Line size of L1 and L2 caches

Cache-Lines size is (typically) 64 bytes.

Moreover, take a look at this very interesting article about processors caches:
Gallery of Processor Cache Effects

You will find the following chapters:

  1. Memory accesses and performance
  2. Impact of cache lines
  3. L1 and L2 cache sizes
  4. Instruction-level parallelism
  5. Cache associativity
  6. False cache line sharing
  7. Hardware complexities

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