Analysis of space allocation in a generally fragmented linear store |
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Authors: | C H C Leung |
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Affiliation: | (1) Department of Computer Science, Birkbeck College, London University, Malet Street, WC1E 7HX London, UK |
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Abstract: | Summary The space allocation process in a fragmented linear store with general fragmentation characteristics is analysed. For a given allocation requirement t, exact expression for the n-th moment of the allocation penalty for single block contiguous allocation is obtained, which for large t is shown to be O(¯F(t)–n
), where ¯F(·) is the complementary distribution function of the free block sizes. For multiple block non-contiguous allocation, it is shown that the corresponding penalty can be approximated by an n-th degree polynomial and is O(t
n) for large t. Compared with experimental values, the model results are able to achieve good agreement. |
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Keywords: | |
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