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author | Thomas Graf <tgraf@suug.ch> | 2005-07-18 13:30:53 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2005-07-18 13:30:53 -0700 |
commit | 452f299da3253f65020143f743c2e207b752547b (patch) | |
tree | 56f02114d9e65d60c0f3a0658602e7e193f226bd /include/linux | |
parent | d7c7ed4dbc66c5f4dfa5615cdfc5009af3b3b137 (diff) | |
download | op-kernel-dev-452f299da3253f65020143f743c2e207b752547b.zip op-kernel-dev-452f299da3253f65020143f743c2e207b752547b.tar.gz |
[PKT_SCHED]: Reduce branch mispredictions in pfifo_fast_dequeue
The current call to __qdisc_dequeue_head leads to a branch
misprediction for every loop iteration, the fact that the
most common priority is 2 makes this even worse. This issue
has been brought up by Eric Dumazet <dada1@cosmosbay.com>
but unlike his solution which was to manually unroll the loop,
this approach preserves the possibility to increase the number
of bands at compile time.
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux')
0 files changed, 0 insertions, 0 deletions