zhyang-dev/openfoam
1
0
Fork 0
mirror of https://develop.openfoam.com/Development/openfoam.git synced 2025-11-28 03:28:01 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

ENH: additional control and access methods for PstreamBuffers

Browse Source 
- PstreamBuffers nProcs() and allProcs() methods to recover the rank
  information consistent with the communicator used for construction

- allowClearRecv() methods for more control over buffer reuse
  For example,

      pBufs.allowClearRecv(false);

      forAll(particles, particlei)
      {
          pBufs.clear();

          fill...

          read via IPstream(..., pBufs);
       }

  This preserves the receive buffers memory allocation between calls.

- finishedNeighbourSends() method as compact wrapper for
  finishedSends() when send/recv ranks are identically
  (eg, neighbours)

- hasSendData()/hasRecvData() methods for PstreamBuffers.

  Can be useful for some situations to skip reading entirely.
  For example,

      pBufs.finishedNeighbourSends(neighProcs);

      if (!returnReduce(pBufs.hasRecvData(), orOp<bool>()))
      {
          // Nothing to do
          continue;
      }
      ...

  On an individual basis:

      for (const int proci : pBufs.allProcs())
      {
          if (pBufs.hasRecvData(proci))
          {
             ...
          }
      }

  Also conceivable to do the following instead (nonBlocking only):

      if (!returnReduce(pBufs.hasSendData(), orOp<bool>()))
      {
          // Nothing to do
          pBufs.clear();
          continue;
      }

      pBufs.finishedNeighbourSends(neighProcs);
      ...
This commit is contained in:
Mark Olesen
2022-02-28 13:31:52 +01:00
committed by Andrew Heather
parent bfca84d11a
commit 14631984df
20 changed files with 411 additions and 141 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
src/functionObjects/utilities/syncObjects/syncObjects.C
View File

@ -5,7 +5,7 @@
\\ / A nd | www.openfoam.com
\\/ M anipulation |
-------------------------------------------------------------------------------
Copyright (C) 2020-2021 OpenCFD Ltd.
Copyright (C) 2020-2022 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -96,8 +96,7 @@ void Foam::functionObjects::syncObjects::sync()
);
const label nProcs = Pstream::nProcs(pBufs.comm());
for (label proci = 0; proci < nProcs; proci++)
for (const int proci : pBufs.allProcs())
{
// Get database to send
const objectRegistry& sendObr = mappedPatchBase::subRegistry
@ -123,7 +122,7 @@ void Foam::functionObjects::syncObjects::sync()
// Start sending and receiving and block
pBufs.finishedSends();
for (label proci = 0; proci < nProcs; proci++)
for (const int proci : pBufs.allProcs())
{
// Get database to receive data into
const objectRegistry& receiveObr = mappedPatchBase::subRegistry