[lttng-dev] Prerequsites for adding perf context

[Mathieu Desnoyers]

* Oestman, Fredrik (Fredrik_Oestman at mentor.com) wrote:
> Hi,
> 
> 
> What exactly is needed on a system for
> 
> # lttng add-context -k -t perf:<something>
> 
> to work? Does perf have to be installed?
> 
> I have hw perfevents, but not perf, and get
> 
> hw perfevents: unable to reserve pmu

CONFIG_PERF_EVENTS. And what version of kernel do you use ?

> 
> 
> cheers,
> 
> Fredrik Östman
> 
> 
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-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com