# Presentation: 903482

## TM Report:8.40 and other activity 

**Tom Diehl – FNAL PPD**
**Elizabeth Gallas – FNAL CD**
**Terry Toole – U. Maryland**
***TriggerMeister Home Page***
**http://www-d0.fnal.gov/trigger_meister/private/www/**
*** ***

- Trigger Board Meeting
- October 12, 2002

- TM Report

- October 12, 2002

## TM activity in Last week:

_**TM activity in Last week:**_

**Five or 6 NEW trigger lists used  last online not previously used**
**L2_EM/1**
**QCD_Jets/2**
**global_CMT/8.4**
**muon_L1L2/1**
**rate_test_SMT/1**
**‘****Used’ trigger lists made 'permanent' in the production database**** **
**Helping with the DAQ rate task force tests, Making prescale changes with improving rate capability**
**Assisting with special runs**
**Progress on prescale generator **
**number of priority classes for triggers will need to expand (especially to group triggers with overlaps)**
**A generator is the only way to do this systematically****.**
**Pieces of it exist and are being used now**

- TM Report

- October 12, 2002

## Trigger Change Requests

_**Trigger Change Requests**_

**Currently: Email to TB**
**TriggerChangeReq link on TB page**
**Using language of the trigger database (spreadsheet language is shorthand and sometimes insufficient. do not refer to trigger numbers in the spreadsheet) **
**An example has been posted on the Trigger Change Req Form (based on the recent TAU trigger request)**
**Not the best system but we still MUST have time stamped, concise, succinct trigger change requests (including which triggers are proposed to change)**
**Future: some kind of repository**
**Only for Trigger Change Requests (not prescale, streaming ... discussion)**
**We need this because weeks or months of TB email is hard to sort through**
**Terry knows how to set up ‘elog’ **
**May not be ideal**
**Help is solicited to set up better system**

- TM Report

- October 12, 2002

## Global TL over last 7 days:

_**Global TL over last 7 days:**_

**Global_CMT-8.30 running: **
**50+% of events are larger than they should be **
**thought to be caused by events using the MarkAndPass filter with a low pass_1_of_n**
**Global_CMT-8.40 (last Friday): **
**created jointly by TMs and Terry Wyatt as emergency TL transition to address the event size issue**
**Change triggers with pass_1_of_n=1 to use L3FPrescale with prescale = 1.**
**Avg event size did not change noticeably**
**This afternoon, 8.40 modified**
**Added SRDirective (debuginfo=0)**
**No events will have L3 “debug” information**
**Event size down to 200kB (from ~355)**

- TM Report

- October 12, 2002

## Trying to exploit rate capability

_**Trying to exploit rate capability**_

- Thanks to Rate Task force, and detector and trigger experts – new rate capability
- This week:
- L1 Accept stable at 700 Hz (400)
- L2 Accept stable at 230 Hz (200)
- L3 Accept 50 Hz (40)
- Data Taking efficiency was 65% over last week
- Online issues effecting triggers/rates:
- L1 muon triggers dropping out
- CFT – still commissioning
- Downloads frequent
- Regions of detector dropping out
- SCL init rate not ideal
- Collector/Router
- L2 and L3 re-initialization
- System stability variable for last day or so
- Independent of rate or trigger list
- Accelerator delivering record luminosity
- Need more rejection at highest luminosity
- Unable to fill available L2 bandwidth @ low lum
**Bottleneck is now settling squarely on the trigger list itself (Rate to TAPE)**

- TM Report

- October 12, 2002

## Updated Rate plot from  Terry Toole

- 165757 - 2 hrs
- 30E30
- inL: 28.0
- Live: 70%
- scl/hr: 13

- 165764 - 4.1 hrs
- 20E30
- inL: 19.4
- Live: 69%
- scl/hr: 18.3

- 165765 - 4.4 hrs
- 14E30
- inL: 15.5
- Live: 69%
- scl/hr: 17

- 165770 - 3.1 hrs
- 10E30
- inL: 12.7
- Live: 83%
- scl/hr: 12.3

**Store 1832**

- Added rate to tape (red)
- We are studying run quality/efficiency

_**Updated Rate plot from  Terry Toole**_

- TM Report

- October 12, 2002