Re: [dpdk-dev] [PATCH v3] ixgbe: remove vector pmd burst size restriction

[Thomas Monjalon <thomas.monjalon@6wind.com>]

> > On receive side, the burst size now floor aligns to RTE_IXGBE_DESCS_PER_LOOP power of 2.
> > According to this rule, the burst size less than 4 still won't receive anything.
> > (Before this change, the burst size less than 32 can't receive anything.)
> > _recv_*_pkts_vec returns no more than 32(RTE_IXGBE_RXQ_REARM_THRESH) packets.
> > 
> > On transmit side, the max burst size no longer bind with a constant, however it still
> > require to check the cross tx_rs_thresh violation.
> > 
> > There's no obvious performance drop found on both recv_pkts_vec
> > and recv_scattered_pkts_vec on burst size 32.
> > 
> > Signed-off-by: Cunming Liang <cunming.liang@intel.com>
> 
> Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>

Applied, thanks