From: joefoxreal@gmail.com   
      
   Hi,   
      
   I'm tuning the compiler on benchmark using data prefetching. But the time   
   that the test spends varies for each run. It's hard to say whether the   
   tuning if better or worse.   
      
   Is there any good way to avoid the fluctuations caused by cache?   
      
   Thanks,   
   Eric   
      
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