Re: [PATCH 0/11] LTTng-core (basic tracing infrastructure) 0.5.108

Mathieu Desnoyers
2006-09-18T15:06:25Z

* Jes Sorensen (jes@sgi.com) wrote:
> Mathieu Desnoyers wrote:
> > The bottom line is :
> >
> > LTTng impact on the studied phenomenon : 35% slower
> >
> > LTTng+kprobes impact on the studied phenomenon : 73% slower
> >
> > Therefore, I conclude that on this type of high event rate workload, kprobes
> > doubles the tracer impact on the system.
>
> For this specific benchmark, for which we have not seen the code, nor
> do we know what system configuration it was run on. Sorry, but even M$'s
> sham benchmarks generally tell you which system they used for their
> tests.
>
> In addition, some profiling would be interesting so we can see exactly
> where things go wrong and fix it. Ingo seems to be doing a good job at
> that even without you providing this basic info....
>

Hi Jes,

I did not repeat my system configuration from the previous email in the thread
as it seemed redundant. Ingo asked me politely to tell more about my config
and tests, which I have done. Please read on further down this thread to get
that information.

Mathieu

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