Techniql Es to Provide Run-time Support for Solving Irregular T Problems *

resent a runtime library design I/O technique for irregular application. The design is motivated by the requirements of a e number of ASCI (Accelerated Strategic Computir iative) applications, although the design and intc general enough to be used ions. We present two deand “Pipelined Collective I/O”. In tl scheme, all processors participate in the I/O same time, making scheduling of I/O requests r but creating a possibility of contention at the 1 des. In the second approach, processors are grou veral groups, so that only one group perform: ltaneously, while the next group performs co7 nication to rearrange data, and this entire process pipelined. This reduces the con-