1 /* Copyright (c) 2007-2019. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #include "smpi_comm.hpp"
8 #include "smpi_coll.hpp"
9 #include "smpi_datatype.hpp"
10 #include "smpi_info.hpp"
11 #include "smpi_win.hpp"
12 #include "smpi_request.hpp"
14 //setup here, because we have templates in smpi_file we want to log
15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_io, smpi, "Logging specific to SMPI (RMA operations)");
17 #include "smpi_file.hpp"
18 #include "smpi_status.hpp"
19 #include "simgrid/plugins/file_system.h"
21 #define FP_SIZE sizeof(MPI_Offset)
27 File::File(MPI_Comm comm, char *filename, int amode, MPI_Info info): comm_(comm), flags_(amode), info_(info) {
28 file_= new simgrid::s4u::File(filename, nullptr);
30 if (comm_->rank() == 0) {
31 int size= comm_->size() + FP_SIZE;
32 list_ = new char[size];
33 memset(list_, 0, size);
34 shared_file_pointer_ = new MPI_Offset[1];
35 shared_mutex_ = s4u::Mutex::create();
36 *shared_file_pointer_ = 0;
37 win_=new Win(list_, size, 1, MPI_INFO_NULL, comm_);
39 win_=new Win(list_, 0, 1, MPI_INFO_NULL, comm_);
41 simgrid::smpi::Colls::bcast(&shared_file_pointer_, 1, MPI_AINT, 0, comm);
42 simgrid::smpi::Colls::bcast(&shared_mutex_, 1, MPI_AINT, 0, comm);
43 if(comm_->rank() != 0)
44 intrusive_ptr_add_ref(&*shared_mutex_);
51 int File::close(MPI_File *fh){
52 XBT_DEBUG("Closing MPI_File %s", (*fh)->file_->get_path());
54 if((*fh)->flags() & MPI_MODE_DELETE_ON_CLOSE)
55 (*fh)->file_->unlink();
60 int File::del(char *filename, MPI_Info info){
61 //get the file with MPI_MODE_DELETE_ON_CLOSE and then close it
62 File* f = new File(MPI_COMM_SELF,filename,MPI_MODE_DELETE_ON_CLOSE|MPI_MODE_RDWR, nullptr);
67 int File::get_position(MPI_Offset* offset){
68 *offset=file_->tell();
72 int File::get_position_shared(MPI_Offset* offset){
73 shared_mutex_->lock();
74 *offset=*shared_file_pointer_;
75 shared_mutex_->unlock();
79 int File::seek(MPI_Offset offset, int whence){
82 XBT_VERB("Seeking in MPI_File %s, setting offset %lld", file_->get_path(), offset);
83 file_->seek(offset,SEEK_SET);
86 XBT_VERB("Seeking in MPI_File %s, current offset + %lld", file_->get_path(), offset);
87 file_->seek(offset,SEEK_CUR);
90 XBT_VERB("Seeking in MPI_File %s, end offset + %lld", file_->get_path(), offset);
91 file_->seek(offset,SEEK_END);
99 int File::seek_shared(MPI_Offset offset, int whence){
100 shared_mutex_->lock();
102 *shared_file_pointer_=offset;
103 shared_mutex_->unlock();
107 int File::read(MPI_File fh, void *buf, int count, MPI_Datatype datatype, MPI_Status *status){
108 //get position first as we may be doing non contiguous reads and it will probably be updated badly
109 MPI_Offset position = fh->file_->tell();
110 MPI_Offset movesize = datatype->get_extent()*count;
111 MPI_Offset readsize = datatype->size()*count;
112 XBT_DEBUG("Position before read in MPI_File %s : %llu",fh->file_->get_path(),fh->file_->tell());
113 MPI_Offset read = fh->file_->read(readsize);
114 XBT_VERB("Read in MPI_File %s, %lld bytes read, readsize %lld bytes, movesize %lld", fh->file_->get_path(), read, readsize, movesize);
115 if(readsize!=movesize){
116 fh->file_->seek(position+movesize, SEEK_SET);
118 XBT_VERB("Position after read in MPI_File %s : %llu",fh->file_->get_path(), fh->file_->tell());
119 status->count=count*datatype->size();
123 /*Ordered and Shared Versions, with RMA-based locks : Based on the model described in :*/
124 /* @InProceedings{10.1007/11557265_15,*/
