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  2. Memory access pattern - Wikipedia

    en.wikipedia.org/wiki/Memory_access_pattern

    In computing, a memory access pattern or IO access pattern is the pattern with which a system or program reads and writes memory on secondary storage.These patterns differ in the level of locality of reference and drastically affect cache performance, [1] and also have implications for the approach to parallelism [2] [3] and distribution of workload in shared memory systems. [4]

  3. Locality of reference - Wikipedia

    en.wikipedia.org/wiki/Locality_of_reference

    Memory locality (or data locality [3]): Spatial locality explicitly relating to memory. Branch locality: If there are only a few possible alternatives for the prospective part of the path in the spatial-temporal coordinate space. This is the case when an instruction loop has a simple structure, or the possible outcome of a small system of ...

  4. Memory hierarchy - Wikipedia

    en.wikipedia.org/wiki/Memory_hierarchy

    Most modern CPUs are so fast that for most program workloads, the bottleneck is the locality of reference of memory accesses and the efficiency of the caching and memory transfer between different levels of the hierarchy [citation needed]. As a result, the CPU spends much of its time idling, waiting for memory I/O to complete.

  5. Cache coherence - Wikipedia

    en.wikipedia.org/wiki/Cache_coherence

    The following are the requirements for cache coherence: [3] Write Propagation Changes to the data in any cache must be propagated to other copies (of that cache line) in the peer caches. Transaction Serialization Reads/Writes to a single memory location must be seen by all processors in the same order.

  6. Cache replacement policies - Wikipedia

    en.wikipedia.org/wiki/Cache_replacement_policies

    On a cache miss, the line with an RRPV equal to the maximum possible RRPV is evicted; with 3-bit values, a line with an RRPV of 2 3 - 1 = 7 is evicted. If no lines have this value, all RRPVs in the set are increased by 1 until one reaches it. A tie-breaker is needed, and usually, it is the first line on the left.

  7. Cache performance measurement and metric - Wikipedia

    en.wikipedia.org/wiki/Cache_performance...

    The coherence miss count is the number of memory accesses that miss because a cache line that would otherwise be present in the thread's cache has been invalidated by a write from another thread. [3] Coherence in a multi-processor system is maintained if only one copy of a memory block is present or all the copies have the same value. Even if ...

  8. Puzzle solutions for Friday, Nov. 22, 2024

    www.aol.com/news/puzzle-solutions-friday-nov-22...

    Note: Most subscribers have some, but not all, of the puzzles that correspond to the following set of solutions for their local newspaper. CROSSWORDS

  9. Least frequently used - Wikipedia

    en.wikipedia.org/wiki/Least_frequently_used

    Each time a reference is made to that block the counter is increased by one. When the cache reaches capacity and has a new block waiting to be inserted the system will search for the block with the lowest counter and remove it from the cache, in case of a tie (i.e., two or more keys with the same frequency), the Least Recently Used key would be ...