On Sat, Jun 09, 2012 at 10:31:17AM +0300, Mikolaj Golub wrote: > > On Fri, 1 Jun 2012 14:54:48 +0200 Ivan Voras wrote: > > IV> On 1 June 2012 14:35, Wojciech Puchar <woj...@wojtek.tensor.gdynia.pl> > wrote: > >>> http://people.freebsd.org/~ivoras/stuff/spsurvey.py > > ... > > IV> If anyone posts more data, I'll analyse it. I'm more worried about the > IV> granularity of procstat, where it marks the entire region if a single > IV> superpage exists in it - it means any such analysis is only > IV> approximate. > > Here is a patch (for kernel and procstat) that allows to see amount of pages > mapped to superpages. > > http://people.freebsd.org/~trociny/procstat-superpages.cnt.1.patch > > Not sure it is useful enough to be committed.
Superpage aggregates mappings for several normal-sized pages. As a consequence, when you iterate over small pages in sysctl_kern_proc_vmmap(), you account each superpage as many time as much constituent small pages it contains.
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