Dear members,
I think I have a hint:
The doc says:
mc.cleanup
if set to TRUE then all children that have been forked by this
function will be killed (by sending SIGTERM) before this function returns.
Under normal circumstances mclapply waits for the children to deliver results,
so this option usually has only effect when mclapply is interrupted. If set to
FALSE then child processes are collected, but not forcefully terminated. As a
special case this argument can be set to the number of the signal that should
be used to kill the children instead of SIGTERM.
mc.allow.recursive
Unless true, calling mclapply in a child process will use the child and not
fork again.
I think the child processes are not killed. I think I have to use one or both
of the above arguments. Can you please shed some light on which one? ANd what
goes on under the hood?
THanking you,Yours sincerely,AKSHAY M KULKARNI
________________________________
From: R-help <r-help-boun...@r-project.org> on behalf of akshay kulkarni
<akshay...@hotmail.com>
Sent: Friday, June 9, 2023 11:31 PM
To: R help Mailing list <r-help@r-project.org>
Subject: [R] inconsistency in mclapply.....
Dear members,
I am using pbmcapply to parellise my code. But the
following code doesn't work:
> LYG <- pbmclapply(LYGH,FUN = arfima,mc.cores = 2,mc.preschedule = FALSE)
|
| 0%,
ETA NA^
It just hangs.
But the following works:
> LYG <- pbmclapply(LYGH,FUN = arfima,mc.cores = 2)
|==============================================================================================================================================|
100%, Elapsed 00:32
> LYG <- pbmclapply(LYGH,FUN = arfima,mc.cores = 2,mc.preschedule = FALSE)
|==============================================================================================================================================|
100%, Elapsed 00:52
Any idea on why mc.preschedule = FALSE works after the one without it?
Many thanks ...
THanking you,
Yours sincerely,
AKSHAY M KULKARNI
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
