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24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 #include "G4VUserMPIrunMerger.hh" 26 #include "G4VUserMPIrunMerger.hh"
27 << 27 #include <mpi.h>
28 #include "G4MPImanager.hh" <<
29 #include "G4MPIutils.hh" <<
30 <<
31 #include <algorithm> <<
32 #include <assert.h> 28 #include <assert.h>
>> 29 #include <algorithm>
33 #include <functional> 30 #include <functional>
34 #include <mpi.h> << 31 #include "G4MPIutils.hh"
35 32
36 G4VUserMPIrunMerger::G4VUserMPIrunMerger(const << 33 G4VUserMPIrunMerger::G4VUserMPIrunMerger( const G4Run* aRun ,
37 : outputBuffer(nullptr), << 34 G4int destination ,
38 outputBufferSize(0), << 35 G4int ver) :
39 outputBufferPosition(0), << 36 outputBuffer(nullptr),outputBufferSize(0),outputBufferPosition(0),
40 ownsBuffer(false), 37 ownsBuffer(false),
41 destinationRank(destination), << 38 destinationRank(destination),
42 run(const_cast<G4Run*>(aRun)), << 39 run(const_cast<G4Run*>(aRun)),
43 commSize(0), << 40 commSize(0),
44 verbose(ver), << 41 verbose(ver),
45 bytesSent(0) << 42 bytesSent(0) {}
46 {} << 43
47 << 44 #define DMSG( LVL , MSG ) { if ( verbose > LVL ) { G4cout << MSG << G4endl; } }
48 #define DMSG(LVL, MSG) \ <<
49 { \ <<
50 if (verbose > LVL) { \ <<
51 G4cout << MSG << G4endl; \ <<
52 } \ <<
53 } <<
54 45
55 void G4VUserMPIrunMerger::Send(const unsigned 46 void G4VUserMPIrunMerger::Send(const unsigned int destination)
56 { 47 {
57 assert(run != nullptr); << 48 assert(run!=nullptr);
58 G4int nevts = run->GetNumberOfEvent(); 49 G4int nevts = run->GetNumberOfEvent();
59 DMSG(1, "G4VUserMPIrunMerger::Send() : Sendi << 50 DMSG( 1 , "G4VUserMPIrunMerger::Send() : Sending a G4run ("
60 << 51 <<run<<") with "<<nevts<<" events to: "<<destination);
61 input_userdata.clear(); 52 input_userdata.clear();
62 Pack(); // User code << 53 Pack();//User code
63 InputUserData(&nevts, MPI::INT, 1); << 54 InputUserData(&nevts,MPI::INT,1);
64 55
65 DestroyBuffer(); 56 DestroyBuffer();
66 G4int newbuffsize = 0; 57 G4int newbuffsize = 0;
67 for (const const_registered_data& el : input << 58 for ( const const_registered_data& el : input_userdata ) {
68 newbuffsize += (el.dt.Get_size() * el.coun << 59 newbuffsize += (el.dt.Get_size()*el.count);
69 } 60 }
70 char* buffer = new char[newbuffsize]; 61 char* buffer = new char[newbuffsize];
71 // Avoid complains from valgrind (i'm not re << 62 //Avoid complains from valgrind (i'm not really sure why this is needed, but, beside the
72 // small cpu penalty, we can live with that) << 63 //small cpu penalty, we can live with that).)
