Parallel Computer Architecture

366 CHAPTER 5 Shared Memory Multiprocessors

array started at an offset of 32 bytes from a page in the virtual address space, as

this would mean that the data for each particle would now span two cache

blocks, causing false sharing despite the padding. Even if a ma Hoc call does

not return data aligned to pages or blocks, alignment is easy to achieve by sim-

ply allocating a little extra memory through ma Hoc and then suitably adjust-

ing the starting address of the array

As seen in the preceding list of techniques, the organization, alignment, and pad-

ding of data structures are all important for exploiting spatial locality and reducing

fals