[dpdk-dev] Ability to/impact of running with smaller page sizes

Matt Laswell laswell at infiniteio.com
Tue Jul 1 14:36:42 CEST 2014


Thanks everybody,

It sounds as though what I'm looking for may be possible, especially with
1.7, but will require some tweaking and there will most definitely be a
performance hit.  That's great information.  This is still just an
experiment for us, and it's not at all guaranteed that I'm going to move
towards smaller pages, but I very much appreciate the insights.

--
Matt Laswell


On Tue, Jul 1, 2014 at 6:51 AM, Burakov, Anatoly <anatoly.burakov at intel.com>
wrote:

> Hi Matt,
>
> > I'm curious - is it possible in practical terms to run DPDK without
> hugepages?
>
> Starting with release 1.7.0, support for VFIO was added, which allows
> using  DPDK without hugepages at al (including RX/TX rings) via the
> --no-huge command-line parameter. Bear in mind though that you'll have to
> have IOMMU/VT-d enabled (i.e. no VM support, only host-based) and also have
> supported kernel version (3.6+) as well to use VFIO, the memory size will
> be limited to 1G, and it won't work with multiprocess. I don't have any
> performance figures on that unfortunately.
>
> Best regards,
> Anatoly Burakov
> DPDK SW Engineer
>


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