125 /* author="Latham, Robert and Ross, Robert and Thakur, Rajeev and Toonen, Brian",*/
126 /* title="Implementing MPI-IO Shared File Pointers Without File System Support",*/
127 /* booktitle="Recent Advances in Parallel Virtual Machine and Message Passing Interface",*/
129 /* publisher="Springer Berlin Heidelberg",*/
130 /* address="Berlin, Heidelberg",*/
133 int File::read_shared(MPI_File fh, void *buf, int count, MPI_Datatype datatype, MPI_Status *status){
134 fh->shared_mutex_->lock();
135 fh->seek(*(fh->shared_file_pointer_),MPI_SEEK_SET);
136 read(fh, buf, count, datatype, status);
137 *(fh->shared_file_pointer_)=fh->file_->tell();
138 fh->shared_mutex_->unlock();
142 int File::read_ordered(MPI_File fh, void *buf, int count, MPI_Datatype datatype, MPI_Status *status){
143 //0 needs to get the shared pointer value
145 if(fh->comm_->rank()==0){
146 val=*(fh->shared_file_pointer_);
148 val=count*datatype->size();
152 simgrid::smpi::Colls::scan(&val, &result, 1, MPI_OFFSET, MPI_SUM, fh->comm_);
153 fh->seek(result, MPI_SEEK_SET);
154 int ret = fh->op_all<simgrid::smpi::File::read>(buf, count, datatype, status);
155 if(fh->comm_->rank()==fh->comm_->size()-1){
156 fh->shared_mutex_->lock();
157 *(fh->shared_file_pointer_)=fh->file_->tell();
158 fh->shared_mutex_->unlock();
161 simgrid::smpi::Colls::bcast(&c, 1, MPI_BYTE, fh->comm_->size()-1, fh->comm_);
165 int File::write(MPI_File fh, void *buf, int count, MPI_Datatype datatype, MPI_Status *status){
166 //get position first as we may be doing non contiguous reads and it will probably be updated badly
167 MPI_Offset position = fh->file_->tell();
168 MPI_Offset movesize = datatype->get_extent()*count;
169 MPI_Offset writesize = datatype->size()*count;
170 XBT_DEBUG("Position before write in MPI_File %s : %llu",fh->file_->get_path(),fh->file_->tell());
171 MPI_Offset write = fh->file_->write(writesize);
172 XBT_VERB("Write in MPI_File %s, %lld bytes written, readsize %lld bytes, movesize %lld", fh->file_->get_path(), write, writesize, movesize);
173 if(writesize!=movesize){
174 fh->file_->seek(position+movesize, SEEK_SET);
176 XBT_VERB("Position after write in MPI_File %s : %llu",fh->file_->get_path(), fh->file_->tell());
177 status->count=count*datatype->size();
181 int File::write_shared(MPI_File fh, void *buf, int count, MPI_Datatype datatype, MPI_Status *status){
182 fh->shared_mutex_->lock();
183 fh->seek(*(fh->shared_file_pointer_),MPI_SEEK_SET);
184 write(fh, buf, count, datatype, status);
185 *(fh->shared_file_pointer_)=fh->file_->tell();
186 fh->shared_mutex_->unlock();
190 int File::write_ordered(MPI_File fh, void *buf, int count, MPI_Datatype datatype, MPI_Status *status){
191 //0 needs to get the shared pointer value
193 if(fh->comm_->rank()==0){
194 val=*(fh->shared_file_pointer_);
196 val=count*datatype->size();
199 simgrid::smpi::Colls::scan(&val, &result, 1, MPI_OFFSET, MPI_SUM, fh->comm_);
200 fh->seek(result, MPI_SEEK_SET);
201 int ret = fh->op_all<simgrid::smpi::File::write>(buf, count, datatype, status);
202 if(fh->comm_->rank()==fh->comm_->size()-1){
203 fh->shared_mutex_->lock();
204 *(fh->shared_file_pointer_)=fh->file_->tell();
205 fh->shared_mutex_->unlock();
208 simgrid::smpi::Colls::bcast(&c, 1, MPI_BYTE, fh->comm_->size()-1, fh->comm_);
213 return file_->size();
222 return simgrid::smpi::Colls::barrier(comm_);
225 MPI_Info File::info(){
226 if(info_== MPI_INFO_NULL)
232 void File::set_info(MPI_Info info){
233 if(info_!= MPI_INFO_NULL)