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<strong>Intel®</strong> Omni-Path High Level Feature Comparison Matrix<br />
Features <strong>Intel®</strong> OPA EDR Notes<br />
Link Speed 100Gb/s 100Gb/s Same Link Speed<br />
Switch Latency – Edge/DCS 100-110ns/300-330ns 90ns/~500ns<br />
MPI Latency (OSU pt2pt) Less Than 1µs ~1µs<br />
Link Enhancements<br />
– Error Detection/Correction<br />
Link Enhancements<br />
– Data Prioritization across VLs<br />
Link Enhancements<br />
– Graceful Degradation<br />
Packet Integrity Protection<br />
(PIP)<br />
Traffic Flow Optimization<br />
(TFO)<br />
Dynamic Lane Scaling<br />
(DLS)<br />
FEC/Link Level Retry<br />
RDMA Support Yes Yes<br />
No<br />
No<br />
<strong>Intel®</strong> OPA includes “Load-Free” error detection<br />
• Application Latency Most important<br />
Similar 1 Hop Latency<br />
• Intel’s OPA HFI improves with each CPU generation<br />
Intel OPA is a HW detection solution that adds no<br />
latency or BW penalty<br />
Built for MPI Semantics Yes – PSM (10% of code) No - Verbs Purpose designed for HPC<br />
Over and above VL prioritization. Allows High priority<br />
traffic to preempt in-flight low priority traffic (~15%<br />
performance improvement)<br />
Non-Disruptive Lane(s) failure. Supports asymmetrical<br />
traffic pattern. Avoids total shutdown,<br />
RDMA underpins verbs. <strong>Intel®</strong> OPA supports verbs. TID<br />
RDMA brings Send/Receive HW assists for RDMA for<br />
larger messages<br />
Switch Radix 48 Ports 36 Ports Higher Radix means less switches, power, space etc.<br />
Fabric Router No Future<br />
Intel Confidential – NDA<br />
Only<br />
Multi-Stage Fabric<br />
Latency Protection<br />
Limited need to connect to older fabric technologies<br />
except for storage – Still not available<br />
EDR Source: Publically Available Data<br />
Intel technologies’ features and benefits depend on system configuration and may require enabled hardware, software or<br />
OPA Features: Based on Design<br />
service activation. Performance varies depending on system configuration.<br />
Specifications<br />
Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States and other countries. *Other names and brands<br />
may be claimed as the property of others. All products, dates, and figures are preliminary and are subject to change without any notice. Copyright © 2015, Intel Corporation.<br />
Potential future options, subject to change without notice. All timeframes, features, products and dates are preliminary forecasts and subject to change without further notification.<br />
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