prefetch-trigger-distance · research

Prefetch trigger distance

Prefetch trigger distance specifies how far before the end of an already-prefetched sequence the next prefetch is initiated.

In AMP, g = 0 places the trigger on the last page; batch size p and trigger distance g are separate controls. [1]

This policy variable is not a Linux readahead syscall argument or a nonblocking-I/O guarantee. [2]

Relations

related

prefetch-wastage, readahead, posix-fadv-willneed, cache-pollution, page-cache

Citations

1. Binny S. Gill and Luis Angel D. Bathen. AMP: Adaptive Multi-stream Prefetching in a Shared Cache. FAST 2007, pp. 185-198; sections II-VI. (accessed 2026-10-18)
2. Hesela: fetch size, trigger timing and prefetch diagnostic evidence (accessed 2026-10-18)

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