Linux : Getting the cache details

Reading through manuals can be quite a pain and its simple if you know your system and the right commands.

I wanted to find out the L2 cache associativity and found some inconsistent details on different sites for the processor model i have.
A reliable source to find this is :
cat /sys/devices/system/cpu/cpu0/cache/index2/ways_of_associativity

dmidecode is also supposed to print it.But some time it reports some values as Unknown.

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