Re: [PATCH 6/7] x86: mm: set TLB flush tunable to sane value

From: Davidlohr Bueso
Date: Thu Mar 06 2014 - 20:55:21 EST


On Wed, 2014-03-05 at 16:45 -0800, Dave Hansen wrote:
> From: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
>
> Now that we have some shiny new tracepoints, we can actually
> figure out what the heck is going on.
>
> During a kernel compile, 60% of the flush_tlb_mm_range() calls
> are for a single page. It breaks down like this:

It would be interesting to see similar data for opposite workloads with
more random access patterns. That's normally when things start getting
fun in the tlb world.

Thanks,
Davidlohr

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