-/* Copyright (c) 2010-2019. The SimGrid Team.
+/* Copyright (c) 2010-2023. The SimGrid Team.
* All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
#include "smpi_comm.hpp"
#include "smpi_coll.hpp"
#include "smpi_datatype.hpp"
+#include "smpi_errhandler.hpp"
#include "smpi_info.hpp"
#include <algorithm>
-XBT_LOG_EXTERNAL_CATEGORY(smpi_pmpi);
+XBT_LOG_EXTERNAL_CATEGORY(smpi_io);
-namespace simgrid{
-namespace smpi{
-class File{
+namespace simgrid::smpi {
+class File : public F2C{
MPI_Comm comm_;
int flags_;
simgrid::s4u::File* file_;
s4u::MutexPtr shared_mutex_;
MPI_Win win_;
char* list_;
+ MPI_Errhandler errhandler_;
+ MPI_Datatype etype_;
+ MPI_Datatype filetype_;
+ std::string datarep_;
+ MPI_Offset disp_;
+ bool atomicity_;
+
public:
- File(MPI_Comm comm, char *filename, int amode, MPI_Info info);
+ File(MPI_Comm comm, const char *filename, int amode, MPI_Info info);
File(const File&) = delete;
File& operator=(const File&) = delete;
- ~File();
- int size();
- int get_position(MPI_Offset* offset);
- int get_position_shared(MPI_Offset* offset);
- int flags();
+ ~File() override;
+ int size() const;
+ int get_position(MPI_Offset* offset) const;
+ int get_position_shared(MPI_Offset* offset) const;
+ int flags() const;
+ MPI_Datatype etype() const;
+ MPI_Comm comm() const;
+ std::string name() const override { return file_ ? "MPI_File: " + std::string(file_->get_path()) : "MPI_File"; }
+
int sync();
int seek(MPI_Offset offset, int whence);
int seek_shared(MPI_Offset offset, int whence);
+ int set_view(MPI_Offset disp, MPI_Datatype etype, MPI_Datatype filetype, const char* datarep, const Info* info);
+ int get_view(MPI_Offset* disp, MPI_Datatype* etype, MPI_Datatype* filetype, char* datarep) const;
MPI_Info info();
void set_info( MPI_Info info);
- static int read(MPI_File fh, void *buf, int count,MPI_Datatype datatype, MPI_Status *status);
- static int read_shared(MPI_File fh, void *buf, int count,MPI_Datatype datatype, MPI_Status *status);
- static int read_ordered(MPI_File fh, void *buf, int count,MPI_Datatype datatype, MPI_Status *status);
- static int write(MPI_File fh, void *buf, int count,MPI_Datatype datatype, MPI_Status *status);
- static int write_shared(MPI_File fh, void *buf, int count,MPI_Datatype datatype, MPI_Status *status);
- static int write_ordered(MPI_File fh, void *buf, int count,MPI_Datatype datatype, MPI_Status *status);
- template <int (*T)(MPI_File, void *, int, MPI_Datatype, MPI_Status *)> int op_all(void *buf, int count,MPI_Datatype datatype, MPI_Status *status);
+ void set_size(int size);
+ static int read(MPI_File fh, void* buf, int count, const Datatype* datatype, MPI_Status* status);
+ static int read_shared(MPI_File fh, void* buf, int count, const Datatype* datatype, MPI_Status* status);
+ static int read_ordered(MPI_File fh, void* buf, int count, const Datatype* datatype, MPI_Status* status);
+ static int write(MPI_File fh, void* buf, int count, const Datatype* datatype, MPI_Status* status);
+ static int write_shared(MPI_File fh, const void* buf, int count, const Datatype* datatype, MPI_Status* status);
+ static int write_ordered(MPI_File fh, const void* buf, int count, const Datatype* datatype, MPI_Status* status);
+ template <int (*T)(MPI_File, void*, int, const Datatype*, MPI_Status*)>
+ int op_all(void* buf, int count, const Datatype* datatype, MPI_Status* status);
static int close(MPI_File *fh);
- static int del(char *filename, MPI_Info info);
+ static int del(const char* filename, const Info* info);
+ MPI_Errhandler errhandler();
+ void set_errhandler( MPI_Errhandler errhandler);
+ void set_atomicity(bool a);
+ bool get_atomicity() const;
+ static File* f2c(int id);
};
- /* Read_all, Write_all : loosely based on */
- /* @article{Thakur:1996:ETM:245875.245879,*/
- /* author = {Thakur, Rajeev and Choudhary, Alok},*/
- /* title = {An Extended Two-phase Method for Accessing Sections of Out-of-core Arrays},*/
- /* journal = {Sci. Program.},*/
- /* issue_date = {Winter 1996},*/
- /* pages = {301--317},*/
- /* }*/
- template <int (*T)(MPI_File, void *, int, MPI_Datatype, MPI_Status *)>
- int File::op_all(void *buf, int count, MPI_Datatype datatype, MPI_Status *status){
- //get min and max offsets from everyone.
