2007/5/29, Antonino Ingargiola <tritemio@gmail.com>:
[cut]
quoted text
> Swap Prefetch OFF
> # ./sp_tester
> Ram 776388000  Swap 514040000
> Total ram to be malloced: 1033408000 bytes
> Starting first malloc of 516704000 bytes
> Starting 1st read of first malloc
> Touching this much ram takes 1642 milliseconds
> Starting second malloc of 516704000 bytes
> Completed second malloc and free
> Sleeping for 60 seconds
> Important part - starting reread of first malloc
> Completed read of first malloc
> Timed portion 9089 milliseconds
>
>
> Swap Prefetch OFF
> # ./sp_tester
> Ram 776388000  Swap 514040000
> Total ram to be malloced: 1033408000 bytes
> Starting first malloc of 516704000 bytes
> Starting 1st read of first malloc
> Touching this much ram takes 1635 milliseconds
> Starting second malloc of 516704000 bytes
> Completed second malloc and free
> Sleeping for 60 seconds
> Important part - starting reread of first malloc
> Completed read of first malloc
> Timed portion 1783 milliseconds

The second case is clearly with swap prefetch *ON*, sorry.


     ~  Antonio
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