[dpdk-users] Memory allocation limits

[Burakov, Anatoly]

> -----Original Message-----
> From: Thomas Monjalon <thomas at monjalon.net>
> Sent: Wednesday, September 29, 2021 12:12 PM
> To: Mohammad Masumi <mmasumi at gmail.com>; Burakov, Anatoly
> <anatoly.burakov at intel.com>
> Cc: users at dpdk.org; dmitry.kozliuk at gmail.com; Richardson, Bruce
> <bruce.richardson at intel.com>; stephen at networkplumber.org
> Subject: Re: [dpdk-users] Memory allocation limits
> 
> 29/09/2021 12:14, Burakov, Anatoly:
> > From: Thomas Monjalon <thomas at monjalon.net>
> > > 26/09/2021 17:52, Mohammad Masumi:
> > > > Hi
> > > >
> > > > I have HP server with 768GB memory 384GB in each Numa but I can't
> > > > allocate more than 64GB by rte_malloc by changing some parameters
> > > > in rte_config.h it increased to 128GB How to increase heap size?
> > >
> > > adding people Cc to help
> > >
> >
> > Hi,
> >
> > This is intentional. In order to increase the amount of contiguous allocation
> possible to perform in DPDK, you need to adjust the following values in
> rte_config.h:
> >
> > #define RTE_MAX_MEMSEG_PER_LIST 8192
> > #define RTE_MAX_MEM_MB_PER_LIST 32768
> > #define RTE_MAX_MEMSEG_PER_TYPE 32768
> > #define RTE_MAX_MEM_MB_PER_TYPE 65536
> >
> > I do not recommend arbitrarily changing them as this is untested, but
> increasing them proportionally (e.g. multiply all of them by 2 or 4) should not
> break anything.
> 
> It looks to be something to add in docs, right?
> 

[[AB]] 
Yes, which is why I already have 😃

http://doc.dpdk.org/guides/prog_guide/env_abstraction_layer.html#memory-mapping-discovery-and-memory-reservation

There's a section on "Maximum amount of memory" there.