git: kqueue: Add simple per-cpu cache for the knote

[Sepherosa Ziehau]

commit 1010d4c0d99645b70b06e518d009832ba33e267a
Author: Sepherosa Ziehau <sephe at dragonflybsd.org>
Date:   Sat Mar 5 00:06:43 2016 +0800

    kqueue: Add simple per-cpu cache for the knote
    
    This moves the malloc(M_WAITOK) out of the kqueue token for most of
    the time.  This significantly reduces the kqueue token contention when
    TCP connect rate is @395Kconns/s on connect side: contention rate
    dropped from ~150K/s to ~50K/s.

Summary of changes:
 sys/kern/kern_event.c | 36 +++++++++++++++++++++++++++++++++++-
 1 file changed, 35 insertions(+), 1 deletion(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/1010d4c0d99645b70b06e518d009832ba33e267a


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