EJFAT Group Meeting Jun. 23, 2022

The meeting time is 11:00am.

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Meeting URL
 https://jlab-org.zoomgov.com/j/1610125238?pwd=QnEvcjV6VFFndWZsQW15SmJKU0RJZz09&from=addon

Meeting ID
161 012 5238

Passcode
503371

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Agenda:

Previous meeting
Status:
- Using ESnet FPGA f/w build 28 April
  - Specs
  - Jumbo Frames
  - arp, ping, ICMP filtering
  - Port entropy
- Script based LB Control Plane
- In ESnet Legal Review
  - Support C libraries for LB Host Control Plane
  - ESnet smartnic open-source GitHub repo - in legal review
  - ESnet private, forkable Jlab P4 and simulations GitHub repo - in legal review
- ERSAP feed end bottleneck needs investigation; Timmer/Gyurjyan investigating
- New machines (6) rec'd, installed w/ Ubuntu 20.04 on EJFAT subnet (VLAN 937 172.19.22.0/24)
- Spare EJFAT equip loaners:
  - (4) DAQ dev machines indra-s[1-3] 129.57.29/109.23[0-2]
    - alkaid: 24 Xeon Gold 3.4 GHz cores, 100Gbs
    - indra-s1: 24 Xeon Gold 3.0 GHz cores, 100Gbs
    - indra-s2: 32 Xeon Gold 3.2 GHz cores, 100Gbs
    - indra-s3: 32 Xeon Gold 2.3 GHz cores, 100Gbs, 750GB ram disk
  - (4) DAQ Farm machines dafarm6[1-4] currently on 129.57.29.17[1-4] - each 32 Xeon 2.0Ghz cores - 1 Gbs NIC + (4) 10Gbs Spare NICs
  - (4) Unbuilt DAQ Farm machines - each 32 Xeon 2.0Ghz cores - 1 Gbs NIC + (4) 10Gbs Spare NICs
  - PR408549 (6) 100Gbs NICs - Shipped
  - PR408870 PR408938 (2) 100Gbs Arista switches, ~~transceivers, cables~~, etc - ETA ~~1 July~~ 5 October
Next Steps:
- EJFAT VLAN Checkout
- Network Performance:
  - FPGA LB Throughput - max sustained 90Gbs
  - Host NICs
  - Host S/W Reassembly - better algorithms, buffering, asynchronicity, etc.
  - EJFAT UDP Transmission Performance
  - Need better parameters for event reassembly/reconstruction
  - numa tools on ubuntu:
    - sudo apt install hwloc-nox
    - sudo apt install numactl
  - lstopo
  - numactl --hardware
  - To control the scheduling class, you can use the chrt command.
  - To pin to CPUs, use the taskset command. Or use the underlying syscalls.
  - kernel dameon threads
    - handle NIC driver interrupts
    - set scheduling class to SCHED_FIFO / SCHED_RR of reassembly process
  - want to set cpu socket of reassembly in common NUMA domain as NIC
  - DPDK will own NIC bypassing kernel, etc. - ESnet reports can stream 100 Gbps using DPDK; Pktgen-DPDK
  - Pktgen-DPDK
  - Look at ROCE / NIC
- ESnet UDP tuning
- Control Plane
  - Will interact with SLURM / Kubernetes
  - Python based (?)
  - Control Plane daemon for compute host (?)
  - Demonstrate CP based flexibility/elasticity
  - SLURM env for EJFAT VLAN (Hess)
- DAQ/VTP Data Generation Test Harness
- Vivado Licesnses for new machines - AI/ML ? D. Lawrence investigating
- Open Nic Shell
- ACAT 2022 - September/Italy - Abstract (July 14) / Paper
- RT2022 - August 01-05 Conference
- RT 2022 Paper
Back Burner / Downstream:
- FPGA LB data generation capability
- Hall-B FT calorimeter and hodoscope streaming readout test
  - May be able to use Abbott's indra-s1 setup
  - May be able to use new VTP f/w with Hall-B VTP's
  - CODA 3.10 + ERSAP for new VTP f/w
  - CODA 2.0 (non-streaming) for old VTP f/w
  - Diagram
  - Hall-B to start taking data June 8
  - Hall B VTPs on .167. subnet
- HOSS
  - parallelize writing of raw data files
  - distribute raw data across multiple compute nodes for calibration skims
  - 1 Gbs at hi-luminosity
  - Hall-D comms with DAQ 109 subnet require network customization; (EJFAT subnet)
  - Hall-D EJFAT use case
  - Hall-D EJFAT Network Diagram
- IPV6 testing
AOT

EJFAT Group Meeting Jun. 23, 2022

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