From: Fenghua Yu <fenghua.yu@intel.com>
Date: Tue, 13 Feb 2007 00:27:10 +0000 (-0800)
Subject: [IA64] fsys_getcpu for IA64
X-Git-Tag: v2.6.21-rc4~101^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3bc207d2b72ea0e6927cccc653c2dc8be593f89f;p=pandora-kernel.git

[IA64] fsys_getcpu for IA64

On 1.6GHz Montectio Tiger4, the following performance data is measured with
kernel built with defconfig which has NUMA configured:

Fastest sys_getcpu: 502 itc counts.
Fastest fsys_getcpu: 28 itc counts.

fsys_getcpu performance is largly impacted by whether data (node_to_cpu_map
etc) is in cache. It can take fsys_getcpu up to ~150 itc counts in cold
cache case.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
---

Reading git-diff-tree failed