Multiple Outstanding Mem Refs

• Processor can support 4 outstanding memory requests

• Timing linked list references:

• while(x) x=x->p;

• #outstanding ref time per pointer fetch:

• 1 230 ns (480 ns)

• 2 160 ns (250 ns)

• 4 110 ns (240 ns)

“Sequential” cache miss

“Parallel” cache miss

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