multithreading tests from 152 lab 5

[riscv-tests.git] / mt / ba_vvadd / ba_vvadd.c

diff --git a/mt/ba_vvadd/ba_vvadd.c b/mt/ba_vvadd/ba_vvadd.c
new file mode 100755 (executable)
index 0000000..30703df
--- /dev/null
+++ b/mt/ba_vvadd/ba_vvadd.c
@@ -0,0 +1,168 @@
+//**************************************************************************
+// Vector-vector add benchmark
+//--------------------------------------------------------------------------
+// Author  : Andrew Waterman
+// TA      : Christopher Celio
+// Student : 
+//
+// This benchmark adds two vectors and writes the results to a
+// third vector. The input data (and reference data) should be
+// generated using the vvadd_gendata.pl perl script and dumped
+// to a file named dataset.h 
+
+// to print out arrays, etc.
+//#define DEBUG
+
+//--------------------------------------------------------------------------
+// Includes 
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+
+//--------------------------------------------------------------------------
+// Input/Reference Data
+
+typedef float data_t;
+#include "dataset.h"
+ 
+  
+//--------------------------------------------------------------------------
+// Basic Utilities and Multi-thread Support
+
+__thread unsigned long coreid;
+unsigned long ncores;
+
+#include "util.h"
+   
+#define stringify_1(s) #s
+#define stringify(s) stringify_1(s)
+#define stats(code) do { \
+    unsigned long _c = -rdcycle(), _i = -rdinstret(); \
+    code; \
+    _c += rdcycle(), _i += rdinstret(); \
+    if (coreid == 0) \
+      printf("%s: %ld cycles, %ld.%ld cycles/iter, %ld.%ld CPI\n", \
+             stringify(code), _c, _c/DATA_SIZE, 10*_c/DATA_SIZE%10, _c/_i, 10*_c/_i%10); \
+  } while(0)
+ 
+
+//--------------------------------------------------------------------------
+// Helper functions
+ 
+void printArray( char name[], int n, data_t arr[] )
+{
+  int i;
+  if (coreid != 0)
+     return;
+
+  printf( " %10s :", name );
+  for ( i = 0; i < n; i++ )
+    printf( " %4ld ", (long) arr[i] );
+  printf( "\n" );
+}
+      
+void __attribute__((noinline)) verify(size_t n, const data_t* test, const data_t* correct)
+{
+   if (coreid != 0)
+      return;
+
+   size_t i;
+   for (i = 0; i < n; i++)
+   {
+      if (test[i] != correct[i])
+      {
+         printf("FAILED test[%d]= %4ld, correct[%d]= %4ld\n", 
+            i, (long) test[i], i, (long)correct[i]);
+         exit(-1);
+      }
+   }
+   
+   return;
+}
+ 
+//--------------------------------------------------------------------------
+// vvadd function
+
+//perform in-place vvadd
+void __attribute__((noinline)) vvadd(size_t n, data_t* __restrict__ x, const data_t* __restrict__ y)
+{
+   size_t i;
+
+   // interleave accesses
+   for (i = coreid; i < n; i+=ncores)
+   {
+      x[i] = x[i] + y[i];
+   }
+}
+
+void __attribute__((noinline)) vvadd_opt(size_t n, data_t* __restrict__ x, const data_t* __restrict__ y)
+{
+       size_t i;
+       size_t start = n * coreid / ncores;
+       size_t end = (coreid == ncores - 1) ? n : n * (coreid+1)/ ncores;
+       for (i = start; i < end; i++) {
+               x[i] = x[i] + y[i];
+       }
+}
+
+//--------------------------------------------------------------------------
+// Main
+//
+// all threads start executing thread_entry(). Use their "coreid" to
+// differentiate between threads (each thread is running on a separate core).
+  
+void thread_entry(int cid, int nc)
+{
+   coreid = cid;
+   ncores = nc;
+
+   // static allocates data in the binary, which is visible to both threads
+   static data_t results_data[DATA_SIZE];
+   
+   // because we're going to perform an in-place vvadd (and we're going to run
+   // it a couple of times) let's copy the input data to a temporary results
+   // array
+   
+   size_t i;
+   if (coreid == 0)
+   {
+      for (i = 0; i < DATA_SIZE; i++)
+         results_data[i] = input1_data[i];
+   }
+
+
+   // Execute the provided, terrible vvadd
+   barrier();
+   stats(vvadd(DATA_SIZE, results_data, input2_data); barrier());
+ 
+   
+   // verify
+   verify(DATA_SIZE, results_data, verify_data);
+   
+   // reset results from the first trial
+   if (coreid == 0) 
+   {
+      for (i=0; i < DATA_SIZE; i++)
+         results_data[i] = input1_data[i];
+   }
+   barrier();
+                                            
+   
+   // Execute your faster vvadd
+   barrier();
+   stats(vvadd_opt(DATA_SIZE, results_data, input2_data); barrier());
+
+#ifdef DEBUG
+   printArray("results: ", DATA_SIZE, results_data);
+   printArray("verify : ", DATA_SIZE, verify_data);
+#endif
+   
+   // verify
+   verify(DATA_SIZE, results_data, verify_data);
+   barrier();
+
+   exit(0);
+}
+