• Fenghua Yu's avatar
    [IA64] fsys_getcpu for IA64 · 3bc207d2
    Fenghua Yu authored
    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: default avatarFenghua Yu <fenghua.yu@intel.com>
    Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
    3bc207d2
fsys.S 28.8 KB