[dpdk-dev] Ability to/impact of running with smaller page sizes
Liu, Jijiang
jijiang.liu at intel.com
Tue Jul 1 10:56:43 CEST 2014
Hi Matt,
On Mon, Jun 30, 2014 at 05:43:39PM -0500, Matt Laswell wrote:
> Hey Folks,
>
> In my application, I'm seeing some design considerations in a project
> I'm working on that push me towards the use of smaller memory page
> sizes. I'm curious - is it possible in practical terms to run DPDK without hugepages?
> If so, does anybody have any practical experience (or a
> back-of-the-envelop estimate) of how badly such a configuration would
> hurt performance? For sake of argument, assume that virtually all of
> the memory being used is in pre-allocated mempools (e.g lots of
> rte_mempool_create(), very little rte_malloc().
>
There is an case to run DPDK without hugepages in DPDK source codes, which is DPDK supports Xen Dom0. for this, we developed a dom0_mm driver.
Except for Xen Dom0, it is impossible to run DPDK without hugepages without any changes at memory initialization phase, but current rte_memzone_reserve_bounded() and
rte_mempool_xmem_create() implemention have already support non-hugepage usage in DPDK.
Thanks,
Jeff
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