73 std::fill(buffer, buffer + newbuffsize, 0); << 64 std::fill(buffer,buffer+newbuffsize,0);
74 ownsBuffer = true; << 65 ownsBuffer=true;
75 SetupOutputBuffer(buffer, newbuffsize, 0); << 66 SetupOutputBuffer(buffer,newbuffsize,0);
76 DMSG(3, "Buffer size: " << newbuffsize << " << 67 DMSG(3,"Buffer size: "<<newbuffsize<<" bytes at: "<<(void*)outputBuffer);
77 68
78 // Now userdata contains all data to be send << 69 //Now userdata contains all data to be send, do the real packing
79 for (const const_registered_data& el : input << 70 for ( const const_registered_data& el : input_userdata ) {
80 #ifdef G4MPI_USE_MPI_PACK_NOT_CONST 71 #ifdef G4MPI_USE_MPI_PACK_NOT_CONST
81 MPI_Pack(const_cast<void*>(el.p_data), el. << 72 MPI_Pack(const_cast<void*>(el.p_data),el.count,el.dt,
82 #else 73 #else
83 MPI_Pack(el.p_data, el.count, el.dt, << 74 MPI_Pack(el.p_data,el.count,el.dt,
84 #endif 75 #endif
85 outputBuffer, outputBufferSize, & << 76 outputBuffer,outputBufferSize,
>> 77 &outputBufferPosition,COMM_G4COMMAND_);
86 } 78 }
87 assert(outputBufferSize == outputBufferPosit << 79 assert(outputBufferSize==outputBufferPosition);
88 COMM_G4COMMAND_.Send(outputBuffer, outputBuf << 80 COMM_G4COMMAND_.Send(outputBuffer , outputBufferSize , MPI::PACKED ,
89 G4MPImanager::kTAG_RUN) << 81 destination , G4MPImanager::kTAG_RUN);
90 bytesSent += outputBufferSize; << 82 bytesSent+=outputBufferSize;
91 DMSG(2, "G4VUserMPIrunMerger::Send() : Done << 83 DMSG(2 , "G4VUserMPIrunMerger::Send() : Done ");
92 } 84 }
93 85
>> 86
94 void G4VUserMPIrunMerger::Receive(const unsign 87 void G4VUserMPIrunMerger::Receive(const unsigned int source)
95 { 88 {
96 const MPI::Intracomm* parentComm = G4MPImana << 89 DMSG( 1 , "G4VUserMPIrunMerger::Receive(...) , this rank : "
97 DMSG(1, "G4VUserMPIrunMerger::Receive(...) , << 90 <<MPI::COMM_WORLD.Get_rank()<<" and receiving from : "<<source);
98 << 91 //DestroyBuffer();
99 // DestroyBuffer(); << 92 //Receive from all but one
100 // Receive from all but one << 93 //for (G4int rank = 0; rank < commSize-1; ++rank)
101 // for (G4int rank = 0; rank < commSize-1; + << 94 //{
102 //{ << 95 MPI::Status status;
103 MPI::Status status; << 96 COMM_G4COMMAND_.Probe(source, G4MPImanager::kTAG_RUN, status);
104 COMM_G4COMMAND_.Probe(source, G4MPImanager:: << 97 //const G4int source = status.Get_source();
105 // const G4int source = status.Get_source(); << 98 const G4int newbuffsize = status.Get_count(MPI::PACKED);
106 const G4int newbuffsize = status.Get_count(M << 99 DMSG(2,"Preparing to receive buffer of size: "<<newbuffsize);
107 DMSG(2, "Preparing to receive buffer of size << 100 char* buffer = outputBuffer;
108 char* buffer = outputBuffer; << 101 if ( newbuffsize > outputBufferSize ) {
109 if (newbuffsize > outputBufferSize) { << 102 DMSG(3,"New larger buffer expected, resize");
110 DMSG(3, "New larger buffer expected, resiz << 103 //New larger buffer incoming, recreate buffer
111 // New larger buffer incoming, recreate bu << 104 delete[] outputBuffer;
112 delete[] outputBuffer; << 105 buffer = new char[newbuffsize];
113 buffer = new char[newbuffsize]; << 106 //Avoid complains from valgrind (i'm not really sure why this is needed, but, beside the
114 // Avoid complains from valgrind (i'm not << 107 //small cpu penalty, we can live with that).)
