> -----Original Message----- > From: Olivier Matz [mailto:olivier.matz at 6wind.com] > Sent: Thursday, July 30, 2015 5:22 PM > To: dev at dpdk.org > Cc: Ananyev, Konstantin; olivier.matz at 6wind.com; Zhang, Helin; > martin.weiser at allegro-packets.com; thomas.monjalon at 6wind.com > Subject: [PATCH v2] mbuf: enforce alignment of mbuf private area > > It looks better to have a data buffer address that is aligned to > 8 bytes. This is the case when there is no mbuf private area, but > if there is one, the alignment depends on the size of this area > that is located between the mbuf structure and the data buffer. > > Indeed, some drivers expects to have the buffer address aligned > to an even address, and moreover an unaligned buffer may impact > the performance when accessing to network headers. > > Add a check in rte_pktmbuf_pool_create() to verify the alignment > constraint before creating the mempool. For applications that use > the alternative way (direct call to rte_mempool_create), also > add an assertion in rte_pktmbuf_init(). > > By the way, also add the MBUF log type. > > Signed-off-by: Olivier Matz <olivier.matz at 6wind.com> > ---
Acked-by: Konstantin Ananyev <konstantin.ananyev at intel.com>
