A KernelShark plugin for Xen traces analysis ​

[Giuseppe Eletto <giuseppe.eletto@xxxxxxxxxxxx>]

Hello,
I want to share with you a new plugin developed by me, under the
supervision of Dario Faggioli, which allows the new version of KernelShark
(the v2-beta) to open and view the Xen traces created using the "xentrace" tool.

In fact, KernelShark is a well known tool for graphical visualization
Linux kernel traces, obtained via "ftrace" and "trace-cmd". Anyway thanks
to its modular architecture, it is now possible to implement plugins which
open and display traces with arbitrary format, for example, as in in
this case, traces of the Xen hypervisor.

For more information on how to build the plugin and/or
to view the source code I leave the repository below:
https://github.com/giuseppe998e/kernelshark-xentrace-plugin


In short:

$ sudo apt install git build-essential libjson-c-dev
$ git clone --recurse-submodules
https://github.com/giuseppe998e/kernelshark-xentrace-plugin.git
$ cd kernelshark-xentrace-plugin/
$ make

$ export XEN_CPUHZ=3G # Sets the CPU frequency ((G)hz/(M)hz/(K)hz/hz)
$ kernelshark -p out/ks-xentrace.so trace.xen


You will need the development version of KernelShark, available here:
https://git.kernel.org/pub/scm/utils/trace-cmd/kernel-shark.git

A screenshot of the plugin in action is available here:
https://github.com/giuseppe998e/kernelshark-xentrace-plugin/raw/master/.github/img/ks-xentrace.png

I'm happy to receive whatever feedback you may have about it,
and to answer any question.

Kind regards,
Giuseppe Eletto.

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