115 // small cpu penalty, we can live with tha << 108 std::fill(buffer,buffer+newbuffsize,0);
116 std::fill(buffer, buffer + newbuffsize, 0) << 109 ownsBuffer = true;
117 ownsBuffer = true; << 110 }
118 } << 111 SetupOutputBuffer(buffer,newbuffsize,0);
119 SetupOutputBuffer(buffer, newbuffsize, 0); << 112 COMM_G4COMMAND_.Recv(buffer, newbuffsize, MPI::PACKED,source,
120 COMM_G4COMMAND_.Recv(buffer, newbuffsize, MP << 113 G4MPImanager::kTAG_RUN, status);
121 DMSG(3, "Buffer Size: " << outputBufferSize << 114 DMSG(3,"Buffer Size: "<<outputBufferSize<< " bytes at: "<<(void*)outputBuffer);
122 output_userdata.clear(); << 115 output_userdata.clear();
123 // User code, if implemented will return the << 116 //User code, if implemented will return the concrete G4Run class
124 G4Run* aNewRun = UnPack(); << 117 G4Run* aNewRun = UnPack();
125 if (aNewRun == nullptr) aNewRun = new G4Run; << 118 if ( aNewRun == nullptr ) aNewRun = new G4Run;
126 // Add number of events counter << 119 //Add number of events counter
127 G4int nevets = 0; << 120 G4int nevets = 0;
128 OutputUserData(&nevets, MPI::INT, 1); << 121 OutputUserData(&nevets,MPI::INT,1);
129 // now userdata contains all data references << 122 //now userdata contains all data references, do the real unpacking
130 for (const registered_data& el : output_user << 123 for ( const registered_data& el : output_userdata ) {
131 MPI_Unpack(outputBuffer, outputBufferSize, << 124 MPI_Unpack(outputBuffer,outputBufferSize,&outputBufferPosition,
132 COMM_G4COMMAND_); << 125 el.p_data,el.count,el.dt,COMM_G4COMMAND_);
133 } << 126 }
134 for (G4int i = 0; i < nevets; ++i) << 127 for ( G4int i = 0 ; i<nevets ; ++i ) aNewRun->RecordEvent(nullptr);
135 aNewRun->RecordEvent(nullptr); << 128
136 << 129 //Now merge received MPI run with global one
137 // Now merge received MPI run with global on << 130 DMSG(2,"Before G4Run::Merge : "<<run->GetNumberOfEvent());
138 DMSG(2, "Before G4Run::Merge : " << run->Get << 131 run->Merge( aNewRun );
139 run->Merge(aNewRun); << 132 DMSG(2,"After G4Run::Merge : "<<run->GetNumberOfEvent());
140 DMSG(2, "After G4Run::Merge : " << run->GetN << 133 delete aNewRun;
141 delete aNewRun; << 134 //}
142 //} <<
143 } 135 }
144 136
145 void G4VUserMPIrunMerger::Merge() 137 void G4VUserMPIrunMerger::Merge()
146 { 138 {
147 // G4cout << "G4VUserMPIrunMerger::Merge cal <<
148 <<
149 DMSG(0, "G4VUserMPIrunMerger::Merge called") 139 DMSG(0, "G4VUserMPIrunMerger::Merge called");
150 const MPI::Intracomm* parentComm = G4MPImana << 140 const unsigned int myrank = MPI::COMM_WORLD.Get_rank();
151 const unsigned int myrank = parentComm->Get_ << 141 commSize = MPI::COMM_WORLD.Get_size();
152 commSize = G4MPImanager::GetManager()->GetAc << 142 if ( commSize == 1 ) {
153 // do not include extra worker in this commu << 143 DMSG(1,"Comm world size is 1, nothing to do");
154 << 144 return;
155 if (commSize == 1) { <<
156 DMSG(1, "Comm world size is 1, nothing to <<
157 return; <<
158 } 145 }
