mt/ay_matmul/ay_matmul.c

   1 //**************************************************************************
   2 // Multi-threaded Matrix Multiply benchmark
   3 //--------------------------------------------------------------------------
   4 // TA     : Christopher Celio
   5 // Student:
   6 //
   7 //
   8 // This benchmark multiplies two 2-D arrays together and writes the results to
   9 // a third vector. The input data (and reference data) should be generated
  10 // using the matmul_gendata.pl perl script and dumped to a file named
  11 // dataset.h.
  12
  13
  14 // print out arrays, etc.
  15 //#define DEBUG
  16
  17 //--------------------------------------------------------------------------
  18 // Includes
  19
  20 #include <string.h>
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23
  24
  25 //--------------------------------------------------------------------------
  26 // Input/Reference Data
  27
  28 typedef float data_t;
  29 #include "dataset.h"
  30
  31
  32 //--------------------------------------------------------------------------
  33 // Basic Utilities and Multi-thread Support
  34
  35 __thread unsigned long coreid;
  36 unsigned long ncores;
  37
  38 #include "util.h"
  39
  40 #define stringify_1(s) #s
  41 #define stringify(s) stringify_1(s)
  42 #define stats(code) do { \
  43     unsigned long _c = -rdcycle(), _i = -rdinstret(); \
  44     code; \
  45     _c += rdcycle(), _i += rdinstret(); \
  46     if (coreid == 0) \
  47       printf("%s: %ld cycles, %ld.%ld cycles/iter, %ld.%ld CPI\n", \
  48              stringify(code), _c, _c/DIM_SIZE/DIM_SIZE/DIM_SIZE, 10*_c/DIM_SIZE/DIM_SIZE/DIM_SIZE%10, _c/_i, 10*_c/_i%10); \
  49   } while(0)
  50
  51
  52 //--------------------------------------------------------------------------
  53 // Helper functions
  54
  55 void printArrayMT( char name[], int n, data_t arr[] )
  56 {
  57    int i;
  58    if (coreid != 0)
  59       return;
  60
  61    printf( " %10s :", name );
  62    for ( i = 0; i < n; i++ )
  63       printf( " %3ld ", (long) arr[i] );
  64    printf( "\n" );
  65 }
  66
  67 void __attribute__((noinline)) verifyMT(size_t n, const data_t* test, const data_t* correct)
  68 {
  69    if (coreid != 0)
  70       return;
  71
  72    size_t i;
  73    for (i = 0; i < n; i++)
  74    {
  75       if (test[i] != correct[i])
  76       {
  77          printf("FAILED test[%d]= %3ld, correct[%d]= %3ld\n",
  78             i, (long)test[i], i, (long)correct[i]);
  79          exit(-1);
  80       }
  81    }
  82
  83    return;
  84 }
  85
  86 //--------------------------------------------------------------------------
  87 // matmul function
  88
  89 // single-thread, naive version
  90 void __attribute__((noinline)) matmul_naive(const int lda,  const data_t A[], const data_t B[], data_t C[] )
  91 {
  92    int i, j, k;
  93
  94    if (coreid > 0)
  95       return;
  96
  97    for ( i = 0; i < lda; i++ )
  98       for ( j = 0; j < lda; j++ )
  99       {
 100          for ( k = 0; k < lda; k++ )
 101          {
 102             C[i + j*lda] += A[j*lda + k] * B[k*lda + i];
 103          }
 104       }
 105
 106 }
 107
 108 void __attribute__((noinline)) matmul(const int lda,  const data_t A[], const data_t B[], data_t C[] )
 109 {
 110   static __thread int i, j, k;
