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

Frank Ch. Eigler
2010-03-23T14:46:00Z

Soeren Sandmann <sandmann@daimi.au.dk> 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