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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>We get 40+ when using FDR cards and PCIe Gen3 and ib_write_bw<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Rupert<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> users-bounces@lists.openfabrics.org [mailto:users-bounces@lists.openfabrics.org] <b>On Behalf Of </b>Coulter, Susan K<br><b>Sent:</b> Monday, January 11, 2016 5:11 PM<br><b>To:</b> German Anders<br><b>Cc:</b> users@lists.openfabrics.org<br><b>Subject:</b> Re: [Users] Performance issue with FDR & Ubuntu<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal>On Dec 22, 2015, at 11:55 AM, German Anders <<a href="mailto:ganders@despegar.com">ganders@despegar.com</a>> wrote:<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span style='font-family:"Courier New";color:#0B5394'>Is there anyone around that is using IB FDR and running an iperf between two hosts on the same net, are getting more than 24Gbits/sec?</span><o:p></o:p></p></div></blockquote><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I just ran some quick iperf tests between 2 FDR HCAs - I get the same ~24Gbs.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>The constraint is often the PCI bus, not IPoIB itself.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><div><div><p class=MsoNormal><span style='color:black'>==================================================<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'>Susan Coulter<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'>HPC Network Technical Lead<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'>(505) 667-8425<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'>“Once in a while you get shown the light<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'> In the strangest of places if you look at it right” <i>Robert Hunter</i><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'>==================================================<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p></div></div><p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div></body></html>