| TRandom() - seed [message #17341] |
Tue, 23 September 2014 16:35 |
Elisabetta Prencipe (2)
Messages: 214
Registered: February 2013
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first-grade participant |
From: *ikp.kfa-juelich.de
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Dear Stefano, dear all,
I am checking the performaces of the trunk rev-25813, and compare with the release scrut14.
In running the simulation, I found something which deserves a comment (I don't know how/if this could affect the results, probably it does not).
The issue is the following: when I run the macro/run/sim_complete.C, the output of my job is
[...]
<I> pbar-Momentum: 9.83
<I> Rnd Seed: -1
<I> Rnd Seed changed to 1902248331
EvtGen:Initializing EvtGen
[...]
**** 1 IDEVT= 1 Random Seeds = 1828892808 0
**** 2 IDEVT= 2 Random Seeds = 1828892808 0
**** 3 IDEVT= 3 Random Seeds = 1828892808 0
So, it looks that EvtGen random seed and the TRandom seed associated to the events are different in the same file.
I also saw quite often negative seeds or, in some cases, no seed assigned, but only a series of "**********", while starting with an integer number from EvtGen.
Did anybody experience the same?
Best regards, Elisabetta
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