159 COMM_G4COMMAND_ = parentComm->Dup(); << 146 COMM_G4COMMAND_ = MPI::COMM_WORLD.Dup();
160 bytesSent = 0; 147 bytesSent = 0;
161 const G4double sttime = MPI::Wtime(); 148 const G4double sttime = MPI::Wtime();
162 149
163 // Use G4MPIutils to optimize communications << 150 //Use G4MPIutils to optimize communications between ranks
164 typedef std::function<void(unsigned int)> ha 151 typedef std::function<void(unsigned int)> handler_t;
165 using std::placeholders::_1; 152 using std::placeholders::_1;
166 handler_t sender = std::bind(&G4VUserMPIrunM << 153 handler_t sender = std::bind(&G4VUserMPIrunMerger::Send , this , _1);
167 handler_t receiver = std::bind(&G4VUserMPIru 154 handler_t receiver = std::bind(&G4VUserMPIrunMerger::Receive, this, _1);
168 std::function<void(void)> barrier = std::bin << 155 std::function<void(void)> barrier =
169 // G4cout << "go to G4mpi::Merge" << G4endl << 156 std::bind(&MPI::Intracomm::Barrier,&COMM_G4COMMAND_);
170 G4mpi::Merge(sender, receiver, barrier, comm << 157 G4mpi::Merge( sender , receiver , barrier , commSize , myrank );
171 << 158
172 // OLD Style p2p communications << 159 //OLD Style p2p communications
173 /* << 160 /*
174 if ( myrank != destinationRank ) { << 161 if ( myrank != destinationRank ) {
175 DMSG(0,"Comm world size: "<<commSize<< << 162 DMSG(0,"Comm world size: "<<commSize<<" this rank is: "
176 <<myrank<<" sending to rank "<<de << 163 <<myrank<<" sending to rank "<<destinationRank);
177 Send(destinationRank); << 164 Send(destinationRank);
178 } else { << 165 } else {
179 DMSG(1,"Comm world size: "<<commSize<< << 166 DMSG(1,"Comm world size: "<<commSize<<" this rank is: "
180 <<myrank<<" receiving. "); << 167 <<myrank<<" receiving. ");
181 for ( unsigned int i = 0 ; i<commSize << 168 for ( unsigned int i = 0 ; i<commSize ; ++i) {
182 if ( i != myrank ) Receive(i); << 169 if ( i != myrank ) Receive(i);
183 } << 170 }
184 } << 171 }
185 */ << 172 */
>> 173
186 const G4double elapsed = MPI::Wtime() - stti 174 const G4double elapsed = MPI::Wtime() - sttime;
187 long total = 0; << 175 long total=0;
188 COMM_G4COMMAND_.Reduce(&bytesSent, &total, 1 << 176 COMM_G4COMMAND_.Reduce(&bytesSent,&total,1,MPI::LONG,MPI::SUM,
189 if (verbose > 0 && myrank == destinationRank << 177 destinationRank);
190 // Collect from ranks how much data was se << 178 if ( verbose > 0 && myrank == destinationRank ) {
191 G4cout << "G4VUserMPIrunMerger::Merge() - << 179 //Collect from ranks how much data was sent around
192 << double(total) / 1000. / elapsed << 180 G4cout<<"G4VUserMPIrunMerger::Merge() - data transfer performances: "
193 << " (Total Data Transfer= " << dou << 181 <<double(total)/1000./elapsed<<" kB/s"
194 << G4endl; << 182 <<" (Total Data Transfer= "<<double(total)/1000<<" kB in "
>> 183 <<elapsed<<" s)."<<G4endl;
195 } 184 }
196 185
>> 186
>> 187
197 COMM_G4COMMAND_.Free(); 188 COMM_G4COMMAND_.Free();
198 DMSG(0, "G4VUserMPIrunMerger::Merge done"); << 189 DMSG(0,"G4VUserMPIrunMerger::Merge done");
199 } 190 }
>> 191
200 192