EJFAT EPSCI Meeting Jun. 29, 2022

The meeting time is 2:00pm.

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	https://jlab-org.zoomgov.com/j/1617413961?pwd=QWpXalc0SXFrSUNBNmFrbVZycisrUT09&from=addon

Meeting ID
161 741 3961

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124964

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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 (7) 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 (7) 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

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