Re: [PATCH] Enhance perf to collect KVM guest os statistics from host side

[Frank Ch. Eigler]

Soeren Sandmann <sandmann@xxxxxxxxxxx> writes:

> [...]
>         - What is going on inside QEMU? 
>         - Which client is the X server servicing?
>         - What parts of a python/shell/scheme/javascript program is
>           taking the most CPU time?
> [...]

These kinds of questions usually require navigation through internal
data of the user-space process ("Where in this linked list is this
pointer?"), and often also correlating them with history ("which
socket/fd was most recently serviced?").

Systemtap excels at letting one express such things.

- FChE
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