- int size = comm_->size();
- int rank = comm_-> rank();
- MPI_Offset min_offset = file_->tell();
- MPI_Offset max_offset = (min_offset + count * datatype->size());//cheating, as we don't care about exact data location, we can skip extent
- MPI_Offset* min_offsets = new MPI_Offset[size];
- MPI_Offset* max_offsets = new MPI_Offset[size];
- simgrid::smpi::Colls::allgather(&min_offset, 1, MPI_OFFSET, min_offsets, 1, MPI_OFFSET, comm_);
- simgrid::smpi::Colls::allgather(&max_offset, 1, MPI_OFFSET, max_offsets, 1, MPI_OFFSET, comm_);
- MPI_Offset min=min_offset;
- MPI_Offset max=max_offset;
- MPI_Offset tot= 0;
- int empty=1;
- for(int i=0;i<size;i++){
- if(min_offsets[i]!=max_offsets[i])
- empty=0;
- tot+=(max_offsets[i]-min_offsets[i]);
- if(min_offsets[i]<min)
- min=min_offsets[i];
- if(max_offsets[i]>max)
- max=max_offsets[i];
- }
-
- XBT_CDEBUG(smpi_pmpi, "my offsets to read : %lld:%lld, global min and max %lld:%lld", min_offset, max_offset, min, max);
- if(empty==1){
- delete[] min_offsets;
- delete[] max_offsets;
- status->count=0;
- return MPI_SUCCESS;
- }
- MPI_Offset total = max-min;
- if(total==tot && (datatype->flags() & DT_FLAG_CONTIGUOUS)){
- delete[] min_offsets;
- delete[] max_offsets;
- //contiguous. Just have each proc perform its read
- status->count=count * datatype->size();
- return T(this,buf,count,datatype, status);
- }
+/* Read_all, Write_all : loosely based on */
+/* @article{Thakur:1996:ETM:245875.245879,*/
+/* author = {Thakur, Rajeev and Choudhary, Alok},*/
+/* title = {An Extended Two-phase Method for Accessing Sections of Out-of-core Arrays},*/
+/* journal = {Sci. Program.},*/
+/* issue_date = {Winter 1996},*/
+/* pages = {301--317},*/
+/* }*/
+template <int (*T)(MPI_File, void*, int, const Datatype*, MPI_Status*)>
+int File::op_all(void* buf, int count, const Datatype* datatype, MPI_Status* status)
+{
+ // get min and max offsets from everyone.
+ int size = comm_->size();
+ int rank = comm_->rank();
+ MPI_Offset min_offset = file_->tell();
+ MPI_Offset max_offset =
+ min_offset +
+ count * datatype->get_extent(); // cheating, as we don't care about exact data location, we can skip extent
+ std::vector<MPI_Offset> min_offsets(size);
+ std::vector<MPI_Offset> max_offsets(size);
+ simgrid::smpi::colls::allgather(&min_offset, 1, MPI_OFFSET, min_offsets.data(), 1, MPI_OFFSET, comm_);
+ simgrid::smpi::colls::allgather(&max_offset, 1, MPI_OFFSET, max_offsets.data(), 1, MPI_OFFSET, comm_);
+ MPI_Offset min = min_offset;
+ MPI_Offset max = max_offset;
+ MPI_Offset tot = 0;
+ int empty = 1;
+ for (int i = 0; i < size; i++) {
+ if (min_offsets[i] != max_offsets[i])
+ empty = 0;
+ tot += (max_offsets[i] - min_offsets[i]);
+ if (min_offsets[i] < min)
+ min = min_offsets[i];
+ if (max_offsets[i] > max)
+ max = max_offsets[i];
+ }
- //Interleaved case : How much do I need to read, and whom to send it ?
