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Revert barriers -- these were not the problem

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This commit is contained in:
Peter Boyle 2024-10-10 22:03:29 +00:00
parent 68f112d576
commit be7a543e2c
1 changed files with 9 additions and 6 deletions
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15
Grid/stencil/Stencil.h
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@ -364,9 +364,10 @@ public:
////////////////////////////////////////////////////////////////////////
void CommunicateBegin(std::vector<std::vector<CommsRequest_t> > &reqs)
{
FlightRecorder::StepLog("Communicate begin");
// All GPU kernel tasks must complete
accelerator_barrier(); // All kernels should ALREADY be complete
_grid->StencilBarrier(); // Everyone is here, so noone running slow and still using receive buffer
// accelerator_barrier(); // All kernels should ALREADY be complete
// _grid->StencilBarrier(); // Everyone is here, so noone running slow and still using receive buffer
// But the HaloGather had a barrier too.
for(int i=0;i<Packets.size();i++){
_grid->StencilSendToRecvFromBegin(MpiReqs,
@ -386,18 +387,20 @@ public:
void CommunicateComplete(std::vector<std::vector<CommsRequest_t> > &reqs)
{
FlightRecorder::StepLog("Start communicate complete");
_grid->StencilSendToRecvFromComplete(MpiReqs,0); // MPI is done
if ( this->partialDirichlet ) DslashLogPartial();
else if ( this->fullDirichlet ) DslashLogDirichlet();
else DslashLogFull();
acceleratorCopySynchronise();// is in the StencilSendToRecvFromComplete
accelerator_barrier();
// acceleratorCopySynchronise();// is in the StencilSendToRecvFromComplete
// accelerator_barrier();
_grid->StencilBarrier();
// run any checksums
for(int i=0;i<Packets.size();i++){
if ( Packets[i].do_recv )
FlightRecorder::recvLog(Packets[i].recv_buf,Packets[i].rbytes,Packets[i].from_rank);
}
FlightRecorder::StepLog("Finish communicate complete");
}
////////////////////////////////////////////////////////////////////////
// Blocking send and receive. Either sequential or parallel.
@ -473,7 +476,7 @@ public:
template<class compressor>
void HaloGather(const Lattice<vobj> &source,compressor &compress)
{
accelerator_barrier();
// accelerator_barrier();
_grid->StencilBarrier();// Synch shared memory on a single nodes
assert(source.Grid()==_grid);
@ -487,7 +490,7 @@ public:
HaloGatherDir(source,compress,point,face_idx);
}
accelerator_barrier(); // All my local gathers are complete
_grid->StencilBarrier();// Synch shared memory on a single nodes
// _grid->StencilBarrier();// Synch shared memory on a single nodes
face_table_computed=1;
assert(u_comm_offset==_unified_buffer_size);
}