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Aydin_CSC11_Indexing

log p p p p nnz a tcomm

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Unformatted text preview: ribu4ons, interleaved on each other. x1,3 ! ! x1 !  ­ Performance change is marginal (dominated by SpGEMM)  ­ Scalable with increasing number of processes  ­ No significant load imbalance Complexity analysis SpGEMM: Tcomp $ nnz( A) $ length( I ) length( J ) '' ! "& # log & + + p )) p p % (( %p # nnz( A) & Tcomm = ! %! " p + " " ( % ( p' $ Matrix formaDon: Dominated by SpGEMM Bopleneck: bandwidth costs Speedup: " p () # length( I ) + length( J ) & ! %! " log( p) + " " ( % ( p $ ' ! Assump4ons:  ­ The triple product...
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