- MPI_Offset my_chunk_start=(max-min+1)/size*rank;
- MPI_Offset my_chunk_end=((max-min+1)/size*(rank+1));
- XBT_CDEBUG(smpi_pmpi, "my chunks to read : %lld:%lld", my_chunk_start, my_chunk_end);
- int* send_sizes = new int[size];
- int* recv_sizes = new int[size];
- int* send_disps = new int[size];
- int* recv_disps = new int[size];
- int total_sent=0;
- for(int i=0;i<size;i++){
- send_sizes[i]=0;
- send_disps[i]=0;//cheat to avoid issues when send>recv as we use recv buffer
- if((my_chunk_start>=min_offsets[i] && my_chunk_start < max_offsets[i])||
- ((my_chunk_end<=max_offsets[i]) && my_chunk_end> min_offsets[i])){
- send_sizes[i]=(std::min(max_offsets[i]-1, my_chunk_end-1)-std::max(min_offsets[i], my_chunk_start));
- //store min and max offest to actually read
- min_offset=std::min(min_offset, min_offsets[i]);
- total_sent+=send_sizes[i];
- XBT_CDEBUG(smpi_pmpi, "will have to send %d bytes to %d", send_sizes[i], i);
- }
+ XBT_CDEBUG(smpi_io, "my offsets to read : %lld:%lld, global min and max %lld:%lld", min_offset, max_offset, min,
+ max);
+ if (empty == 1) {
+ if (status != MPI_STATUS_IGNORE)
+ status->count = 0;
+ return MPI_SUCCESS;
+ }
+ XBT_CDEBUG(smpi_io, "min:max : %lld:%lld, tot %lld contig %u", min, max, tot, (datatype->flags() & DT_FLAG_CONTIGUOUS));
+ if ( size==1 || (max - min == tot && (datatype->flags() & DT_FLAG_CONTIGUOUS))) {
+ // contiguous. Just have each proc perform its read
+ if (status != MPI_STATUS_IGNORE)
+ status->count = count * datatype->size();
+ int ret = T(this, buf, count, datatype, status);
+ seek(max_offset, MPI_SEEK_SET);
+ return ret;
+ }
+
+ // Interleaved case : How much do I need to read, and whom to send it ?
+ MPI_Offset my_chunk_start = min + (max - min + 1) / size * rank;
+ MPI_Offset my_chunk_end = min + ((max - min + 1) / size * (rank + 1)) +1;
+ XBT_CDEBUG(smpi_io, "my chunks to read : %lld:%lld", my_chunk_start, my_chunk_end);
+ std::vector<int> send_sizes(size);
+ std::vector<int> recv_sizes(size);
+ std::vector<int> send_disps(size);
+ std::vector<int> recv_disps(size);
+ int total_sent = 0;
+ for (int i = 0; i < size; i++) {
+ send_sizes[i] = 0;
+ send_disps[i] = 0; // cheat to avoid issues when send>recv as we use recv buffer
+ if ((my_chunk_start >= min_offsets[i] && my_chunk_start < max_offsets[i]) ||
+ ((my_chunk_end <= max_offsets[i]) && my_chunk_end > min_offsets[i])) {
+ send_sizes[i] = (std::min(max_offsets[i], my_chunk_end) - std::max(min_offsets[i], my_chunk_start));
+ //we want to send only useful data, so let's pretend we pack it
+ send_sizes[i]=send_sizes[i]/datatype->get_extent()*datatype->size();
+ // store min and max offset to actually read
+
+ min_offset = std::min(min_offset, min_offsets[i]);
+ total_sent += send_sizes[i];
+ XBT_CDEBUG(smpi_io, "will have to send %d bytes to %d", send_sizes[i], i);
}
- min_offset=std::max(min_offset, my_chunk_start);
+ }
+ min_offset = std::max(min_offset, my_chunk_start);
- //merge the ranges of every process
- std::vector<std::pair<MPI_Offset, MPI_Offset>> ranges;
- for(int i=0; i<size; ++i)
- ranges.push_back(std::make_pair(min_offsets[i],max_offsets[i]));
- std::sort(ranges.begin(), ranges.end());
- std::vector<std::pair<MPI_Offset, MPI_Offset>> chunks;
- chunks.push_back(ranges[0]);
+ // merge the ranges of every process
+ std::vector<std::pair<MPI_Offset, MPI_Offset>> ranges;
+ for (int i = 0; i < size; ++i)
+ ranges.emplace_back(min_offsets[i], max_offsets[i]);
+ std::sort(ranges.begin(), ranges.end());
+ std::vector<std::pair<MPI_Offset, MPI_Offset>> chunks;
+ chunks.push_back(ranges[0]);
- unsigned int nchunks=0;
- unsigned int i=1;
- while(i < ranges.size()){
- if(ranges[i].second>chunks[nchunks].second){
- // else range included - ignore
- if(ranges[i].first>chunks[nchunks].second){
- //new disjoint range
- chunks.push_back(ranges[i]);
- nchunks++;
- } else {
- //merge ranges
- chunks[nchunks].second=ranges[i].second;
- }
+ unsigned int nchunks = 0;
+ for (unsigned i = 1; i < ranges.size(); i++) {
+ if (ranges[i].second > chunks[nchunks].second) {
+ // else range included - ignore
+ if (ranges[i].first > chunks[nchunks].second) {
+ // new disjoint range
+ chunks.push_back(ranges[i]);
+ nchunks++;
+ } else {
+ // merge ranges
+ chunks[nchunks].second = ranges[i].second;
}
- i++;
- }
- //what do I need to read ?
