Re: [dpdk-dev] error in testpmd when CONFIG_RTE_BUILD_SHARED_LIB=y

[Shreyansh Jain <shreyansh.jain@nxp.com>]

> -----Original Message-----
> From: Bruce Richardson [mailto:bruce.richardson@intel.com]
> Sent: Wednesday, April 12, 2017 3:35 PM
> To: Shreyansh Jain <shreyansh.jain@nxp.com>
> Cc: Thomas Monjalon <thomas.monjalon@6wind.com>; john miller
> <john.miller@atomicrules.com>; dev@dpdk.org; olivier.matz@6wind.com
> Subject: Re: [dpdk-dev] error in testpmd when CONFIG_RTE_BUILD_SHARED_LIB=y
> 
> On Wed, Apr 12, 2017 at 04:52:47AM +0000, Shreyansh Jain wrote:
> > > -----Original Message-----
> > > From: Thomas Monjalon [mailto:thomas.monjalon@6wind.com]
> > > Sent: Wednesday, April 12, 2017 12:58 AM
> > > To: john miller <john.miller@atomicrules.com>
> > > Cc: dev@dpdk.org; olivier.matz@6wind.com; Shreyansh Jain
> > > <shreyansh.jain@nxp.com>
> > > Subject: Re: [dpdk-dev] error in testpmd when
> CONFIG_RTE_BUILD_SHARED_LIB=y
> > >
> > > 2017-04-11 14:02, john miller:
> > > >
> > > > We are seeing an issue when running from the head of the master branch
> in
> > > dpdk-next-net and building with CONFIG_RTE_BUILD_SHARED_LIB=y.   When we
> run
> > > testpmd using  -d to point to our PMD we get this error
> > > >
> > > > EAL: Error - exiting with code: 1
> > > >   Cause: Creation of mbuf pool for socket 0 failed: Invalid argument
> > > >
> > > > This error occurs as a result of the rte mempool ops table having 0
> > > entries.  This table is populated from a call to
> rte_mempool_register_ops().
> > > This function gets called in rte_mempool_ring.c via the static
> initialization
> > > MACRO MEMPOOL_REGISTER_OPS and exists in librte_mempool_ring.so.  However
> > > this library is not loaded when the rte_eal_init() gets called so the
> static
> > > initializers are not yet loaded.
> > > >
> > > > I am requesting advice on the proper way to repair this.
> >
> > "-d" the ring library (rte_mempool_ring) - just like any other shared lib.
> >
> 
> I think this is a bug that should be fixed. The user should not need to
> have to specify a mempool driver just to get testpmd working, so I think
> the ring handler as default should be compiled in automatically so as to
> allow regular mempools to just work as before.
 
For Ring Mempool as default enabled, +1

> 
> > This change was done recently to move ring handler into its separate
> drivers/mempool/ring directory. That also means it no longer is compiled into
> the librte_mempool.
> >
> > >
> > > We should just add a better error message if no mempool driver is
> available.
> >
> > Yes, that is something to be improved.
> 
> This should be fixed by always having a mempool driver installed.
 
Agree.
Otherwise also, the framework seems to be replying with a valid code 'EINVAL' for an invalid mempool specified.

> 
> /Bruce