Re: A KernelShark plugin for Xen traces analysis ​

["Yordan Karadzhov (VMware)" <y.karadz@gmail.com>]

Hi Giuseppe,

It is great to see such progress in the development of the Xen plugin.

Can you share with us what are your plans for continuing this work. Is 
this a first prototype of the plugin, or it is an almost final version?

I was also thinking that maybe you can prepare a short tutorial on 
writing KernelShark plugins for data inputs. You have the best 
experience for this task, since you are the first to develop an external 
plugin. Ideally, this can even turn into a talk that you can give at 
some open source event.
What do you think?

Best,
Yordan


On 13.04.21 г. 17:28, Giuseppe Eletto wrote:
> 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.
>