git: chgsbsize: Optimize for x86_64 by avoid uidinfo spinlock

[Sepherosa Ziehau]

commit 119a387fa23de9109d95157e0f22ff22fa19c7c2
Author: Sepherosa Ziehau <sephe at dragonflybsd.org>
Date:   Mon Mar 10 16:38:15 2014 +0800

    chgsbsize: Optimize for x86_64 by avoid uidinfo spinlock
    
    This kills one of the highly contended spinlocks on accept(2) path.  And
    it also greatly helps connect(2) path.
    
    With this commit, tools/kq_connect_client could do 273Kconns/s instead
    of 260Kconns/s (~5% improvement, however, connect(2) is still cpu bound).

Summary of changes:
 sys/kern/kern_resource.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/119a387fa23de9109d95157e0f22ff22fa19c7c2


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