prefetch

(redirected from prefetches)

prefetch

prefetch

To bring data or instructions into a higher-speed storage or memory before it is actually processed. See cache.
References in periodicals archive ?
In this strategy the peer just predicts the next seeking state and sequentially prefetches the segments in the predicted state into its prefetch buffer according to its download bandwidth.
Then, when a cache-line is brought into the cache it also effectively prefetches the data that is to be needed in the near future.
A major problem with fetching pages before they are really needed is that such prefetching may increase the amount of I/O traffic dramatically due to useless prefetches.
Starting a prefetch too early might force us to evict blocks which are requested fairly soon so that we have to initiate more prefetches to avoid stalling for these blocks.
In this figure, the prefetches for references r1 and r2 are issued too late to avoid processor stalls, although the data for r2 is fetched early enough to realize some benefit.
To cover branch targets that do not fall within these N prefetched cache lines, wrong-path prefetching [Pierce and Mudge 1996] always prefetches the target address of control transfer instructions (with static addresses) in addition to the next N sequential lines.
Prefetches cannot be issued in the source code, so we were unable to try this optimization.
If the available bandwidth permits these p prefetches, then this will make all references appear as if they are in fast cache memory, rather than in slower main memory.
Byte count enables initiator to specify in advance the specific number of bytes requested, eliminating the inefficiency of speculative prefetches
The automatic tape mechanism only prefetches the pages containing these pointers, not the pages containing the molecules themselves.
The client specifies the depth of prefetching for pages while the server automatically prefetches in-lined images.