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Pastimes : Dream Machine ( Build your own PC )

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To: Clarence Dodge who wrote (2367)	9/8/1998 1:02:00 PM
From: Spots	Read Replies (2) of 14778

>>curious about how cache is used in real-time streaming data. The processor cache (L1 and L2) buffer memory accesses. Depending on the pattern of access, they can make effective memory speeds several times faster than actual memory speeds. Streaming data or anything else that enters memory will be stored in cache. If it is referenced again soon enough, it will be fetched from cache rather than from main memory. Since disk I/O is itself "cached" by the OS in memory, and this memory is subject to processor caching, even if the streaming data is written to disk then refetched "from disk" it will actually come from the processor cache that holds the disk cache, provided the pattern of access is conducive to that. In short, cache is valuable for ANY data access. The more the better. "Celeron" should have been named deCeleron, but I don't suppose that would spin so will in the marketplace <G>.

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