l2 status and plan matt worcester, heather ray, monica tecchio, myron campbell, jane nachtman, david...
TRANSCRIPT
CDF
L2 Status and Plan
Matt Worcester, Heather Ray, Monica Tecchio,
Myron Campbell, Jane Nachtman, David Saltzberg, Tom Wright, Steve Kuhlmann, Karen Byrum, Masa Tanaka, Fred Neill, Peter Wittich, Nathan Goldschmidt, Ted Liu, Alexei
Varganov, John Dawson, Bill Haberichter, Greg Feild, Stephen Miller
December 7, 2001
L2 Review
12/7/01 2
CDF L2 Status
L2 WORKS!
12/7/01 3
CDF L2 Status
• Current L2 Crate Configuration– 1 Alpha
– L1
– Clist
– Isolist
– Tracklist
– Svtlist
– Reces(x4)
Magic Bus
Alpha Processorx4
SVT Track Muon XCESClusterList
L1Trig
IsolationCluster
TSI117 bits/
track21 bits/track
512 bits summary flag10,560 bits/
event
1536 bits/event
46 bits/cluster
96 bits/event
145 bits/cluster
12/7/01 4
CDF L2 Status
• Current L2 Operations– 1 Alpha, L1, Clist, SVTlist, Tracklist, Isolist, Reces(w/o readout)
– Currently used for data taking with L2 cutting on jets
– Tested at 20KHz with cosmics test
– All the interface boards work without sync and data errors.
CDF
L2 Goals and Plans
Stephen Miller
September 7, 2001
L2 Workshop
Slide From L2 Workshop 9/7/01
12/7/01 6
CDF Goals Before Shutdown
• L2 Testing Milestones– Run cutting on Jets at L2
• Using Clist and L1 board run at 2-20Khz for 10M L1A• Problems to fix: Clist sync error. L1 bits error
– Run cutting on SVT track information• Using SVTlist and L1 board run at 2-20Khz for 10M L1A • Problems to fix: L1 bits error. SVTlist dstrobe error• Other work: Correct d0. Write code for simple trigger.
– Run cutting on Electrons• Using Clist, Tracklist, L1• Problems to fix: L1 bits error. Clist sync error. Clist-Tracklist collisions.• Other work: Finish electron code.
Slide From L2 Workshop 9/7/01
DONE
DONE
ALMOST DONE
12/7/01 7
CDF Goals Before Shutdown
• L2 Testing Milestones cont..– Run with L1, Clist, SVTlist, Tracklist with high rate L1A
• Main goal is to check data integrity.
– Test of Reces data• Low rate test with beam• Useful for understanding SMXR trigger data• Ideally: Would have Alpha-VME errors fixed for high rate test
– Test with Clist and Isolist • Need test with beam to compare Isolist and Clist data
– Test with all interface boards• Only consider this if all other problems have been fixed• Would first do the test with Cosmics.
Slide From L2 Workshop 9/7/01
DONE
DONE
DONE (after shutdown)
DONE (after shutdown)
12/7/01 8
CDF Goals Before Shutdown
• L2 Trigger/Physics Milestones– Cutting on Jets
• Just Clist and L1 boards in system• Point is to improve data quality at higher Luminosity
– Cutting on SVT track information• Without Clist? And no cutting on Jets? • Is there a target sample size useful for Physics groups?
– Cutting on Jets, Electrons and SVT tracks• Ideal goal before shutdown
– Work to do• Establish stable L2 operations• Have error handling code in L2 to quickly find errors
Slide From L2 Workshop 9/7/01
DONE
SVX errors Required tagging mode
DONE
12/7/01 9
CDF Plans during shutdown
• Magic Bus – Install new Magic Bus – Change termination– Study Magic Bus collisions with cosmics
• Need to remove firmware workarounds to create collisions
• Alpha Tests – Add additional processors –
• First test with subset of interface boards
– Move to full crate test using cosmics
• Other– Finish debugging known problems
Slide From L2 Workshop 9/7/01
DONE
Work in Progress
DONE
DONE
DONEMajor Improvements in Clustering Crates
12/7/01 10
CDF L2 Status
• Fixed Problems– Enormous improvement for all boards since the L2 Review in Sept.– List of solved problems too long to cover– Only known problems are listed below
• Unresolved issues– Errors from Clustering Crate
• Appearance of single bit energy errors – fixed with jumpers on backplane• Isolation boards have 1% eta errors from Clustering Crates
– Error reproduced in teststand – caused by Clique board– (Worst Case) Can find error in Alpha code by comparing to Clist
» Gives 1% over efficiency for isolation triggers
– Major crate issue is Magic Bus arbitration (work in progress)• Important for achieving design rate, not for operation at 20KHz
– Need to get reliable Reces readout• Really a problem with Alpha fpga firmware
– Muon board is only missing interface board
12/7/01 11
CDF Software Status
Current Software Status– Alpha executable used for making L2 decision
• Has been running and sending L2A since beam started
• Jet cutting algorithm is used for data taking. L2 autoaccepts used for other triggers
• SVT based trigger tested. Electron and SVT triggers are written, but need testing
• Monitoring software will create error condition if interface boards fail to send data or get out of sync
– Alpha code organization• Alpha software stored in online CVS repository
• Executable is generated automatically using cuts from the TriggerDB
12/7/01 12
CDF Software Status cont..
