On Jun 5, 2013, at 9:17 PM, Thomas R Gissel <[email protected]> wrote:
> I too have been trying to reproduce the existence of Private_Clean memory
> segments in smaps via a simple test case with jemalloc and was unable to on
> my laptop, a 2 core machine running a 3.8.0-23 kernel . I then moved my test
> to our production box: 96GB memory, 24 hardware threads and 2.6 kernel
> (detailed information below), and within a few minutes of execution, with a
> few minor adjustments, I was able duplicate the results, smaps showing the
> jemalloc segment with Private_Clean memory usage, of our larger test. Note
> that I'm using the same jemalloc library whose information Kurtis posted
> earlier (96 arenas etc...).
>
Interesting! I don't see anything unusual about the test program, so I'm
guessing this is kernel-specific. I'll run it on some 8- and 16-core machines
tomorrow with a couple of kernel versions and see what happens.
Thanks,
Jason
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