Re: Regarding DPDK API's like rte_timer_subsystem_init/rte_hash_create etc. in VPP

[Prashant Upadhyaya <praupadhyaya@gmail.com>]

Hi,

The hash creation API throws the following error --
RING: Cannot reserve memory for tailq
HASH: memory allocation failed

The timer subsystem init api throws this error --
EAL: memzone_reserve_aligned_thread_unsafe(): Number of requested
memzone segments exceeds RTE_MAX_MEMZONE

I did check the code and apparently the memzone and rte zmalloc
related api's are not being able to allocate memory.

Regards
-Prashant

On Thu, Mar 30, 2023 at 1:30 PM Bruce Richardson
<bruce.richardson@intel.com> wrote:
>
> On Thu, Mar 30, 2023 at 10:30:24AM +0530, Prashant Upadhyaya wrote:
> > Hi,
> >
> > While trying to port some code to VPP (which uses DPDK as the backend
> > driver), I am running into a problem that calls to API's like
> > rte_timer_subsystem_init, rte_hash_create are failing while allocation
> > of memory.
> >
> > This is presumably because VPP inits the EAL with the following arguments --
> >
> > -in-memory --no-telemetry --file-prefix vpp
> >
> > Is  there is something that can be done eg. passing some more parms in
> > the EAL initialization which hopefully wouldn't break VPP but will
> > also be friendly to the RTE timer and hash functions too, that would
> > be great, so requesting some advice here.
> >
> Hi,
>
> can you provide some more details on what the errors are that you are
> receiving? Have you been able to dig a little deeper into what might be
> causing the memory failures? The above flags alone are unlikely to cause
> issues with hash or timer libraries, for example.
>
> /Bruce