Current Software Status– People working on Alpha code
• Peter Wittich, Masa Tanaka, Heather Ray, Stephen Miller, Tom Wright
• Starting a L2 software meeting to focus on L2 code writing.
– Monitoring software • TrigMon software used online by shift crew. Offline for analyzing data
Has code for all interface boards
• L3 filter to check for data corruption in TL2D
• Uses simulation of trigger for exact comparison of TL2D contents with expected
• (Code will become basis for offline L2 trigger simulation)
12/7/01 13
CDF Short Term L2 Plan
• Maintain stable L2 operation with current configuration• Proposed L2 Crate Configuration for mid-January
– 3 or 4 Alphas, L1, Clist, SVTlist, Tracklist, Isolist, Reces(with readout) running at 20KHz L1A rate
• Rate well matched to expected luminosity
• 3 Alphas have been tested in crate in cosmic test at 20 KHz
– Need software work to ensure robust running with multiple alphas
– Need to process triggers in multiple alphas
• Reces readout problem can likely be fixed with Alpha firmware change
– Will be able to work on problem in teststand at Michigan
12/7/01 14
CDF Short Term L2 Plan cont..
• Software expectations for mid-January– Jet, SVT and Electron (with Isolation) triggers written and tested
with beam
– Reces based triggers ready by end of January
– Improved tools for code development and testing• Masa wrote tool for testing triggers with TL2D data
– Most of CDF4718 will be in place by end of January
– Will start optimization of triggers with high L1A rates
12/7/01 15
CDF L2 Software and CDF4718
Trigger L2 Option1 zerobias AutoAccept2 minbias AutoAccept3 singletower5 AutoAccept4 Jet20 Jet5 Jet50 Jet6 Jet70 Jet7 Jet100 Jet8 HighEtCentralEl CentralElectron9 Muon AutoAccept
10 BtoPiPi HadronicB11 Bs HadronicB12 Met+2Jets NJets 13 Met GlobalMissEt14 JPsiMuMu AutoAccept16 JPsiEE JPsiEE17 RadiativeB ElectronPlusSvt18 W/ZHiggs SvtTrack19 tt->jets ClusterSum20 Diffraction
20.1 AutoAccept20.2 Jet20.3 Jet20.4 AutoAccept20.5 AutoAccept
L2 options written are highlighted in Blue
Many still need to be tested
12/7/01 16
CDF L2 Software and CDF4718 cont..Trigger L2 Option
22 HighEtPhoton_Iso Photon23 UHEtPhoton Photon24 SHEtCluster Photon25 HEtDiPhoton_Iso Photon26 LoEtDiPhoton_Iso Photon27 Photon+2Jet Photon28 Three EmClust Photon29 MET + 2btags SvtTrack 30 MET+PEM Photon 31 .1 e+isol track ElectronPlusTrack31 .2 CMUP+isol track AutoAccept31 .3 CMX+isol track AutoAccept32 Dileptons
32.1 CEM+CEM CentralElectron 32.2 CEM+PEM ElectronPlusPhoton32.3 CMUP+CMUP AutoAccept32.4 CMUP+CMX AutoAccept32.5 CMX+CMX AutoAccept32.6 CEM+CMUP CentralElectron32.7 CEM+CMX CentralElectron32.8 PEM+CMUP Photon
33 Two XFT Tracks XFTTrack34 Photon+muon (charm) Photon35 Z->bb SvtTrack36 HighpT b-jet HighPtBjet37 .1 CMUP+disp. track SvtTrack37 .2 CEM+disp. track ElectronPlusSvt38 Di-tau DiTau39 MET+tau CentralElectron 41 HiEtPhoton_Iso Photon42 W (no track) Photon 43 e+track (no e iso) ElectronPlusTrack
12/7/01 17
CDF L2 Tests until mid-January
– Multiple Alpha tests
– Reces Readout tests
– Work on Low level errors in clustering system
– Tests of new trigger algorithms
– Test of new alpha firmware
– Tests of spare boards
– Tests with SVT-SVX (not L2 specific)
– High Rate tests with beam (change L1 prescales) – CDF test
• Tests initially done without beam, but may request beam time for final verification
12/7/01 18
CDF Path to Higher Rate
• Defining the Problem:– Current L2 crate runs at only 20KHz L1A rate
• This rate should be sufficient for Luminosities < 5x10^31• Rate limit due to delays for interface boards to send data on the backplane
– SVT board has 34us delay. (Isolation has 50us delay but doesn’t always send data)– Some delay due to overhead in code for controlling crate, interfacing with TS
– For higher luminosities, expectation is 50KHz L1A rate• Ideal is 10us for loading data, 10us for processing event with both happening at same time.
