CTF support for .tns format

[jiawen11]

Hi,

I was trying to use CTF with the .tns tensor format and wrote the following codes. The codes work well for small .tns files but receive "core dump" for large .tns files (e.g., around 3M non-zeros). Does CTF support .tns files officially? If so, please let me know the approach. If not, may I know what the problems might be in the following codes?

Thank you so much for your help in advance!

#include <stdio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <string>
#include <math.h>
#include <assert.h>
#include <algorithm>
#include <vector>
#include "../src/shared/util.h"
#include "../src/interface/world.h"
#include "../src/interface/tensor.h"
#include "../src/interface/back_comp.h"

using namespace CTF;

CTF_Tensor *make_prod(
    bool is_sparse,
    CTF_World &dw,
    std::string const & name,
    std::vector<int>  ndimsA,
    std::vector<int> &ndimsB,
    int  mode
) {
    int nmodes = ndimsA.size();
    ndimsA[mode] = ndimsB[1];
    std::vector<int> ns(nmodes, NS);
    CTF_Tensor *result = new CTF_Tensor(nmodes, is_sparse, ndimsA.data(), ns.data(), dw, Ring<double>(), name.c_str(), true);
    return result;
}

CTF_Tensor *make_B(
    CTF_World &dw,
    std::string const & name,
    std::vector<int> const &ndimsA,
    std::vector<int> &ndimsB,
    int mode,
    int sizeB
) {
    ndimsB.resize(2);
    ndimsB[0] = ndimsA[mode];
    ndimsB[1] = sizeB;
    std::vector<int> ns(2, NS);
    CTF_Tensor *result = new CTF_Tensor(2, false, ndimsB.data(), ns.data(), dw, Ring<double>(), name.c_str(), true);
    return result;
}

CTF_Tensor *read_tensor(
    std::string const & filename,
    bool is_sparse,
    CTF_World &dw,
    std::string const & name,
    std::vector<int> &ndims
) {
    FILE *f = fopen(filename.c_str(), "r");
    if(!f) {
        fprintf(stderr, "unable to open %s\n", filename.c_str());
        exit(2);
    }
    printf("Reading from %s.\n", filename.c_str());
    int nmodes;
    fscanf(f, "%d", &nmodes);
    ndims.resize(nmodes);
    for(int i = 0; i < nmodes; ++i) {
        fscanf(f, "%d", &ndims[i]);
    }
    std::vector<int> ns(nmodes, NS);
    CTF_Tensor *result = new CTF_Tensor(nmodes, is_sparse, ndims.data(), ns.data(), dw, Ring<double>(), name.c_str(), true);
    std::vector<int64_t> inds;
    std::vector<double> values;
    for(;;) {
        long ii, jj, kk, ll;
        assert(nmodes == 3 || nmodes == 4);
        if (nmodes == 3) {
          if(fscanf(f, "%ld%ld%ld", &ii, &jj, &kk) == 3) {
              ii--; jj--; kk--; // offset 1
              int64_t global_idx = ii + jj*ndims[0] + kk*ndims[0]*ndims[1];
              inds.push_back(global_idx);
          } else {
              goto read_done;
          }
        } else if (nmodes ==4) {
          if(fscanf(f, "%ld%ld%ld%ld", &ii, &jj, &kk, &ll) == 4) {
              ii--; jj--; kk--; ll--; // offset 1
              int64_t global_idx = ii + jj*ndims[0] + kk*ndims[0]*ndims[1] + ll*ndims[0] * ndims[1] * ndims[2];
              inds.push_back(global_idx);
          } else {
              goto read_done;
          }
        }
        double v;
        if(fscanf(f, "%lf", &v) == 1) {
            values.push_back(v);
        } else {
            goto read_done;
        }
    }
read_done:
    result->write(values.size(), inds.data(), values.data());
    fclose(f);
    printf("Read from %s, %ld records.\n", filename.c_str(), (long) values.size());
    return result;
}

int bench_contraction(
                      std::string const & filenamea,
                      std::string const & filenameb,
					  char const * iA,
					  char const * iB,
					  char * idx_f,
                      CTF_World   &dw
                 ){

  int rank, i, num_pes;

