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SubjectRe: TPC-C benchmark used standard RH kernel
>> This isn't as recent as I would like, but it will give you an idea.
>> Top 75 from readprofile. This run was not using bigpages though.
>> Andy
>
>> 00000000 total 7872 0.0066
>> c0105400 default_idle 1367 21.3594
>> c012ea20 find_vma_prev 462 2.2212
>> c0142840 create_bounce 378 1.1250
>> c0142540 bounce_end_io_read 332 0.9881
>> c0197740 __make_request 256 0.1290
>> c012af20 zap_page_range 231 0.1739
>> c012e9a0 find_vma 214 1.6719
>> c012e780 avl_rebalance 160 0.4762
>
> Looks like you're doing a lot of mmapping or faulting requiring VMA
> lookups, or the number of VMA's associated with a task makes the
> various VMA manipulations extremely expensive.
>
> Can you dump /proc/pid/maps on some of these processes?

Isn't that the magic Oracle 32Kb mmap hack at work here, in order
to get a >2Gb SGA?

M.

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