[dpdk-users] Memory allocation limits

[Burakov, Anatoly]

> -----Original Message-----
> From: Thomas Monjalon <thomas at monjalon.net>
> Sent: Wednesday, September 29, 2021 10:59 AM
> To: Mohammad Masumi <mmasumi at gmail.com>
> Cc: users at dpdk.org; Burakov, Anatoly <anatoly.burakov at intel.com>;
> dmitry.kozliuk at gmail.com; Richardson, Bruce
> <bruce.richardson at intel.com>; stephen at networkplumber.org
> Subject: Re: [dpdk-users] Memory allocation limits
> 
> 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.

Thanks,
Anatoly