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| author | Fenghua Yu <fenghua.yu@intel.com> | 2007-02-12 16:27:10 -0800 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2007-03-07 16:27:09 -0800 |
| commit | 3bc207d2b72ea0e6927cccc653c2dc8be593f89f (patch) | |
| tree | 6227ca004edf20809668ce0899e1835e075842bc /arch/ia64/kernel/smp.c | |
| parent | ddbad076303dfc0ed4fcba53907dc175bb6d67b2 (diff) | |
[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>
Diffstat (limited to 'arch/ia64/kernel/smp.c')
0 files changed, 0 insertions, 0 deletions