What is scalability?

@article{Hill1990WhatIS,
  title={What is scalability?},
  author={M. Hill},
  journal={SIGARCH Comput. Archit. News},
  year={1990},
  volume={18},
  pages={18-21}
}
  • M. Hill
  • Published 1990
  • Computer Science
  • SIGARCH Comput. Archit. News
Scalability is a frequently-claimed attribute of multiprocessor systems. While the basic notion is intuitive, scalability has no generally-accepted definition. For this reason, current use of the term adds more to marketing potential than technical insight.In this paper, I first examine formal definitions of scalability, but I fail to lind a useful, rigorous definition of it. I then question whether scalability is useful and conclude by challenging the technical community to either (1… Expand
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References

SHOWING 1-10 OF 20 REFERENCES
Speedup Versus Efficiency in Parallel Systems
TLDR
The tradeoff between speedup and efficiency that is inherent to a software system is investigated and it is shown that for any software system and any number of processors, the sum of the average processor utilization and the attained fraction of the maximum possible speedup must exceed one. Expand
Synchronization algorithms for shared-memory multiprocessors
A performance evaluation of the Symmetry multiprocessor system revealed that the synchronization mechanism did not perform well for highly contested locks, like those found in certain parallelExpand
On parallel searching (Extended Abstract)
  • M. Snir
  • Computer Science
  • PODC '82
  • 1982
TLDR
The complexity of seaching by comparisons a table of n elements on a synchronous, shared memory parallel computer with p processors is investigated and it is shown that it is possible to search in O(lg(n)/p) steps if more general operations are used. Expand
Relations Between Concurrent-Write Models of Parallel Computation
TLDR
This work extensively study the relationship between four shared memory models of parallel computation that allow simultaneous read/write access, and proves nontrivial separations and simulation results among them. Expand
A Benchmark Parallel Sort for Shared Memory Multiprocessors
The first parallel sort algorithm for shared memory MIMD (multiple-instruction-multiple-data-stream) multiprocessors that has a theoretical and measured speedup near linear is exhibited. It is basedExpand
Measuring parallel processor performance
TLDR
A new metric that has some advantages over the others is introduced that is illustrated with data from the Linpack benchmark report and the winners of the Gordon Bell Award. Expand
Relations between concurrent-write models of parallel computation
TLDR
By fixing the number of processors and parametrizing theNumber of shared memory cells, tight separation results between the models are obtained, thereby partially answering open questions of Vishkin [V]. Expand
Highly parallel computing
Part 1 Foundations: overview - overview and scope of this book, definition and driving forces, questions raised, emerging answers, previous attempts why success now?, conclusions and futureExpand
Parallelism in random access machines
TLDR
A model of computation based on random access machines operating in parallel and sharing a common memory is presented and can accept in polynomial time exactly the sets accepted by nondeterministic exponential time bounded Turing machines. Expand
Benchmarks for LAN performance evaluation
A technique for quickly benchmarking the performance of local area networks (LANs) is presented. Programs which model both intermittent and constant network activity are given.
...
1
2
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