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Books > Computing & IT > Computer hardware & operating systems > Computer architecture & logic design
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A Primer on Hardware Prefetching (Paperback)
Loot Price: R742
Discovery Miles 7 420
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A Primer on Hardware Prefetching (Paperback)
Series: Synthesis Lectures on Computer Architecture
Expected to ship within 18 - 22 working days
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Since the 1970's, microprocessor-based digital platforms have been
riding Moore's law, allowing for doubling of density for the same
area roughly every two years. However, whereas microprocessor
fabrication has focused on increasing instruction execution rate,
memory fabrication technologies have focused primarily on an
increase in capacity with negligible increase in speed. This
divergent trend in performance between the processors and memory
has led to a phenomenon referred to as the "Memory Wall." To
overcome the memory wall, designers have resorted to a hierarchy of
cache memory levels, which rely on the principal of memory access
locality to reduce the observed memory access time and the
performance gap between processors and memory. Unfortunately,
important workload classes exhibit adverse memory access patterns
that baffle the simple policies built into modern cache hierarchies
to move instructions and data across cache levels. As such,
processors often spend much time idling upon a demand fetch of
memory blocks that miss in higher cache levels.
Prefetching-predicting future memory accesses and issuing requests
for the corresponding memory blocks in advance of explicit
accesses-is an effective approach to hide memory access latency.
There have been a myriad of proposed prefetching techniques, and
nearly every modern processor includes some hardware prefetching
mechanisms targeting simple and regular memory access patterns.
This primer offers an overview of the various classes of hardware
prefetchers for instructions and data proposed in the research
literature, and presents examples of techniques incorporated into
modern microprocessors.
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