4. 2 Code Segments . . . . . . . . . . . . . . . 96 4. 3 Determining Communication Parameters . 99 4. 4 Multicast Communication Overhead · 103 4. 5 Partitioning . . . . . . · 103 4. 6 Experimental Results . 117 4. 7 Conclusion. . . . . . . · 121 5 COLLECTIVE PARTITIONING AND REMAPPING FOR MULTIPLE LOOP NESTS 125 5. 1 Introduction. . . . . . . . . 125 5. 2 Program Enclosure Trees. . 128 5. 3 The CPR Algorithm . . 132 5. 4 Experimental Results. . 141 5. 5 Conclusion. . 146 BIBLIOGRAPHY. 149 INDEX . . . . . . . . 157 LIST OF FIGURES Figure 1. 1 The Butterfly Architecture. . . . . . . . . . 5 1. 2 Example of an iterative data-parallel loop . . 7 1. 3 Contiguous tiling and assignment of an iteration space. 13 2. 1 Communication along a line segment. . . 24 2. 2 Access pattern for the access offset, (3,2). 25 2. 3 Decomposing an access vector along an orthogonal basis set of vectors. . . . . . . . . . . . . . . . . . . 26 2. 4 An analysis of communication patterns. 29 2. 5 Decomposing a vector along two separate basis sets of vectors. 31 2. 6 Cache lines aligning with borders. 33 2. 7 Cache lines not aligned with borders. 34 2. 8 nh is the difference of nd and nb. 42 2. 9 nh is the sum of nd and nb. 42 2. 10 The ADAPT system. 44 2. 11 Code segment used in experiments. . 46 2. 12 Execution rates for various partitions. 47 2. 13 Execution time of partitions on Multimax. 48 2. 14 Performance increase as processing power increases. 49 2. 15 Percentage miss ratios for various aspect ratios and line sizes.
Reihe
Auflage
Sprache
Verlagsort
Zielgruppe
Für höhere Schule und Studium
Für Beruf und Forschung
Research
Illustrationen
Maße
Höhe: 241 mm
Breite: 160 mm
Dicke: 15 mm
Gewicht
ISBN-13
978-0-7923-9283-5 (9780792392835)
DOI
10.1007/978-1-4615-3164-7
Schweitzer Klassifikation
1 Introduction.- 1.1 Model Assumptions.- 1.2 Related Work.- 1.3 Overview.- 2 Contiguous Loop Partitions for Neighborhood Communication.- 2.1 Introduction.- 2.2 Quantifying Communication.- 2.3 Compensation for Cache Line Size.- 2.4 Partition Construction.- 2.5 Experimental Evaluation of ADP.- 2.6 Conclusion.- 3 Contiguous Data Assignments for Neighborhood Communication.- 3.1 Introduction.- 3.2 Data Assignments.- 3.3 Exploiting Overlap.- 3.4 Software Redundancy.- 3.5 ADAPT.- 3.6 Experimental Results.- 3.7 Conclusion.- 4 Cyclic Loop Partitions for Linearly Varying Loops.- 4.1 Introduction.- 4.2 Code Segments.- 4.3 Determining Communication Parameters.- 4.4 Multicast Communication Overhead.- 4.5 Partitioning.- 4.6 Experimental Results.- 4.7 Conclusion.- 5 Collective Partitioning and Remapping for Multiple Loop Nests.- 5.1 Introduction.- 5.2 Program Enclosure Trees.- 5.3 The CPR Algorithm.- 5.4 Experimental Results.- 5.5 Conclusion.
