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Understanding RDMA Microarchitecture Resources for Performance Isolation

on YouTube 14m
Talkat NSDI 2023 · 2023-04-17..04-19· [networking, distributed-systems]

speakers

name:Xinhao Kong
links:none on file
name:Jingrong Chen
links:none on file
name:Wei Bai
links:none on file
name:Yechen Xu
links:none on file
name:Mahmoud Elhaddad
links:none on file
name:Shachar Raindel
links:none on file
name:Jitendra Padhye
links:none on file
name:Alvin R. Lebeck
links:none on file
name:Danyang Zhuo
links:none on file

resources

video:https://youtu.be/ZznZVEv_ZKg
slides:none on file

summary

Presents a model tying RDMA verbs to RNIC internal resources using hardware counters, then builds the Husky test suite that creates verb pairs to target specific resources. Finds memory registration thrashes NIC cache so a zero-bandwidth attacker cuts a victim from ~100 Gbps to ~10 Gbps, and receive-not-ready exhausts RX pipeline so a simple attacker drops a 97 Gbps victim to near zero. Husky breaks existing HW and SW isolation (including SR-IOV and vendor QoS); vendors reproduce results and ship firmware fixes.

AI-written summary · about

chapters (9)

  1. 0:00Intro
  2. 1:13Existing Solutions for RDMA Performance Isolation
  3. 1:44Evaluating RDMA Performance Isolation
  4. 3:20RDMA Microarchitecture Resource Contention
  5. 5:22Goal - Systematic Test Suite
  6. 8:15Memory Registration Cause Severe Cache Contention
  7. 9:32Error Handling Exhaust RX Pipelines
  8. 10:36Husky: A Test Suite for RDMA Performance Isolation
  9. 11:05Example - Synthetic Victim

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