On Fri, 2017-09-15 at 17:23 -0700, Rosen Penev wrote: > On a linksys E1200v1 (actually a crossflashed E1000v2), the offloading > features give no measurable benefit to speed or latency. Furthermore, > disabling GRO actually improves iperf performance by a whoppimg 3mbps. > Results: > > Currently:
> > v2: Changed napi_gro_receive to netif_receive_skb. Seems to have an identical > result. > > Signed-off-by: Rosen Penev <ros...@gmail.com> > --- > drivers/net/ethernet/broadcom/bgmac.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/net/ethernet/broadcom/bgmac.c > b/drivers/net/ethernet/broadcom/bgmac.c > index 48d672b204a4..1fb0053aeee7 100644 > --- a/drivers/net/ethernet/broadcom/bgmac.c > +++ b/drivers/net/ethernet/broadcom/bgmac.c > @@ -483,7 +483,7 @@ static int bgmac_dma_rx_read(struct bgmac *bgmac, struct > bgmac_dma_ring *ring, > skb->protocol = eth_type_trans(skb, bgmac->net_dev); > bgmac->net_dev->stats.rx_bytes += len; > bgmac->net_dev->stats.rx_packets++; > - napi_gro_receive(&bgmac->napi, skb); > + netif_receive_skb(skb); > handled++; > } while (0); > And have you tested 1Gbit link speed ? ( Or 2.5 Gbit link speed ) If you want to disable GRO on your host, fine : you can use ethtool -K
