[24589] | 1 | // Master-worker program to read in a list of files and invoke
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| 2 | // import on each separately using manifest files in Greenstone 3,
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| 3 | // with synchronisation using OpenMPI
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| 4 | //
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| 5 | // Hussein Suleman
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| 6 | // 1 July 2010
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| 7 |
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[24699] | 8 | // 2011MAR - added a bunch of commands to aid (my) understanding.
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| 9 | // - made site argument optional to support GS2.
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[24589] | 10 | // - moving manifest writing code into the rank=0 thread. This will
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| 11 | // remove the artificial limit on epoc size caused by size of
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[24699] | 12 | // message buffer between controller and child threads. [jmt12]
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| 13 | // 2011SEP - changing where the manifest files are written so I have the
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| 14 | // ability to set up the location as a RAMDisk. [jmt12]
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[24589] | 15 |
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| 16 | #include "mpi.h"
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| 17 |
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| 18 | #include <stdio.h>
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| 19 | #include <stdlib.h>
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| 20 |
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| 21 | #include <fstream>
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| 22 | #include <iostream>
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[24699] | 23 | #include <sstream>
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[24589] | 24 | #include <string>
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| 25 | #include <vector>
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| 26 |
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| 27 | using namespace std;
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| 28 |
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[24833] | 29 | //#define HARDAFFINITY 1
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[24589] | 30 | #define BUFFERSIZE 512
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| 31 |
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| 32 | int
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| 33 | main ( int argc, char *argv [] )
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| 34 | {
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| 35 | int numtasks, rank, rc; // MPI variables
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| 36 |
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| 37 | if (5 != argc && argc != 6 )
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| 38 | {
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| 39 | cerr << "Usage: " << argv[0] << " filelist epoch gsdlhome collection [site]" << endl;
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| 40 | exit(-1);
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| 41 | }
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| 42 |
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| 43 | char *filelist = argv[1]; // list of filenames
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| 44 | char *epochStr = argv[2]; // number of files per task
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| 45 | int epoch = atoi (epochStr);
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| 46 | char *gsdlhomedir = argv[3]; // location of import script
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| 47 | char *collection = argv[4]; // Greenstone collection
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| 48 | char *site = "";
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| 49 | if (argc == 6)
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| 50 | {
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| 51 | site = argv[5]; // Greenstone site
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| 52 | }
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| 53 |
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| 54 | // start MPI environment
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| 55 | rc = MPI_Init(&argc,&argv);
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| 56 | if (rc != MPI_SUCCESS)
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| 57 | {
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| 58 | printf ("Error starting MPI program. Terminating.\n");
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| 59 | MPI_Abort(MPI_COMM_WORLD, rc);
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| 60 | }
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| 61 |
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| 62 | // We'll handle errors ourselves
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| 63 | MPI_Errhandler_set(MPI_COMM_WORLD, MPI_ERRORS_RETURN);
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| 64 |
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| 65 | // get MPI variables: number of processors and processor number
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| 66 | MPI_Status stat;
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| 67 | MPI_Comm_size(MPI_COMM_WORLD, &numtasks);
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| 68 | MPI_Comm_rank(MPI_COMM_WORLD, &rank);
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| 69 |
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| 70 | // master node processing
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| 71 | if (rank == 0)
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| 72 | {
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[24833] | 73 | cerr << " * Master Starting" << endl;
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[24589] | 74 | char incoming[BUFFERSIZE]; // buffer for acknowledgments
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| 75 | char buffer[BUFFERSIZE]; // buffer to send tasks
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| 76 | MPI_Request request[BUFFERSIZE]; // request monitor for all tasks
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| 77 | MPI_Status status[BUFFERSIZE]; // status monitor for all tasks
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| 78 | int actualTasks = 0; // number of processors running
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| 79 |
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| 80 | vector<char *> manifest_files; // Keep track of temp manifest filenames
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| 81 |
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| 82 | // open file listing filenames to process
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| 83 | ifstream infile;
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| 84 | infile.open (filelist);
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| 85 | string line;
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| 86 |
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| 87 | // set initial status of all processors to idle
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[24833] | 88 | cerr << " - initializing processor state" << endl;
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[24589] | 89 | for ( int j=0; j<BUFFERSIZE; j++ )
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| 90 | {
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| 91 | incoming[j] = ' ';
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| 92 | }
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| 93 |
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| 94 | // scan through contents of file listing
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[24699] | 95 | int manifest_file_count = 1;
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[24833] | 96 | cerr << " - processing contents of filelist.txt" << endl;
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[24589] | 97 | while (!infile.eof ())
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| 98 | {
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| 99 | // get a filename
