> -----Original Message----- > From: Liang, Cunming > Sent: Tuesday, August 04, 2015 12:47 PM > To: dev at dpdk.org > Cc: Ananyev, Konstantin; zoltan.kiss at linaro.org; Liang, Cunming > Subject: [PATCH v3] ixgbe: remove vector pmd burst size restriction > > 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 at intel.com> > --- > v3 change: > - reword the init print log > > v2 change: > - keep max rx burst size in 32 > - reword some comments > > drivers/net/ixgbe/ixgbe_rxtx.c | 4 +++- > drivers/net/ixgbe/ixgbe_rxtx.h | 5 ++--- > drivers/net/ixgbe/ixgbe_rxtx_vec.c | 39 > +++++++++++++++++++++----------------- > 3 files changed, 27 insertions(+), 21 deletions(-) >
Acked-by: Konstantin Ananyev <konstantin.ananyev at intel.com>
