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| author |   Alexei Starovoitov <ast@plumgrid.com> | 2014-09-30 17:53:21 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-10-01 22:08:12 -0400 |
| commit | 38b2cf2982dc73d3f07fe84fec8cc4ed9f64c1c5 (patch) | |
| tree | e1eeab1caf5d330a4bb9c8eeb4543af5c38c769b /Documentation/networking | |
| parent | net: bridge: add a br_set_state helper function (diff) | |
| download | linux-dev-38b2cf2982dc73d3f07fe84fec8cc4ed9f64c1c5.tar.xz linux-dev-38b2cf2982dc73d3f07fe84fec8cc4ed9f64c1c5.zip | |
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>
Diffstat (limited to 'Documentation/networking')
| -rw-r--r-- | Documentation/networking/pktgen.txt | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/networking/pktgen.txt b/Documentation/networking/pktgen.txt index 0dffc6e37902..6915c6b27869 100644 --- a/Documentation/networking/pktgen.txt +++ b/Documentation/networking/pktgen.txt @@ -99,6 +99,9 @@ Examples: pgset "clone_skb 1" sets the number of copies of the same packet pgset "clone_skb 0" use single SKB for all transmits + pgset "burst 8" uses xmit_more API to queue 8 copies of the same + packet and update HW tx queue tail pointer once. + "burst 1" is the default pgset "pkt_size 9014" sets packet size to 9014 pgset "frags 5" packet will consist of 5 fragments pgset "count 200000" sets number of packets to send, set to zero |