  MPI_Comm_rank(MPI_COMM_WORLD, &rank);
  MPI_Comm_size(MPI_COMM_WORLD, &num_pes);

  int order_A, order_B, order_C, num_f;
  order_A = strlen(iA);
  order_B = strlen(iB);
  num_f = strlen(idx_f);
  char* iC = (char*) malloc(num_f * 2 * sizeof(char));
  order_C = strlen(iC);

  int NS_A[order_A];
  int NS_B[order_B];
  int NS_C[order_C];
  int n_A[order_A];
  int n_B[order_B];
  int n_C[order_C];

  for (i=0; i<order_A; i++){
    n_A[i] = 1;
    NS_A[i] = NS;
  }
  for (i=0; i<order_B; i++){
    n_B[i] = 1;
    NS_B[i] = NS;
  }
  for (i=0; i<order_C; i++){
    n_C[i] = 1;
    NS_C[i] = NS;
  }

  static std::vector<int> ndimsA, ndimsB, ndimsC;
  CTF_Tensor* A = read_tensor(filenamea, true, dw, "A", ndimsA);
  CTF_Tensor* B = read_tensor(filenamea, true, dw, "B", ndimsB);
  ndimsC.resize(order_C);

  for(int m = 0; m < num_f; ++m) {
    ndimsC[m] = ndimsA[idx_f[m]-48];
	ndimsC[num_f+m] = ndimsB[idx_f[m]-48];
	iC[m] = iA[idx_f[m]-48];
	iC[num_f+m] = iB[idx_f[m]-48];
  }

  std::vector<int> ns(order_C, NS);
  CTF_Tensor *C = new CTF_Tensor(order_C, 1, ndimsC.data(), ns.data(), dw, Ring<double>(), "C", true);

  /// Main computation
  double st_time = MPI_Wtime();
  (*C)[iC] = (*A)[iA]*(*B)[iB];
  double end_time = MPI_Wtime();

  printf("Time: %lf sec\n", end_time-st_time);

  return 1;
}

char* getCmdOption(char ** begin,
                   char ** end,
                   const   std::string & option){
  char ** itr = std::find(begin, end, option);
  if (itr != end && ++itr != end){
    return *itr;
  }
  return 0;
}


int main(int argc, char ** argv){
  int rank, np;
  int const in_num = argc;
  char ** input_str = argv;
  char const * A;
  char const * B;
  char * iA;
  char * iB;
  char * idx_f;
  int cmodes;

  MPI_Init(&argc, &argv);
  MPI_Comm_rank(MPI_COMM_WORLD, &rank);
  MPI_Comm_size(MPI_COMM_WORLD, &np);

  if (getCmdOption(input_str, input_str+in_num, "-A")){
    A = getCmdOption(input_str, input_str+in_num, "-A");
  } else A = "a.tns";
  if (getCmdOption(input_str, input_str+in_num, "-B")){
    B = getCmdOption(input_str, input_str+in_num, "-B");
  } else B = "b.tns";
  if (getCmdOption(input_str, input_str+in_num, "-a")){
    iA = getCmdOption(input_str, input_str+in_num, "-a");
  } else iA = "012";
  if (getCmdOption(input_str, input_str+in_num, "-b")){
    iB = getCmdOption(input_str, input_str+in_num, "-b");
  } else iB = "312";
  // The index of free modes
  if (getCmdOption(input_str, input_str+in_num, "-f")){
    idx_f = getCmdOption(input_str, input_str+in_num, "-f");
  } else idx_f = "0";

  CTF_World dw(argc, argv);
  bench_contraction(A, B, iA, iB, idx_f, dw);

  MPI_Finalize();
  return 0;
}