[openib-general] [Bug 95] New: Stack seems to reorder multicast entries

[bugzilla-daemon at openib.org]

http://openib.org/bugzilla/show_bug.cgi?id=95

           Summary: Stack seems to reorder multicast entries
           Product: OpenFabrics Linux
           Version: 1.0rc3
          Platform: All
        OS/Version: Other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: IPoIB
        AssignedTo: bugzilla at openib.org
        ReportedBy: jim at pantasys.com


When running iperf to test multicast performance, we seen many out-of-order 
errors when the receive node is running OFED RC3 or RC4.

Case 1:  IBGD (or gen2) sending to gen2 receive node
  Receive node: 
    - iperf -s -u -B 224.0.6.66 -i 2

  Send node:
    - Add multicast route to interface
    - iperf -c 224.0.6.66 -u -T 3 -t 400 -i 2 -b 100M -l 100

The receive node should report no lost or out of order frames.

Case 2: same sender, using OFED RC3 or RC4 receive node
  Run the same test as above.  You will see many multicast frames report out 
of order.

We have reproduced this problem in two different sites.  In all cases we are 
using SUSE10 as the OS hosting the receive stack (gen2 or OFED).



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