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Paul Howard, Bruce Schulman , and Stephen Fried Microway, Inc. 12 Richards Road Plymouth, MA 02360 {paulhoward, bschulm

Paul Howard, Bruce Schulman , and Stephen Fried Microway, Inc. 12 Richards Road Plymouth, MA 02360 {paulhoward, bschulman ,steve}@microway.com. High Performance Embedded Computing Workshop. 23-25 September 2008. Approved for public release; distribution is unlimited.

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Paul Howard, Bruce Schulman , and Stephen Fried Microway, Inc. 12 Richards Road Plymouth, MA 02360 {paulhoward, bschulm

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  1. Paul Howard, Bruce Schulman, and Stephen Fried Microway, Inc. 12 Richards Road Plymouth, MA 02360 {paulhoward,bschulman,steve}@microway.com High Performance Embedded Computing Workshop 23-25 September 2008 Approved for public release; distribution is unlimited.

  2. Improvement of Linux InfiniBand Clusters • Measurement • MPI latency, bandwidth, and contention • InfiniBand performance and error registers • Any or all HCAs, any switch port, whole switch • Visualization • MPI Link-Checker 3D graphic for fabric capability • InfiniScope for application performance • Improvement • Verify fabric, find underperforming components • Compare new hardware • Find application data flow hot spots in fabric 1

  3. Low latency 2

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  5. Interconnect Technologies Compared Cable length (m) Bandwidth (MB/s) Latency (μs) Interconnect GigE 115 30 100 10GigE 860 9 100 InfiniBand DDR 1460 3.5 100* TriCom-X™ InfiniBand DDR 1910 1.2 100* * Emcore (Intel) cables. 4

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