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94522
2014 Mar 03
5
[PATCH v5 3/8] qspinlock, x86: Add x86 specific optimization for 2 contending tasks
Hi,
Here are some numbers for my version -- also attached is the test code.
I found that booting big machines is tediously slow so I lifted the
whole lot to userspace.
I measure the cycles spend in arch_spin_lock() + arch_spin_unlock().
The machines used are a 4 node (2 socket) AMD Interlagos, and a 2 node
(2 socket) Intel Westmere-EP.
AMD (ticket) AMD (qspinlock + pending + opt)
Local: