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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2012-01-01 19:33:31 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-01-03 18:52:09 +0100 |
| commit | d47a0ac7b66883987275598d6039f902f4410ca9 (patch) | |
| tree | d70709d26a3833e2747126d221bbb2aa3f28ebd7 /net/sched/sch_qfq.c | |
| parent | mlx4_core: Elaborating limitation on VF port options (diff) | |
| download | linux-d47a0ac7b66883987275598d6039f902f4410ca9.tar.xz linux-d47a0ac7b66883987275598d6039f902f4410ca9.zip | |
sch_sfq: dont put new flow at the end of flows
SFQ enqueue algo puts a new flow _behind_ all pre-existing flows in the
circular list. In fact this is probably an old SFQ implementation bug.
100 Mbits = ~8333 full frames per second, or ~8 frames per ms.
With 50 flows, it means your "new flow" will have to wait 50 packets
being sent before its own packet. Thats the ~6ms.
We certainly can change SFQ to give a priority advantage to new flows,
so that next dequeued packet is taken from a new flow, not an old one.
Reported-by: Dave Taht <dave.taht@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_qfq.c')
0 files changed, 0 insertions, 0 deletions