 111   static __thread data_t tempA0, tempA1, tempA2, tempA3, tempA4, tempA5, tempA6, tempA7;
 112   static __thread data_t tempC0, tempC1, tempC2, tempC3, tempC4, tempC5, tempC6, tempC7, tempC8, tempC9, tempC10, tempC11, tempC12, tempC13, tempC14, tempC15;
 113
 114   static __thread int start, end, jStride, jToRow, jToCol;
 115
 116   start = coreid << 9;
 117   end = (coreid+1) << 9;
 118   jStride = 8;
 119
 120   for (j=start; j < end; j+=jStride) {
 121     jToRow = (j>>5)<<5;
 122     jToCol = j%32;
 123     tempC0  = 0;
 124     tempC1  = 0;
 125     tempC2  = 0;
 126     tempC3  = 0;
 127     tempC4  = 0;
 128     tempC5  = 0;
 129     tempC6  = 0;
 130     tempC7  = 0;
 131     for ( i=0; i < lda; i+=2 ) {
 132       tempA0 = A[i   + jToRow];
 133       tempA1 = A[i+1 + jToRow];
 134       tempC0  += tempA0 * B[(jToCol   ) + (i<<5)];
 135       tempC1  += tempA0 * B[(jToCol+1 ) + (i<<5)];
 136       tempC2  += tempA0 * B[(jToCol+2 ) + (i<<5)];
 137       tempC3  += tempA0 * B[(jToCol+3 ) + (i<<5)];
 138       tempC4  += tempA0 * B[(jToCol+4 ) + (i<<5)];
 139       tempC5  += tempA0 * B[(jToCol+5 ) + (i<<5)];
 140       tempC6  += tempA0 * B[(jToCol+6 ) + (i<<5)];
 141       tempC7  += tempA0 * B[(jToCol+7 ) + (i<<5)];
 142       tempC0  += tempA1 * B[(jToCol   ) + ((i+1)<<5)];
 143       tempC1  += tempA1 * B[(jToCol+1 ) + ((i+1)<<5)];
 144       tempC2  += tempA1 * B[(jToCol+2 ) + ((i+1)<<5)];
 145       tempC3  += tempA1 * B[(jToCol+3 ) + ((i+1)<<5)];
 146       tempC4  += tempA1 * B[(jToCol+4 ) + ((i+1)<<5)];
 147       tempC5  += tempA1 * B[(jToCol+5 ) + ((i+1)<<5)];
 148       tempC6  += tempA1 * B[(jToCol+6 ) + ((i+1)<<5)];
 149       tempC7  += tempA1 * B[(jToCol+7 ) + ((i+1)<<5)];
 150     }
 151     C[j] =tempC0;
 152     C[j + 1 ]=tempC1;
 153     C[j + 2 ]=tempC2;
 154     C[j + 3 ]=tempC3;
 155     C[j + 4 ]=tempC4;
 156     C[j + 5 ]=tempC5;
 157     C[j + 6 ]=tempC6;
 158     C[j + 7 ]=tempC7;
 159   }
 160
 161 }
 162
 163 //--------------------------------------------------------------------------
 164 // Main
 165 //
 166 // all threads start executing thread_entry(). Use their "coreid" to
 167 // differentiate between threads (each thread is running on a separate core).
 168
 169 void thread_entry(int cid, int nc)
 170 {
 171    coreid = cid;
 172    ncores = nc;
 173
 174    // static allocates data in the binary, which is visible to both threads
 175    static data_t results_data[ARRAY_SIZE];
 176
 177
 178    //// Execute the provided, naive matmul
 179    //barrier(nc);
 180    //stats(matmul_naive(DIM_SIZE, input1_data, input2_data, results_data); barrier(nc));
 181
 182    //
 183    //// verify
 184    //verifyMT(ARRAY_SIZE, results_data, verify_data);
 185    //
 186    //// clear results from the first trial
 187    //size_t i;
 188    //if (coreid == 0)
 189    //   for (i=0; i < ARRAY_SIZE; i++)
 190    //      results_data[i] = 0;
 191    //barrier(nc);
 192
 193
 194    // Execute your faster matmul
 195    barrier(nc);
 196    stats(matmul(DIM_SIZE, input1_data, input2_data, results_data); barrier(nc));
 197
 198 #ifdef DEBUG
 199    printArrayMT("results:", ARRAY_SIZE, results_data);
 200    printArrayMT("verify :", ARRAY_SIZE, verify_data);
 201 #endif
 202
 203    // verify
 204    verifyMT(ARRAY_SIZE, results_data, verify_data);
 205    barrier(nc);
 206
 207    exit(0);
 208 }
 209
 210