Changes between Version 5 and Version 6 of LimulusBenchmarks


Ignore:
Timestamp:
02/27/13 16:00:19 (12 years ago)
Author:
admin
Comment:

updated 10GigE

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  • LimulusBenchmarks

    v5 v6  
    3232=== Switchless 10 GigE === 
    3333 
    34 These tests are very preliminary using old hardware and untuned software. 
     34'''These tests are very preliminary using old hardware and untuned software.''' 
    3535 
    36 The first issue is how to add 10GigE without a switch. Create a four node loop using [http://www.linuxfoundation.org/collaborate/workgroups/networking/bridge#Bridge_priority Ethernet Bridge]. A simple loop will require a Spanning Tree Protocol, but that cuts a link. So replace the cut link with secondary network. Then 4 of 6 routes are 0 hop and 2 of 6 are 1 hop.  
     36The first issue is how to add 10GigE without a switch using low cost dual port GigE cards. Create a four node loop using [http://www.linuxfoundation.org/collaborate/workgroups/networking/bridge#Bridge_priority Ethernet Bridge]. A simple loop will require a Spanning Tree Protocol, but that cuts a link and introduces one 2-hop route, two 1-hop routes, and three 0-hop routes. If one of the bridges is replaced by a [http://www.linuxfoundation.org/collaborate/workgroups/networking/bonding bonded link] in "mode 0" (round robin) then there are effectively four 1-hop routes and two 0-hop routes, but not route takes more than 1-hop. 
    3737 
    38 Hardware: Head node is Sandy Bridge, i5-2400S with 4 GB RAM, The nodes are single dual core E6550, with 4 GB RAM. 10Gig NICS are [http://www.chelsio.com/adapters/t4_unified_wire_adapters/ Chelsio T420-SO-CR]  
     38{{{ 
    3939 
    40 Software: [http://open-mx.gforge.inria.fr/ open-mx]  
     40LAN -- head node----------- n2 
     41         bridge           bridge 
     42          |                  | 
     43          |                  | 
     44          |                  | 
     45         n0 ---------------- n1 
     46       bridge               bonded 
     47                       mode 0 Round Robin 
     48}}} 
     49 
     50'''Hardware:''' Head node is Sandy Bridge, i5-2400S with 4 GB RAM, The nodes are single dual core E6550, with 4 GB RAM. 10Gig NICS are [http://www.chelsio.com/adapters/t4_unified_wire_adapters/ Chelsio T420-SO-CR]  
     51 
     52'''Software:''' [http://open-mx.gforge.inria.fr/ open-mx]  
    4153 
    4254 
    43 The following are the best case "0 hop" for omx_perf (note: MTU is 1500 and no other tweaking. 
     55The following are the best case "0-hop" for omx_perf (note: MTU is 1500 and no other tweaking. 
    4456 
    4557{{{ 
    … …  
    7082}}} 
    7183 
    72 The worst case numbers (1 hop) are below: 
     84The worst case numbers for omx_perf (1-hop) are below: 
    7385 
    7486{{{