On Mon, Jun 13, 2011 at 10:57:08PM +0800, Yu Huang wrote:
> Thanks for David and Eric's suggestion!
>
> Before I submit the updated patch I would like to show some testing
> result under mips arch. I used NPB3.3-SER as the benchmark to test
> libhugetlbfs for MIPS, here is a sample result:
>
> ======================================================================
> BEFORE using libhugetlbfs for MIPS:
>
> IS Benchmark Completed
> Class = A
> Size = 8388608
> Iterations = 10
> Time in seconds = 25.54
> Mop/s total = 3.29
> ----------------------------------------------------------------
> AFTER using libhugetlbfs for MIPS:
>
> #hugeedit --text --data ./bin/is.A
IIRC, if you're using "new style" hugepage relinking, you shouldn't
need hugeedit.
> #HUGETLB_ELFMAP=RW ./bin/is.A
>
> IS Benchmark Completed
> Class = A
> Size = 8388608
> Iterations = 10
> Time in seconds = 8.74
> Mop/s total = 9.60
> =======================================================================
>
> From the result we can see that after using libhugetlbfs operations per
> second of IS increased from 3.29Mop/s to 9.60Mop/s. That's a significant
> improvement!
Heh, no. 20% is a significant improvement. 200% is a enormous
improvement.
Although the fact that the change is so huge suggests your MMU sucked
rather badly to begin with...
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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