the bundle file created?
Allin