Performance Tuning

Know Your CPU core layout
# cat /proc/cpuinfo
processor : 0
physical id : 0
core id : 0
processor : 2
physical id : 0
core id : 1
processor : 4
physical id : 0
core id : 2
processor : 6
physical id : 0
core id : 3
Socket 0
processor : 1
physical id : 1
core id : 0
processor : 3
physical id : 1
core id : 1
processor : 5
physical id : 1
core id : 2
processor : 7
physical id : 1
core id : 3
Socket1