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| 100 | getline (infile, line);
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| 101 | if (line.length() > 0)
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| 102 | {
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| 103 | // search for idle processor
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| 104 | int dest=0;
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| 105 | int found = 0;
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[24833] | 106 | cerr << " - searching for idle processor" << endl;
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[24589] | 107 | while ((dest<(numtasks-1)) && (found == 0))
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| 108 | {
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| 109 | if (incoming[dest] == ' ')
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| 110 | {
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| 111 | found = 1;
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| 112 | }
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| 113 | else
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| 114 | {
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| 115 | dest++;
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| 116 | }
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| 117 | }
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| 118 |
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| 119 | // if no idle processor, wait for one to become idle
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| 120 | if (found == 0)
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| 121 | {
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[24833] | 122 | cerr << " - waiting for processor to become idle" << endl;
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[24589] | 123 | MPI_Waitany (numtasks-1, request, &dest, status);
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| 124 | }
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| 125 |
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| 126 | // construct manifest filename
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[24833] | 127 | cerr << " - creating manifest file: number " << manifest_file_count << endl;
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[24699] | 128 | stringstream manifestfilename_strstr;
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| 129 | manifestfilename_strstr << gsdlhomedir << "/collect/" << collection << "/tmp/manifest." << manifest_file_count << ".xml";
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| 130 | string manifestfilename_str = manifestfilename_strstr.str();
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| 131 | char *manifestfilename = new char [manifestfilename_str.size() + 1];
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| 132 | strcpy(manifestfilename, manifestfilename_str.c_str());
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[24589] | 133 | ofstream manifestfile;
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| 134 | if (manifestfilename != NULL)
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| 135 | {
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| 136 | // create manifest file
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| 137 | manifestfile.open (manifestfilename);
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| 138 | if (manifestfile.fail())
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| 139 | {
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| 140 | cerr << "Fatal Error! Failed to open temporary manifest file for writing: " << manifestfile << endl;
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| 141 | }
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| 142 | }
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| 143 | else
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| 144 | {
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| 145 | cerr << "Fatal Error! Failed to open temporary manifest file for writing: " << manifestfile << endl;
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| 146 | }
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| 147 | manifestfile << "<Manifest><Index>" << endl;
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| 148 |
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| 149 | // add the first filename to the instruction
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| 150 | manifestfile << "<Filename>" << line << "</Filename>" << endl;
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| 151 | int epochCounter = epoch;
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| 152 |
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| 153 | // if epoch>1 and more filenames, add more filenames
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| 154 | while ((epochCounter > 1) && (!infile.eof ()))
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| 155 | {
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| 156 | getline (infile, line);
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| 157 | if (line.length () > 0)
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| 158 | {
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| 159 | manifestfile << "<Filename>" << line << "</Filename>" << endl;
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| 160 | epochCounter--;
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| 161 | }
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| 162 | }
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| 163 |
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| 164 | manifestfile << "</Index></Manifest>" << endl;
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| 165 | manifestfile.close ();
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| 166 |
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[24833] | 167 | cerr << " - manifest file complete" << endl;
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| 168 |
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[24589] | 169 | // Store manifest filepath so we can remove it later
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| 170 | manifest_files.push_back(manifestfilename);
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| 171 |
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| 172 | // Send the manifest filename as the instruction
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[24833] | 173 | cerr << " - writing manifest filename as instruction to worker" << endl;
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[24589] | 174 | sprintf(buffer, "%s", manifestfilename);
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| 175 |
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| 176 | // mark processors as busy
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| 177 | incoming[dest] = 'B';
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| 178 | // send out the job to the processor
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[24833] | 179 | cerr << " - asking worker to start" << endl;
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[24589] | 180 | MPI_Send (&buffer, strlen (buffer)+1, MPI_CHAR, dest+1, 1, MPI_COMM_WORLD);
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| 181 | // wait for a done acknowledgement
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| 182 | MPI_Irecv (&incoming[dest], 1, MPI_CHAR, dest+1, 1, MPI_COMM_WORLD, &request[dest]);
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[24833] | 183 | cerr << " - worker replied that it has started" << endl;
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[24589] | 184 | // update counter of actual tasks
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| 185 | if (dest > actualTasks)
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| 186 | {
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| 187 | actualTasks = dest;
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[24833] | 188 | cerr << " - increased the number of running workers to: " << actualTasks << endl;
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[24589] | 189 | }
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[24699] | 190 | // increase number of manifest files processed
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| 191 | manifest_file_count++;
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[24589] | 192 | }
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| 193 | }
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| 194 |
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| 195 | infile.close();
