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Goals of This Talk• Give insight
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Topics For Ninjas• Topics relevan
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EXPOSING SUFFICIENT PARALLELISM© 2
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Memory Parallelism• Achieved Kepl
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Occupancy• Occupancy: number of c
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Exposing Parallelism: Grid Configur
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Threadblock SizingToo fewthreadsper
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Case Study 1: Threadblock Sizing•
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Tail Effect• Tail underutilizes G
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Tail Effect: Large vs Small Threadb
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General Guidelines• Threadblock s
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Kepler Memory HierarchySM-0Register
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Blocking for L1, Read-only, L2 Cach
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Global Memory Operations• Memory
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Read-only Loads• Go through the r
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Read-only Loads• Go through the r
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Caching Load• Scenario:- Warp req
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Caching Load• Scenario:- Warp req
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Caching Load• Scenario:- Warp req
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Caching Load• Scenario:- All thre
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Caching Load• Scenario:- Warp req
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Memory Throughput Analysis• Two p
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Two Ways to Investigate Address Pat
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Pattern Category: Offset Access•
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Case Study 2: Offset Address Patter
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Case Study 2: Remedy• Looking at
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Pattern Category 2: Large Inter-thr
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Case Study 3: Diagnosis• Double-p
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Case Study 3: Result• Naïve impl
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Case Study 4: SoA vs AoS• Global
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Case Study 4: Cause• Array of Str
- Page 66 and 67: Case Study 5: Assigning More Thread
- Page 68 and 69: Case Study 5: Cause and Remedy• E
- Page 70 and 71: Pattern Category 4: Irregular Addre
- Page 72 and 73: Summary of Pattern Categories and t
- Page 74 and 75: Having Sufficient Concurrent Access
- Page 76 and 77: Optimizing Access Concurrency• Ha
- Page 78 and 79: Summary: GMEM Optimization• Striv
- Page 80 and 81: Shared Memory• On-chip (on each S
- Page 82 and 83: Kepler 8-byte Bank Mode• Mapping
- Page 84 and 85: Kepler 4-byte Bank Mode• To visua
- Page 86 and 87: Case Study 6: Kepler 8-byte SMEM Ac
- Page 88 and 89: SMEM Access ExamplesAddresses from
- Page 90 and 91: SMEM Access ExamplesAddresses from
- Page 92 and 93: SMEM Access ExamplesAddresses from
- Page 94 and 95: Case Study 7: Matrix Transpose• S
- Page 96 and 97: Summary: Shared Memory• Shared me
- Page 98 and 99: Execution• Instructions are issue
- Page 100 and 101: instructionsControl Flowif ( ... ){
- Page 102 and 103: instructions / timeExecution diverg
- Page 104 and 105: Instruction Throughput: Analysis•
- Page 106 and 107: Instruction Throughput: Summary•
- Page 108 and 109: Kepler Architecture Family• Two a
- Page 110 and 111: Level of Parallelism• Parallelism
- Page 112 and 113: Increased Shared Memory Bandwidth
- Page 114 and 115: Case Study 8: More Registers Per Th