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SUMMARY:Amdahl's Law in the Multicore Era
DTSTART:20090317T161500
DTSTAMP:20260528T235406Z
UID:e9258cf6ac054c853f8da0f96db7b2ddb741293a616d6e8eb07e2f6e
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Mark D. Hill\nOver the last several decades computer arc
 hitects have been phenomenally successful turning the transistor bounty pr
 ovided by Moore's Law into chips with ever increasing single-threaded perf
 ormance. During many of these successful years\, however\, many researcher
 s paid scant attention to multiprocessor work. Now as vendors turn to mult
 icore chips\, researchers are reacting with more papers on multi-threaded 
 systems. While this is good\, we are concerned that further work on single
 -thread performance will be squashed.\n\nTo help understand future high-le
 vel trade-offs\, we develop a corollary to Amdahl's Law for multicore chip
 s [Hill & Marty\, IEEE Computer 2008]. It models fixed chip resources for 
 alternative designs that use symmetric cores\, asymmetric cores\, or dynam
 ic techniques that allow cores to work together on sequential execution. O
 ur results encourage multicore designers to view performance of the entire
  chip rather than focus on core efficiencies. Moreover\, we observe that o
 btaining optimal multicore performance requires further research BOTH in e
 xtracting more parallelism and making sequential cores faster.\n\nThis tal
 k is based on an HPCA 2008 keynote address.\n\nMark D. Hill (http://www.cs
 .wisc.edu/~markhill) is professor in both the Computer Sciences Department
  and the Electrical and Computer Engineering Department at the University 
 of Wisconsin-Madison\, where he also co-leads the Wisconsin Multifacet pro
 ject with David Wood. He earned a Ph.D. from the University of California\
 , Berkeley. He is an ACM Fellow and a Fellow of the IEEE. His past work ra
 nges from refining multiprocessor memory consistency models to developing 
 the 3C model of cache behaviour (compulsory\, capacity\, and conflict miss
 es).Prof. Mark's home page
LOCATION:BC 410 https://plan.epfl.ch/?room==BC%20410
STATUS:CONFIRMED
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