Messages in this thread | | | Date | Thu, 05 Apr 2007 03:39:29 -0400 | From | Rik van Riel <> | Subject | Re: missing madvise functionality |
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Rik van Riel wrote:
> MADV_DONTNEED, unpatched, 1000 loops > > real 0m13.672s > user 0m1.217s > sys 0m45.712s > > > MADV_DONTNEED, with patch, 1000 loops > > real 0m4.169s > user 0m2.033s > sys 0m3.224s
I just noticed something fun with these numbers.
Without the patch, the system (a quad core CPU) is 10% idle.
With the patch, it is 66% idle - presumably I need Nick's mmap_sem patch.
However, despite being 66% idle, the test still runs over 3 times as fast!
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