[Tsung] Re: Calculating tp 99 value

[Nicolas Niclausse]

sjagpal at cise.ufl.edu ecrivait le 19.10.2006 19:01:
> Re: Calculating tp 99 value (Nicolas Niclausse)
> 
> tp99 is minimum time under which 99% of the requests were completed. Eg:
> If I have a session with just one http GET request and I am making 1000
> get requests. I would typically record the time each request takes. If 99%
> of the calls returned in a time under 2 secs, my tp99 = 2 secs. This way,
> I eliminate the peaks that are infrequent.
> 
> The problem that I am facing here is that since tsung calculates mean resp
> time every 10 secs, I am unable to get accurate values for tp99. Even if
> one call in the 10 sec interval is taking a lot of time, the mean gets a
> high value too. As a result my tp99 value is not accurate.
> 
> Any ideas?

I see, you want to compute the 99th percentile. It's not possible in the
current release.

I can add an option to log raw data (reponse times) in a file; it may have
an impact on performance though

-- 
Nicolas