Re: todays data (after L2 timeout setting change)

Date view Thread view Subject view Author view Attachment view

From: Frank Geurts (geurts_at_rice.edu)
Date: Wed Feb 26 2003 - 00:12:23 EST

FYI (startrig-hn, today) ... might well be related.

-------------------------------------------------
None L1 &/or L2 mishandling triggers

     Forum: STAR Trigger discussions
     Date: Feb 25, 17:26
     From: Jeff Landgraf <jml_at_bnl.gov>

Hello,

There is a problem in either L1 or L2 or both, which is that when parsing
the triggers[] array you are assuming that if you find an unused one
(triggers[i].used == 0) that the rest of them are also unused. This is not
true! The symptom is that for a run with such a configuration, no events
get sent to DAQ. I think the problem is in L2, but it could be L1 as well.
Please check your code...

-jeff
-------------------------------------------------

W.J. Llope wrote:
> star took ~600k events... frank did some tests and says
> the rate of apparent L2 timeouts is now hugely reduced w/ today's
> change from 0.1s to 0.5s....
>
> in localmon_to4056035.dat:
>
> Found 4215 beam events out of 14018 >>--> ratio = 0.300685
>
> -> localmon equivalent = 140k
> -> presently factor ~4 discrepancy between # local events
> and # star events
>
> hit patterns as epxected....
>
> _________________________________________________________
> W.J. Llope, Ph.D. Res. Assoc. Professor
> http://wjllope.rice.edu/default.html
> llope_at_physics.rice.edu
> T.W. Bonner Nuclear Lab.
> Rice University, MS-315
> 6100 S. Main phone: 713-348-4741
> Houston, TX 77005-1892 fax: 713-348-5215
>
>

Date view Thread view Subject view Author view Attachment view

This archive was generated by hypermail 2.1.4 : Thu Jul 24 2003 - 00:39:36 EDT