Performance probes

Phil Mayers p.mayers at
Tue Oct 15 14:44:16 CEST 2013

On 15/10/13 13:33, Alan Buxey wrote:
> With the time values for modules then exposed to the admin via radmin

That's not how systemtap/dtrace work; the process itself doesn't "see" 
the probe results, only the tracing app (and only when tracing is on).

Instrumenting in-process is rather harder IMO as the server has to keep 
track of the data, process it and changing the way it presents the data 
(e.g. EWMA versus histogram versus...) requires source-code changes.

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