- MPI_Offset totreads=0;
- for(i=0; i<chunks.size();i++){
- if(chunks[i].second < my_chunk_start)
- continue;
- else if (chunks[i].first > my_chunk_end)
- continue;
- else
- totreads += (std::min(chunks[i].second, my_chunk_end-1)-std::max(chunks[i].first, my_chunk_start));
}
- XBT_CDEBUG(smpi_pmpi, "will have to access %lld from my chunk", totreads);
+ }
+ // what do I need to read ?
+ MPI_Offset totreads = 0;
+ for (auto const& [chunk_start, chunk_end] : chunks) {
+ if (chunk_end < my_chunk_start)
+ continue;
+ else if (chunk_start > my_chunk_end)
+ continue;
+ else
+ totreads += (std::min(chunk_end, my_chunk_end) - std::max(chunk_start, my_chunk_start));
+ }
+ XBT_CDEBUG(smpi_io, "will have to access %lld from my chunk", totreads);
- char* sendbuf= static_cast<char *>(smpi_get_tmp_sendbuffer(total_sent));
+ unsigned char* sendbuf = smpi_get_tmp_sendbuffer(total_sent);
- if(totreads>0){
- seek(min_offset, MPI_SEEK_SET);
- T(this,sendbuf,totreads/datatype->size(),datatype, status);
- }
- simgrid::smpi::Colls::alltoall(send_sizes, 1, MPI_INT, recv_sizes, 1, MPI_INT, comm_);
- int total_recv=0;
- for(int i=0;i<size;i++){
- recv_disps[i]=total_recv;
- total_recv+=recv_sizes[i];
- }
- //Set buf value to avoid copying dumb data
- simgrid::smpi::Colls::alltoallv(sendbuf, send_sizes, send_disps, MPI_BYTE,
- buf, recv_sizes, recv_disps, MPI_BYTE, comm_);
- status->count=count * datatype->size();
- smpi_free_tmp_buffer(sendbuf);
- delete[] send_sizes;
- delete[] recv_sizes;
- delete[] send_disps;
- delete[] recv_disps;
- delete[] min_offsets;
- delete[] max_offsets;
- return MPI_SUCCESS;
+ if (totreads > 0) {
+ seek(min_offset, MPI_SEEK_SET);
+ T(this, sendbuf, totreads / datatype->get_extent(), datatype, status);
+ seek(max_offset, MPI_SEEK_SET);
}
+ simgrid::smpi::colls::alltoall(send_sizes.data(), 1, MPI_INT, recv_sizes.data(), 1, MPI_INT, comm_);
+ int total_recv = 0;
+ for (int i = 0; i < size; i++) {
+ recv_disps[i] = total_recv;
+ total_recv += recv_sizes[i];
+ }
+ // Set buf value to avoid copying dumb data
+ simgrid::smpi::colls::alltoallv(sendbuf, send_sizes.data(), send_disps.data(), MPI_BYTE, buf, recv_sizes.data(),
+ recv_disps.data(), MPI_BYTE, comm_);
+ if (status != MPI_STATUS_IGNORE)
+ status->count = count * datatype->size();
+ smpi_free_tmp_buffer(sendbuf);
+ return MPI_SUCCESS;
}
-}
+} // namespace simgrid::smpi
#endif
