Add CPU cache configuration info to pt-summary.

[akopytov]

[akopytov]

Is anybody looking at external pull requests for PT? Should I use another channel to submit this contribution? Thanks.

[percona-csalguero]

Could you add a comment saying that the code is your own creation and it can be distributed under the BSD licence?

Please check: https://github.com/percona/percona-toolkit/blob/2.2/CONTRIBUTE.md

[akopytov]

The code is my creation and can be distributed under the BSD license.

[percona-csalguero]

I am getting this:

          Designation               Configuration            Size        Associativity
  ========================= ============================== ======== ======================

What's the idea about this PR? What it should do? Could you provide an example?

[akopytov]

It uses data about the CPU cache provided by the dmidecode utility (https://linux.die.net/man/8/dmidecode). pt-summary already uses dmidecode (if avaliable) to provide information about available memory devices. The patch piggybacks on that functionality to describe CPU cache, e.g. available caches, their sizes and associativity.

[akopytov]

I think I tested it on an Intel Xeon machine and worked fine. As I understand, you got empty output. Can you give me the output of dmidecode -t cache on your machine?

[akopytov]

Is there anything I can do to get this PR merged?

[percona-csalguero]

Sorry for the delay. I need to review the changes and if everything is OK, I am going to merge it. Thanks for your help

[it-percona]

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