Re: [PATCH 2/3] x86/flush_tlb: try flush_tlb_single one by one inflush_tlb_range

[Alex Shi]

>>
>> I tested oltp reading and specjbb2005 with openjdk. They should not much
>> flush_tlb_range calling. So, no clear improvement.
>> Do you know benchmarks which cause enough flush_tlb_range?
> 
> x86 does not do such invlpg flushing for munmap either, as far as I
> can see?
> 
> It would be a little more work to make this happen, but it might show
> more benefit, provided glibc does not free too huge chunks at once,
> it should apply far more often.




I enabled invlpg for munmap and zap_page_range base on v2 of this patchset.
but still haven't find clear performance increase for benchmarks: 
specjbb2005/kbuild/hackbench/netperf-loop/oltp/fileio etc. with THP always.

Does anyone know some benchmark has much munmap?

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