EJFAT EPSCI Meeting Apr. 6, 2022

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The meeting time is 2:00pm.

Connection Info:

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Meeting URL
https://jlab-org.zoomgov.com/j/1612038101?pwd=Yk96QUcyT1NDVTRRUGNtOFVSSTdaUT09&from=addon

Meeting ID
161 203 8101

Passcode
378382

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Agenda:

  • Previous meeting
  • Situation:
    • Testing with End-to-end EJFAT ERSAP solution on FPGA LB
    • Jumbo Frames - indra-s2,s3, alkaid, fpga
    • Linux IP stack buffer size increased
    • Using script based LB Control Plane
    • Control Plane Gratuitous Arp cache updating (Scapy)
    • Benchmarking
    • Successfully Testing Calendar Epoch Advances
    • RT2022 - April 08 submission - August Conference
  • Pending:
    • Compute Equip.- ETA 1 June
    • Networking Equip. - ETA 1 July
    • Support C libraries for LB Host Control Plane
    • ESnet smartnic open-source GitHub repo (April)
    • ESnet private, forkable Jlab P4 and simulations GitHub repo (April)
    • Data_id <-> reassembly port mapping
  • To Do:
    • Near Term:
      • Hall-B FT calorimeter and hodoscope streaming readout test (scheduled within a week or two)
        • 2 crates for FT calorimeter, furnished with fADC250s. Total 332 channels.
        • 1 crate for the hodoscope that has 12 fADC (total 192 channels)
        • Update firmware on all 3 VTPs to send fADC aggregated data frames in the EVIO format, through UDP.
        • Design ERSAP FE application containing an actor that receives VTP frames through UDP, extracts information about the source/data ID and frame number (tick), and sends it to the EJFAT packetizing engine.
        • Stage 1 testing: single stream/data-ID
          • EJFAT LB + reassembly (RA) engine overall performance data-rate dependence.
          • EJFAT LB + RA engine performance dependence from the EJFAT packetizing engine MTU settings
        • Stage 2 testing: multi-stream/data_ID
          • Use EJFAT LB firmware that supports load balancing of multiple source/data_IDs.
          • EJFAT LB + RA engine performance as an event builder (i.e. source ID aggregator), a capability to send all available data_ID's with the same tick (time frame) to a single destination. NB Hall-B FT calorimeter and hodoscope setup is capable of sending up to 12 data streams.
      • C-based control plane
        • Feedback from Compute hosts design
        • Control Plane daemon for compute host
    • Downstream:
      • DPDK
      • P4 enhancements for ipv4/6 ping, arp
      • IPV6 testing
      • EJFAT Subnet
      • HOSS Hall-D EJFAT use case
        • parallelize writing of raw data files
        • distribute raw data across multiple compute nodes for calibration skims
  • AOT