Note on Stride:
Memory stride is the distance between memory accesses and is measured as:

Local stride: This is the memory stride between two memory accesses for the same memory reference.

Global stride: This is the memory stride between memory accesses for consecutive memory references.

Consider the following example:

for (i=0; i<1000; i++){
   for(j=0; j<10; j++){
       sum += arrayOne[i] + arrayTwo[j];
   }
   result[i] = sum;
}

Note: This also means that if a region of code contains only 1 memory reference, global stride will be the same as local stride.

gStride7:
gStride7 or global stride 7 is a measure of the number of consecutive memory references that access the same 8 Byte memory location (through a double or int64_t data type).

Classifying gStride7:
gStride7 can be classified as low, medium or high as follows:

Bucket	Condition
Low	The region of code contains no memory references. OR The region of code contains a number of memory references and no combinations of the memory references have a global stride of 7.
Medium	The region of code contains a number of memory references and the references that have a global stride of 7 are outnumbered by about 12:1.
High	The region of code contains a number of memory references and the references that have a global stride of 7 are outnumbered by 10:1 or more.

Example:
Consider the following code:

for (i=0; i<1000; i++){
   for(j=0; j<10; j++){
       sum += arrayOne[i] * arrayTwo[j];
   }
   result[i] = sum;
}