K 10
svn:author
V 9
jimharris
K 8
svn:date
V 27
2012-10-24T18:36:41.023363Z
K 7
svn:log
V 391
Pad tdq_lock to avoid false sharing with tdq_load and tdq_cpu_idle.

This enables CPU searches (which read tdq_load) to operate independently
of any contention on the spinlock.  Some scheduler-intensive workloads
running on an 8C single-socket SNB Xeon show considerable improvement with
this change (2-3% perf improvement, 5-6% decrease in CPU util).

Sponsored by:	Intel
Reviewed by:	jeff

END