[dpdk-dev] [PATCH] app: fix refcnt in mbuf allocation

[Adrien Mazarguil]

Hi all (replying below)

On Mon, May 06, 2013 at 09:28:33AM -0400, Han, Dongsu wrote:
> Sounds good. With the two bug fixes I submitted txonly now runs perfectly.
> Thanks!
> -Dongsu
> On May 6, 2013 8:47 AM, "Thomas Monjalon" <thomas.monjalon at 6wind.com> wrote:
> 
> > Hi Dongsu Han,
> >
> > I think your fix is right.
> > I've just removed tx_mbuf_alloc() and directly called rte_pktmbuf_alloc()
> > instead.
> > Is it OK for you ?
> > Could you also review this (modified) description ?
[...]

While using rte_pktmbuf_alloc() is the correct fix, it's much slower than
__rte_mbuf_raw_alloc() due to the unnecessary call to rte_pktmbuf_reset().

Since testpmd is often used for performance testing, we should consider a
wrapper function calling __rte_mbuf_raw_alloc() directly instead, as in
rte_rxmbuf_alloc() implemented in igb and ixgbe PMDs.

-- 
Adrien Mazarguil
6WIND