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[RFA] better igc up-to-date-ness tracking, optimized igc communication
From: |
Richard Guenther |
Subject: |
[RFA] better igc up-to-date-ness tracking, optimized igc communication |
Date: |
Fri, 23 Jul 2004 14:10:40 +0200 (CEST) |
As a proof of concept the attached patch implements more accurate tracking
of which igc cells are up-to-date to reduce communication. It also
implements a new GuardSend/Receive iterate for the POOMA_MPI case which
is able to merge consecutive igc updates by using a global std::map for
bookkeeping (yay!).
A new test Array/tests/array_test30.cpp tries to completely cover all
possible cases of igc updates and passes in serial mode and in MPI mode
for 1 process and #processes == #patches. For mixed remote/local updates
there seems to be a problem, thus this is RFA and not a patch submission.
Please look at it, tell me how to avoid the global std::map (or if it is
ok), test it with your favorite application, etc. I'll be away for
holidays for a few weeks now.
Richard.
2004Jul23 Richard Guenther <address@hidden>
* src/Engine/MultiPatchEngine.h: abstract the dirty flag
and record partial up-to-date-ness via a GuardLayer object.
(setDirty): for POOMA_MPI mode clear the global hash.
src/Engine/MultiPatchEngine.cpp: handle the abstract dirty
flag.
(simpleAssign): add optimized mode using the new GuardSend
and GuardReceive iterates for POOMA_MPI.
(fillGuardsHandler): honour partial up-to-date information,
produce partial update domains.
src/Layout/GuardLayers.h: abstract from the data-type,
add operator>=.
src/Threads/IterateSchedulers/SerialAsync.h
(waitForSomeRequests): fix bug for non-blocking operation.
(runSomething): always complete complete message iterates.
src/Tulip/SendReceive.h: add GuardSend and GuardReceive
iterates that are able to merge with consecutive iterates
using a global std::map.
src/Array/tests/array_test30.cpp: new.
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