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| 196 |
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| 197 | // wait until all outstanding tasks are completed
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[24833] | 198 | cerr << " - waiting for all outstanding tasks to complete" << endl;
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[24589] | 199 | int dest;
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| 200 | for ( int k=0; k<actualTasks; k++ )
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| 201 | {
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| 202 | MPI_Waitany (actualTasks, request, &dest, status);
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| 203 | }
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| 204 |
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| 205 | // send message to end all processing engines
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[24833] | 206 | cerr << " * Master asking children to exit" << endl;
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[24589] | 207 | char endstr[5] = "end";
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| 208 | for ( int i=1; i<numtasks; i++ )
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| 209 | {
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| 210 | MPI_Send (endstr, 4, MPI_CHAR, i, 1, MPI_COMM_WORLD);
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| 211 | }
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| 212 |
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| 213 | // Free up manifest files
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[24833] | 214 | cerr << " - freeing shared memory used by manifest files" << endl;
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[24589] | 215 | for ( int i = 0; i < manifest_files.size(); i++)
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| 216 | {
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| 217 | free(manifest_files[i]);
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| 218 | }
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[24833] | 219 | cerr << " * Master Exiting" << endl;
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[24589] | 220 | }
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| 221 | // slave node processing
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| 222 | else
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| 223 | {
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[24833] | 224 | ///out << "Worker Starting" << endl;
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[24589] | 225 | char incoming[BUFFERSIZE];
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| 226 |
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[24833] | 227 | int counter = 0;
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| 228 |
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[24589] | 229 | do
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| 230 | {
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| 231 | // wait for instruction from master
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| 232 | int resval = MPI_Recv (&incoming, BUFFERSIZE, MPI_CHAR, 0, 1, MPI_COMM_WORLD, &stat);
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| 233 | if (resval != MPI_SUCCESS)
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| 234 | {
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| 235 | printf ("Error when recieving message from master [%d]... Terminating.\n", resval);
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| 236 | MPI_Abort(MPI_COMM_WORLD, rc);
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| 237 | }
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[24833] | 238 | counter++;
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[24589] | 239 | if (strcmp (incoming, "end") != 0)
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| 240 | {
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| 241 | // process a received job
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[24833] | 242 | cerr << "Worker Processing [" << rank << ":" << incoming << "]" << endl;
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[24589] | 243 |
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| 244 | // create Greenstone import command
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| 245 | // - incoming now contains the name of the manifest file to process
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| 246 | char command[2048];
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[24833] | 247 |
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| 248 | #ifdef HARDAFFINITY
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| 249 | int cpu = rank - 1;
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| 250 | cerr << "Setting affinity for worker " << rank << " to cpu " << cpu << endl;
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[24589] | 251 | if (site != "")
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| 252 | {
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[24833] | 253 | sprintf (command, "taskset -c %d %s/bin/script/import.pl -verbosity 0 -keepold -manifest %s -site %s %s", cpu, gsdlhomedir, incoming, site, collection);
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[24589] | 254 | }
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| 255 | else
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| 256 | {
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[24833] | 257 | sprintf (command, "taskset -c %d %s/bin/script/import.pl -verbosity 0 -keepold -manifest %s %s", cpu, gsdlhomedir, incoming, collection);
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[24589] | 258 | }
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[24833] | 259 | #else
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| 260 | if (site != "")
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| 261 | {
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| 262 | sprintf (command, "%s/bin/script/import.pl -verbosity 0 -keepold -manifest %s -site %s %s", gsdlhomedir, incoming, site, collection);
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| 263 | }
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| 264 | else
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| 265 | {
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| 266 | //sprintf (command, "%s/bin/script/import.pl -verbosity 0 -keepold -manifest %s %s", gsdlhomedir, incoming, collection);
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| 267 | sprintf (command, "%s/bin/script/import.pl -keepold -manifest %s %s > %s/collect/%s/logs/import-p%d-%d.log 2>&1", gsdlhomedir, incoming, collection, gsdlhomedir, collection, rank, counter);
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| 268 | }
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| 269 | #endif
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[24589] | 270 |
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[24833] | 271 | cerr << "**** cmd = " << command << endl;
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| 272 |
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[24589] | 273 | // invoke Greenstone import with manifest file
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| 274 | system (command);
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[24833] | 275 | cerr << "**** complete" << endl;
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[24589] | 276 | char line = ' ';
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| 277 | // send completed message
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| 278 | MPI_Send (&line, 1, MPI_CHAR, 0, 1, MPI_COMM_WORLD);
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| 279 | }
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| 280 | }
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| 281 | while (strcmp (incoming, "end") != 0);
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| 282 | // stop when "end" instruction is received
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[24833] | 283 | cerr << "Worker Exiting" << endl;
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[24589] | 284 | }
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| 285 |
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| 286 | // clean up MPI environment
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[24833] | 287 | cerr << "Finalizing..." << endl;
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[24589] | 288 | MPI_Finalize();
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| 289 | }
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