sched: refactor NOLOCK qdiscs
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- v1 Latest2 patches 5 repliesIn review
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/2 | sched: replace __QDISC_STATE_RUNNING bit with a spin lockinclude/ net/ | +16 | 0 replies | |
| 2/2 | pfifo_fast: drop unneeded additional lock on dequeueinclude/ net/ | +7 | 4 replies |
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Cover letter [PATCH net-next 0/2] sched: refactor NOLOCK qdiscs
With the introduction of NOLOCK qdiscs, pfifo_fast performances in the uncontended scenario degraded measurably, especially after the commit eb82a9944792 ("net: sched, fix OOO packets with pfifo_fast").
This series restore the pfifo_fast performances in such scenario back the previous level, mainly reducing the number of atomic operations required to perform the qdisc_run() call. Even performances in the contended scenario increase measurably.
Note: This series is on top of:
sched: manipulate __QDISC_STATE_RUNNING in qdisc_run_* helpers
Paolo Abeni (2):
sched: replace __QDISC_STATE_RUNNING bit with a spin lock
pfifo_fast: drop unneeded additional lock on dequeue
include/linux/skb_array.h | 5 +++++ include/net/sch_generic.h | 10 +++++----- net/sched/sch_generic.c | 15 +++++++++++++-- 3 files changed, 23 insertions(+), 7 deletions(-)
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2.14.3