Randall :

> Can you explain how VECNODE is different from normal vectors and where it
> might be useful?
>
Vector uses on-node shared memory to store its entries.
http://www.mcs.anl.gov/petsc/documentation/changes/39.html

This is an experimental  work for using mpi3 support of shared memory. The
vector entries are stored in shared memory, allowing direct access by
on-node cores.
You must use it with VECSCATTERMPI3NODE.

where is might be useful?
It was developed as one algorithmic approach of mpi3 vecscatter. For some
tests, it accelerates vecscatter, but we have not seen practical impact to
Mat-vec operations. Let us know if anyone is interested in using our new
mpi3 vector scatters.

Hong

>
> > On Apr 9, 2018, at 11:22 PM, Smith, Barry F. <bsm...@mcs.anl.gov> wrote:
> >
> >
> >  PETSc users
> >
> > We are pleased to announce the release of PETSc version 3.9 at
> http://www.mcs.anl.gov/petsc
> >
> > The major changes and updates can be found at
> http://www.mcs.anl.gov/petsc/documentation/changes/39.html
> >
> > We recommend upgrading to PETSc 3.9 soon (the sooner you switch the more
> we can help you with the switch).
> >
> > As always, please report problems to  petsc-ma...@mcs.anl.gov and ask
> questions at petsc-users@mcs.anl.gov
> >
> > This release includes contributions from
> >
> > Adrian Croucher
> > Alejandro Lamas Daviña
> > Alp Dener
> > Barry Smith
> > Bernhard M. Wiedemann
> > Blaise Bourdin
> > Daniel Kokron
> > Dave May
> > David Wobrock
> > eaulisa
> > Fande Kong
> > Hong Zhang
> > Hong Zhang
> > Jakub Kruzik
> > Jed Brown
> > Jose E. Roman
> > Junchao Zhang
> > Karl Rupp
> > Lawrence Mitchell
> > Lisandro Dalcin
> > Mari Pecha
> > Mark Adams
> > Mark Lohry
> > Matthew G. Knepley
> > Nicolas Barral
> > Oana Marin
> > Patrick Sanan
> > Pieter Ghysels
> > Richard Tran Mills
> > Satish Balay
> > Scott Kruger
> > Shri Abhyankar
> > Siegfried Cools
> > Stefano Zampini
> > Thomas Mijieux
> > Toby Isaac
> > Todd Munson
> > Tristan Konolige
> > Václav Hapla
> >
> > and bug reports/patches/proposed improvements received from
> >
> > Adrian Croucher
> > Albert Cowie
> > "Alberto F. Martín"
> > Alp Dener
> > Antonio Trande
> > apostol
> > Barry Smith
> > "Charles A.(Sandy) Mader"
> > Daniele Tartarini
> > Danyang Su
> > Drew Parsons
> > Ed Bueler
> > Eric Chamberland
> > Eugenio Aulisa
> > Evan Um
> > Fabrice JURADO
> > Fadi El Haddad
> > Fande Kong
> > Febrian Setianto
> > Florian Lindner
> > Franck Houssen
> > Francois Pechereau
> > Garth N. Wells
> > GONG Ding
> > Greg Meyer
> > Henrik Buesing
> > Hong Zhang
> > Hong Zhang
> > ilya
> > Jaroslaw Piwonski
> > Jean Philippe François
> > Jed Brown
> > Jin Chen
> > Jørgen Dokken
> > Jose E. Roman
> > Karl Rupp
> > Keith Lindsay
> > "Klaij, Christiaan"
> > Lawrence Mitchell
> > Lisandro Dalcin
> > Manav Bhatia
> > Marco Schauer
> > Marius Buerkle
> > Mark Adams
> > Martin Diehl
> > Matthew Knepley
> > Matthieu Vitse
> > Michael Leguèbe
> > "Miller, Laniece E."
> > Oana Marin
> > Pablo Brubeck
> > Patrick Farrell
> > Patrick Sanan
> > Peter Meisrimel
> > Philip Eisenlohr
> > Pierre Jolivet
> > Praveen C
> > Rafael Monteiro da Silva
> > Randall Mackie
> > Randy Michael Churchill
> > Richard Tran Mills
> > Roland Richter
> > Samuel Lanthaler
> > Sanjay Govindjee
> > Satish Balay
> > Serge Van Criekingen
> > Stefano Zampini
> > Stephan Kramer
> > Syam Vangara
> > Tim Steinhoff
> > Tobias Goerler
> > Todd Munson
> > Tzanio Kolev
> > Victor Eijkhout
> > Vinh Pham-Xuan
> > Xiangdong
> > Xiaoye S. Li
> > Yiting  Wang
> >
> > As always, thanks for your support,
> >
> > Barry
> >
>
>

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