'Sort locally' presentation slideshows

Adding numbers

Adding numbers. n data items, p processors. t s = O(n). t p = O(n/p) if data on each proc => S=t s /t p =O(p). t p = O(n + n/p) if data needs broadcasting => S=t s /t p =o(1). Sequential Recursion. Parallel Recursion. t comm = O(n/2 +n/4 + ..+ n/p) = O(n). S=o(1).

468 views • 40 slides