The Gigabit Link Interface Board (GLIB) ecosystem

Vichoudis, P.; Andresen, J.; Baron, S.; Marı́n, M.; Bobillier, V.; Chramowitz, J; Haas, S.; Hansen, Maxwell T.; Joos, M.; Pardavila, Lorena Lobato; Petit, P.; Prosser, A.; Vasey, F.

doi:10.1088/1748-0221/8/03/c03012

Cited by 8 publications

(9 citation statements)

References 6 publications

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“…A GLIB based system [7] was used to test the 8CBC2 flexible prototype. A specific FMC mezzanine mounted on one of the GLIB board sockets provides a custom LVDS interface port on a VHDCI connector to communicate with the flex prototype.…”

Section: Test System and Test Resultsmentioning

confidence: 99%

Flexible front-end hybrids for the CMS outer tracker upgrade

et al. 2015

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The upgrade of the CMS tracker for the HL-LHC is based on a binary readout scheme using the CMS Binary Chip (CBC2). The connectivity requirements of this flip-chip ASIC requires the use of high density interconnecting hybrids. Module integration studies indicated that a foldable flexible hybrid circuit results in an optimal module arrangement. A full module size HDI flexible hybrid was designed, integrating eight CBC2 ASICs. The hybrid is fitted with carbon fiber stiffeners and a sharp folding allows connecting the two strip sensor wirebond arrays. The front end circuit development was focused on the 2 Strip (2S) module electronics. This paper will present the implementation of the 2S front end electronics on a flexible substrate covering the mechanical and electrical properties of the assembly.

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Section: Test System and Test Resultsmentioning

confidence: 99%

Flexible front-end hybrids for the CMS outer tracker upgrade

et al. 2015

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“…The upgraded back-end electronics are based on commercial high speed flash ADCs that digitize the signal at 1200 MS/s, with 8 bit resolution. These are quad channel devices mounted on a commercial mezzanine card (FMC125 [3]), hosted on a CERN developed motherboard (GLIB [4]) in µTCA double width form factor. A total of twelve boards, mounted in two crates, is necessary to readout BCM1F.…”

Section: Hardwarementioning

confidence: 99%

Upgraded back-end electronics for the CMS Fast Beam Conditions Monitor

Tosi

2019

Nuclear Instruments and Methods in Physics Research Section A:

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“…The test system consisted of network infrastructure, two computers, and one µTCA crate containing 12 µTCA boards (AMCs), each running the IPbus 2.0 firmware core. The computers were Dell PowerEdge R300 rack PCs; three of the AMCs were GLIBs [7] and the other nine were Mini-T5s [8].…”

Section: Jinst 10 C02019mentioning

confidence: 99%

“…In a more complex scenario such as a beam test or integration tests, there will typically be R300 rack PCs; three of the AMCs are GLIBs [6] and the other nine are Mini-T5s [7]. 165 …”

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confidence: 99%

IPbus: a flexible Ethernet-based control system for xTCA hardware

et al. 2015

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The ATCA and uTCA standards include industry-standard data pathway technologies such as Gigabit Ethernet which can be used for control communication, but no specific hardware control protocol is defined. The IPbus suite of software and firmware implements a reliable high-performance control link for particle physics electronics, and has successfully replaced VME control in several large projects. In this paper, we outline the IPbus system architecture, and describe recent developments in the reliability, scalability and performance of IPbus systems, carried out in preparation for deployment of uTCA-based CMS upgrades before the LHC 2015 run. We also discuss plans for future development of the IPbus suite.SUMMARY IPbus will be used for controlling the uTCA electronics in the CMS HCAL, TCDS, Pixel and Level-1 trigger upgrades. IPbus control has already been extensively used in the work of these upgrade projects so far, and final uTCA systems will be deployed in the experiment starting from Autumn 2014. IPbus is also being evaluated for use in the ATLAS and AL-ICE upgrades, as well as other particle physics experiments. A tightly-integrated suite of software and firmware components has been developed to implement the IPbus protocol the firmware core, a reference VHDL implementation of an IPbus server over UDP, decoding IPbus read/write requests within end-user hardware; uHAL, the C++/Python library providing an end-user API for IPbus reads and writes; and the ControlHub, a software application which abitrates hardware access to each board from multiple clients. Over the past two years we have developed a new reliable, higher-throughput version of the IPbus protocol, firmware and software. We have set up an IPbus test system with realistic network topology in the CMS electronics integration centre, in order to validate the reliability and performance of the IPbus control system. The software has been optimised to increase the block write/read throughput towards the Gigabit Ethernet bandwidth, and to improve the scalability with the number of targets handled by each ControlHub instance. For 1 client and 1 target, the latency is about 250us for sequences of up to tens of transactions and the maximum block read/write throughput is 0.54Gbit/s; the throughput increases to 0.8Gbit/s for 3 or more targets. We have accumulated weeks of continuous high-throughput random writes and reads over IPbus, without any errors. We also investigated scenarios with network congestion in the MCH Ethernet switch for a full uTCA crate, and found that with appropriate configuration this congestion only has a small effect on the IPbus throughput (12pct reduction). Plans for future work include improving the monitoring of IPbus dataflows in large systems of hundreds of targets, and investigating further ideas for usability and performance improvements. ABSTRACT: The ATCA and µTCA standards include industry-standard data pathway technologies such as Gigabit Ethernet which can be used for control communication, but no specific hardware ...

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The Gigabit Link Interface Board (GLIB) ecosystem

Cited by 8 publications

References 6 publications

Flexible front-end hybrids for the CMS outer tracker upgrade

Flexible front-end hybrids for the CMS outer tracker upgrade

Upgraded back-end electronics for the CMS Fast Beam Conditions Monitor

IPbus: a flexible Ethernet-based control system for xTCA hardware

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