> On Dec 20, 2017, at 2:04 AM, Bin Huang <huangbin.ma...@gmail.com> wrote: > > pktgen pre-allocated TX data in mbuf would be modified by virtio pmd driver > due to virtio pkt head extension. > it will caused mbuf data_len keep growing, packets size on wire growing, then > tx pps performance drop. > > set corresponding mbuf data_len in pktmbuf reset to fix it. > > Signed-off-by: Bin Huang <huangbin.ma...@gmail.com> > Signed-off-by: Bin Huang <bin.hu...@hxt-semitech.com> > Signed-off-by: Bin Huang <huangbin.ma...@gmail.com> > --- > lib/common/mbuf.h | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/lib/common/mbuf.h b/lib/common/mbuf.h > index 759f95d..93065f6 100644 > --- a/lib/common/mbuf.h > +++ b/lib/common/mbuf.h > @@ -18,6 +18,7 @@ pktmbuf_reset(struct rte_mbuf *m) > m->nb_segs = 1; > m->port = 0xff; > > + m->data_len = m->pkt_len; > m->data_off = (RTE_PKTMBUF_HEADROOM <= m->buf_len) ? > RTE_PKTMBUF_HEADROOM : m->buf_len; > } > -- > 2.7.4
Thank you for the patch, this maybe the problem a few others have seen. > Regards, Keith
