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L1 Cache performance

S

sharkeeper

Lifer
Why does a system (no matter how fast the cpu is) run like it has a 25 year old CPU if the L1 cache is disabled? I can disable the L2 cache on most users' machines and they would never notice. Disable the L1 cache and they'll be screaming mad!

Cheers!
 
Without L1 cache, data and instruction fetches would be very slow. For each request for data or instructions, there'd be a 7 clock wait before that data or instruction can be found and transfered to the processor. This can effectively hamper performance by almost 7 fold in the best case (the case of the P4's 7 cycle access L2 cache).
 
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