On the Parallelization of Stream Compaction on a Low-Cost SDC Cluster

Algorithm 2

Parallel stream compaction.

	Input: Vector I of length n
	Input: Predicate function F
	Input: Number of processes p
	Input: pid of process
	Output: Vector O of valid elements
	Output: nvalid: the number of valid elements
	Output: pos: position to write
(1)
(2)
(3)
(4)	for to in parallel do
(5)	if then
(6)
(7)	end if
(8)	end for
(9)	for to in parallel do
(10)
(11)	end for
(12)
(13)	for to in parallel do
(14)	Send nvalid to process
(15)	end for
(16)	if then
(17)	for to in parallel do
(18)	Receive
(19)
(20)	end for
(21)	end if
(22)	for to in parallel do
(23)	if then
(24)
(25)	end if
(26)	end for