[dpdk-users] Memory allocation limits

[Thomas Monjalon]

29/09/2021 14:43, Burakov, Anatoly:
> From: Thomas Monjalon <thomas at monjalon.net>
> > 29/09/2021 12:14, Burakov, Anatoly:
> > > From: Thomas Monjalon <thomas at monjalon.net>
> > > > 26/09/2021 17:52, Mohammad Masumi:
> > > > > 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?
> > >
> > > 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.

It says "Normally, these options do not need to be changed."
Would it be meaningful to add how we can increase (by multiplying all of them)?