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<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hi Ian and <span
style='mso-spacerun:yes'> </span>welcome to the IB scene …<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>There are several things you should
consider when you choose the stack to work with:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Life<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>-----<o:p></o:p></span></font></p>
<ul style='mso-margin-top-alt:0in' type=disc>
<li class=MsoNormal style='color:navy;mso-list:l5 level1 lfo1;tab-stops:list .5in'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:
Arial'>The IBGD is based on the VAPI driver (which won’t be
developed much in the future)<o:p></o:p></span></font></li>
<li class=MsoNormal style='color:navy;mso-list:l5 level1 lfo1;tab-stops:list .5in'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:
Arial'>The <span class=SpellE>openIB</span> is under development<o:p></o:p></span></font></li>
</ul>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Stability<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>-----------<o:p></o:p></span></font></p>
<ul style='mso-margin-top-alt:0in' type=disc>
<li class=MsoNormal style='color:navy;mso-list:l1 level1 lfo2;tab-stops:list .5in'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:
Arial'>Both of the drivers are stable<o:p></o:p></span></font></li>
</ul>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Support<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>------------<o:p></o:p></span></font></p>
<ul style='mso-margin-top-alt:0in' type=disc>
<li class=MsoNormal style='color:navy;mso-list:l1 level1 lfo2;tab-stops:list .5in'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:
Arial'>IBGD:<span style='mso-spacerun:yes'> </span>Mellanox support will
answer to your questions<o:p></o:p></span></font></li>
<li class=MsoNormal style='color:navy;mso-list:l1 level1 lfo2;tab-stops:list .5in'><span
class=SpellE><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial'>openIB</span></font></span><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>: all the <span
class=SpellE>opebIB</span> members can help you and answer to your
questions<o:p></o:p></span></font></li>
</ul>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Debug features<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>---------------------<o:p></o:p></span></font></p>
<ul style='mso-margin-top-alt:0in' type=disc>
<li class=MsoNormal style='color:navy;mso-list:l2 level1 lfo3;tab-stops:list .5in'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:
Arial'>the IBGD is more programmer friendly environment (the return value
help you understand exactly what the error was)<o:p></o:p></span></font></li>
<li class=MsoNormal style='color:navy;mso-list:l2 level1 lfo3;tab-stops:list .5in'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:
Arial'>not friendly at all: the return value in case of error will be -1
(most of the times) without any debug print or specific return value to
different errors<o:p></o:p></span></font></li>
</ul>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Supported HW<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>--------------------<o:p></o:p></span></font></p>
<ul style='mso-margin-top-alt:0in' type=disc>
<li class=MsoNormal style='color:navy;mso-list:l0 level1 lfo4;tab-stops:list .5in'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:
Arial'>IBGD: Mellanox <span class=SpellE>HCAs</span> are being supported<o:p></o:p></span></font></li>
<li class=MsoNormal style='color:navy;mso-list:l0 level1 lfo4;tab-stops:list .5in'><span
class=SpellE><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial'>openIB</span></font></span><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> : Mellanox /
IBM / <span class=SpellE>PathScale</span> <span class=SpellE>HCAs</span>
are being supported<o:p></o:p></span></font></li>
</ul>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Supported Linux kernels versions<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>------------------------------------------------<o:p></o:p></span></font></p>
<ul style='mso-margin-top-alt:0in' type=disc>
<li class=MsoNormal style='color:navy;mso-list:l4 level1 lfo5;tab-stops:list .5in'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:
Arial'>IBGD support kernel 2.4.*, 2.6* (up to 2.6.11)<o:p></o:p></span></font></li>
<li class=MsoNormal style='color:navy;mso-list:l4 level1 lfo5;tab-stops:list .5in'><span
class=SpellE><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial'>openIB</span></font></span><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> support the
latest kernel.org <o:p></o:p></span></font></li>
</ul>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Latency<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>-----------<o:p></o:p></span></font></p>
<ul style='mso-margin-top-alt:0in' type=disc>
<li class=MsoNormal style='color:navy;mso-list:l3 level1 lfo6;tab-stops:list .5in'><span
class=SpellE><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial'>openIB</span></font></span><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> based applications
can may better latency than IBGD based <span class=SpellE>applicaitons</span><o:p></o:p></span></font></li>
</ul>
<p class=MsoNormal style='margin-left:.25in'><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Few weeks ago, Mellanox published IBG2
(which is a stable version of the <span class=SpellE>openIB</span> driver)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><span class=SpellE><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>Dotan</span></font></span><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><span style='mso-spacerun:yes'> </span><o:p></o:p></span></font></p>
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