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1. dia
Hungarian ALICE Summer Students
2012
Dénes Ervin
MTA Wigner FK, RMKI NFO
3 Hungarian Students
• Kiss Gábor – official summer student
– Alice DAQ, supervisor Filippo Costa
• Melegh Hunor – intern summer student
– Alice DAQ, supervisor Sylvain Chapeland
• Blutmann Kristóf – intern summer student
– GBT project, supervisor Soós Csaba
Some Notations
• Connected to Gábor’s work
– DDL – Detector Data Link
• CERN - Wigner development, all ALICE sub-detectors uses, ~ 500 link in ALICE
– RORC – ReadOut Receiver Card
• Transfers DDL data to DAQ computers
– Physmem – Physical Memory
• Memory outside Linux, RORC puts data here, kernel and user reach it w/o data move
– DIM - Distributed Information Management
• Connected to Hunor’s work
– Orthos – Alarm System for Alice DAQ
• Monitors ~ 450 PCs of DAQ: status, temperature, disk fullness, etc
• Connected to Kristóf’s work
– GBT - GigaBit Transceiver
• CERN project for hard rad tolerant optical link + error recovering protocol for LHC
experiments
Hunor G. Melegh
• Period:
• Tasks:
•
Sensors
SNMP
Agent
interface
SW
IPMI
HW
Ethernet
connection
Ethernet
connection
IPMI
interface
SW
SNMP
interface
SW
Metric
Metric
Orthos
Observer machine
Host machine
CERN Summer Intern
ALCIE DAQ Group
28th June – 29th August, 2012
Design and realization of metric engines for the Orthos Alarm
System developed by the ALICE DAQ Group. The software
components must be able to monitor internal parameters of the
production machines and inject alarms in case of abnormal
behaviour. (i.e. „Alarm! Disk space is low: \dev…”).
Utilized techniques:
IPMI (Intelligent Peripheral Management Interface)
SNMP (Simple Network Management Protocol)
Standards and achievements
• IPMI:
– It based on an single board computer, which collects all the sensor
information provided by the host machines. Measurements and
summaries are available through Ethernet connection either the SBC is
integrated or just connected to the motherboard.
• SNMP:
– Well-known standard, which offers a simple platform to poll information
from wide range of type of devices, including routers, modems, diskarrays, etc. Simple personal computers are also observable via an SNMP
agent application.
• Achievements:
– Two stand-alone applications, which are able to query interesting
information and generate metrics for the Orthos framework.
– The documentation and the detailed presentation are also available:
http://www.kfki.hu/~hmelegh/IpmiSnmp
15 dB
14.5 dB
14 dB
13.5 dB
13 dB
12.5 dB
12 dB
11.5 dB
11 dB
10.5 dB
10 dB
9.5 dB
9 dB
8.5 dB
8 dB
7.5 dB
7 dB
6.5 dB
6 dB
5.5 dB
5 dB
4.5 dB
4 dB
1.00E+00
1.00E-01
1.00E-02
1.00E-03
1.00E-04
1.00E-05
1.00E-06
1.00E-07
1.00E-08
1.00E-09
1.00E-10
1.00E-11
1.00E-12
BER, Commercial MM transceiver
BER, AVAGO transceiver
1.00E+00
18 dB 17.5 dB 17 dB 16.5 dB 16 dB 15.5 dB 15 dB 14.5 dB 14 dB 13.5 dB
1.00E-02
1.00E-04
1.00E-06
1.00E-08
1.00E-10
1.00E-12
BER, IBERT core
BER, Own core
Bit error rate
Channel
ENCODED
attenuation
17.5 dB
1.50E-06
17 dB
6.00E-08
16.5 dB
7.40E-10
15.6 dB
1.00E-12
14 dB
RAW
5.50E-04
1.20E-04
1.08E-05
1E-12

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