Idletime Scheduling with Preemption Intervals - Lars Eggert

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24 Lars Eggert Disk Setup • UFS file system, random data • single disk, isolated ATA channel • 8.2GB Western Digital Caviar AC28200 • 15ms maximum seek + 5ms latency (mean) • FG + BG randomly read 512-byte blocks • Pentium III SMP, 733Mhz, 512MB RAM 2005-10-26
25 Disk: Random Access • FG > 80%, BG ≤ 90% of baseline throughput • 20% impact ~ 1 BG request (20ms seek) Lars Eggert 2005-10-26
Page 1 and 2: Idletime Scheduling with Preemption
Page 3 and 4: 3 Lars Eggert Challenges • syste
Page 5 and 6: 5 Applications & Benefits • prefe
Page 7: 7 1. isolation Idletime Principles
Page 10: 10 Lars Eggert Idea • work conse
Page 13 and 14: 13 Idletime Scheduler • priority
Page 15 and 16: 15 shorter PI utilize more idle cap
Page 17 and 18: 17 Lars Eggert Long PIs • too lo
Page 20 and 21: 20 Implementation • localized mod
Page 22 and 23: 22 • FG/BG throughput Lars Eggert
Page 26 and 27: 26 Network Setup • direct, isolat
Page 28 and 29: 28 Network TCP/UDP • worst case:
Page 30 and 31: 30 Related Work (2) • idle capaci
Page 32: 32 • generic idletime scheduler b

Idletime Scheduling with Preemption Intervals - Lars Eggert

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