From: Alexei Starovoitov <ast@plumgrid.com>
Date: Wed, 1 Oct 2014 00:53:21 +0000 (-0700)
Subject: net: pktgen: packet bursting via skb->xmit_more
X-Git-Tag: fixes-against-v3.18-rc2~144^2~64
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=38b2cf2982dc73d3f07fe84fec8cc4ed9f64c1c5;p=pandora-kernel.git

net: pktgen: packet bursting via skb->xmit_more

This patch demonstrates the effect of delaying update of HW tailptr.
(based on earlier patch by Jesper)

burst=1 is the default. It sends one packet with xmit_more=false
burst=2 sends one packet with xmit_more=true and
        2nd copy of the same packet with xmit_more=false
burst=3 sends two copies of the same packet with xmit_more=true and
        3rd copy with xmit_more=false

Performance with ixgbe (usec 30):
burst=1  tx:9.2 Mpps
burst=2  tx:13.5 Mpps
burst=3  tx:14.5 Mpps full 10G line rate

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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