Re: [BENCHMARK] 2.5.46-mm1 with contest

Alan Willis (alan@cotse.net)
Mon, 11 Nov 2002 16:11:06 -0500 (EST)


> That's an awful lot of mapped memory. Have you been altering
> /proc/sys/vm/swappiness? Has some application run berzerk
> and used tons of memory?
>
> Slab: 7592 kB
> Committed_AS: 423120 kB
> PageTables: 1996 kB
> ReverseMaps: 69425
> HugePages_Total: 15
> HugePages_Free: 15
> Hugepagesize: 4096 kB

vm.swappiness was set to 0

>
> You've lost 60 megabytes in hugepages! Bill's patch (which is in .47)
> changes the initial number of hugetlb pages to zero, which is rather
> kinder.
>
> So I don't _think_ there's a leak here. It could be that your
> normal workload fits OK ito 256 megs, but thrashes when it is
> squeezed into 196 megs.
>
> Suggest you do `echo 0 > /proc/sys/vm/nr_hugepages' and retest.

Done, vm.nr_hugepages = 0 # from 15

I'll stick to 2.5.46 for a while yet I guess, to be sure.

-alan

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