chapter1-AppendixA-m4-ziavras

chapter1-AppendixA-m4-ziavras - ECE 690 NJIT Computer...

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ECE 690 - NJIT Computer Systems Architecture Chapter 1, Module 4 Fundamentals of Quantitative Design & Analysis Prof. Sotirios G. Ziavras © Copyright S. Ziavras Some material is adapted from D. Culler & D. Patterson (UCB)
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Tracking Technology Performance Trends 4 technologies Disks Memory Network Processors Compare ~1980 Archaic (Nostalgic) vs (Nostalgic) vs. ~2000 Modern (Newfangled/innovative/novel) Performance Milestones in each technology Compare for Bandwidth vs Latency Bandwidth vs. Latency improvements in performance over time Bandwidth : number of events per unit time E M bit / d t k M b t / d f E.g., M bits / second over network, M bytes / second from disk Latency : elapsed time for a single event E g one way network delay in microseconds S. Ziavras Some material is adapted from D. Culler & D. Patterson (UCB) E.g., one-way network delay in microseconds, average disk access time in milliseconds
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Disks: Archaic vs. Modern Seagate 373453, 2003 15000 RPM (4X) CDC Wren I, 1983 3600 RPM 73.4 GBytes (2500X) Tracks/Inch: 64000 (80X) 0.03 GBytes capacity Tracks/Inch: 800 Bits/Inch: 533,000 (60X) Four 2.5” platters (in 3 5” form factor) Bits/Inch: 9550 Three 5.25” platters (in 3.5 form factor) Bandwidth: 86 MBytes/sec (140X) Bandwidth: 0.6 MBytes/sec Latency: 5.7 ms (8X) Cache: 8 MBytes Latency: 48.3 ms Cache: none S. Ziavras Some material is adapted from D. Culler & D. Patterson (UCB)
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