[LLVMdev] LNT Database Access

Renato Golin renato.golin at linaro.org
Thu Feb 21 01:15:15 PST 2013


Hi,

I want to get access to the results at:

http://llvm.org/perf/db_default/v4/nts/machine/10

So I could do some analysis on it. Is there a way to dump the data or to
query it in any way?

Also, can I change the "base" system to point to a new build that I know is
better/more appropriate?

My problem is that LNT has some nice ways of identifying performance
regressions and errors (fall outside a specified range) but this is highly
dependant on the platform and it might change slowly with time (for the
better, I hope! ;)

What I want to do is to get a moving average, with standard deviation, and
report events like:

 - current result falls outside one standard deviation of recent average
 - current average is one standard deviation higher/lower than N runs ago
 - current standard deviation is X % higher than N runs ago
 - etc

Has anyone done that? Any pointers?

thanks,
--renato
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