– Solution: Fix Magic Bus Arbitration, Improve Alpha firmware, Optimize Trigger Code, Run with 4 Alphas
• Magic Bus arbitration– Noise on arbitration lines causes interface boards to take the bus at same time
• Currently use time delays for each board to send data. Gives limit of 20KHz• Delays for boards chosen arbitrarily. Possibility of reducing delays.
– New MagicBus is being tested – at Michigan and lower crate• Will explore other arbitration options if needed
12/7/01 19
CDF Path to Higher Rate
• Improve Alpha firmware– All control currently done in software- gives 5-10us overhead per event– Some improvements possible with optimizing some code– New firmware written to handle control signals. Will give 1-2 us of overhead
• Partially tested at Fermilab. Need to verify TS handshake test.• New code to match firmware has been written. Needs debugging.
– Additional firmware changes could reduce overhead to < 1 us• Software would just check for data having been loaded and sending decision to TS.
• Trigger code optimization – Plan is to first write reliable code and then improve performance– Timing studies can be done in lower crate
• Assume all improvements will be studied/solved independent of beam– Tests done in teststands, lower crate, or upper crate with cosmics– Ideally test new code/configuration in last hour of a store.
• Only after extensive testing with cosmics. • Would use < 1% of luminosity for tests
12/7/01 20
CDF Plan for Muon Board
• Muon board being designed by Fred Neill at Michigan– Muon data fpga design done and mezzanine board built
– 9U board layout done
– MagicBus interface fpga under design (Tom Wright)
• Plans for testing – Firsts tests at Michigan with testclock, Muon trigger test card, Alpha for testing
board
– Cosmic ray tests at B0• Test at high rate standalone
• Test with full L2 crate
– No beam time will be requested for debugging problems
– Testing to be done by Fred, Eric, Tom, Stephen
12/7/01 21
CDF Plan for Operations
• Requirements for Reliable L2 operations– L2 monitoring –
• Check of TrigMon summary.
• Running validation code on all events from several runs a week (or validation as part of production).
• Keeping up “ L2 with Beam” web page – describes crate performance for each run.
– L2 pager coverage – • Response to errors found by shift crew. Instructing aces on any special L2 requirements.
Reporting status at 8am meeting.
• Currently handled full time by Heather Ray. Assembling list of names for additional personnel. Other people will be in place for start of physics data taking.
– Spares• At least 1 spare exists for each board. Require at least 2 spares per board. Need to finish
assembly and testing of some spares.
• Each institution must have an expert for repair of its boards
12/7/01 22
CDF Plan for Operations cont.
• Requirements for Reliable L2 operations cont…– Documentation
• Documentation being collected and organized on web pages• Schematics and some written documentation exists for all boards• General non-expert document has been written• Expert documentation/web page under development
• Proposal– Monitoring and pager coverage can be combined for L1 and L2 trigger
• Much of monitoring and validation code is already combined• Helps in distinguishing L1 and L2 problems• Adds additional manpower to both groups and extends expertise across systems
12/7/01 23
CDF Summary
L2 works!– Able to run at 20KHz with a full crate– Used for data taking with cutting on jets– Major improvement since September workshop
• Many errors have been fixed. (Most not mentioned in this talk)
• Short Term Plan– Maintain reliable L2 operation– Work on remaining issues needed to improve performance
• Multiple Alphas• Reading Reces• Higher Rates – Magic Bus Arbitration
– Writing and testing trigger algorithms for Physics• Team of people and tools are in place and being used.
• Longer Term Plan– L2 debugging and improvements will continue without using beam– Assemble group of people and knowledge base for maintaining L2 trigger