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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=957074317-09062006>While we're talking about MTUs, is the IB MTU tunable
in uDAPL and/or Intel MPI via env var or config file?</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=957074317-09062006></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=957074317-09062006>Looks like Intel MPI 2.0.1 uses 2K for IB MTU like
MVAPICH does in OFED 1.0 rc4 and rc6, I'd like to try 1K with Intel
MPI.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=957074317-09062006></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=957074317-09062006>Scott</SPAN></FONT></DIV><BR>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> openib-general-bounces@openib.org
[mailto:openib-general-bounces@openib.org] <B>On Behalf Of </B>Scott
Weitzenkamp (sweitzen)<BR><B>Sent:</B> Thursday, June 08, 2006 4:38
PM<BR><B>To:</B> Tziporet Koren; openfabrics-ewg@openib.org<BR><B>Cc:</B>
openib-general<BR><B>Subject:</B> RE: [openib-general] OFED-1.0-rc6 is
available<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=607423123-08062006>The MTU change undos the changes for bug 81, so I
have reopened bug 81 (<A
href="http://openib.org/bugzilla/show_bug.cgi?id=81">http://openib.org/bugzilla/show_bug.cgi?id=81</A>).</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=607423123-08062006></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=607423123-08062006>With rc6, PCI-X osu_bw and osu_bibw performance is
bad, and PCI-E osu_bibw performance is bad. I've enclosed some
performance data, look at rc4 vs rc5 vs rc6 for
Cougar/Cheetah/LionMini.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=607423123-08062006></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=607423123-08062006>Are there other benchmarks driving the changes in rc6
(and rc4)?</SPAN></FONT></DIV>
<DIV> </DIV>
<DIV align=left><FONT face=Arial color=#0000ff size=2>Scott
Weitzenkamp</FONT></DIV>
<DIV align=left><FONT face=Arial color=#0000ff size=2>SQA and Release
Manager</FONT></DIV>
<DIV align=left><FONT face=Arial color=#0000ff size=2>Server Virtualization
Business Unit</FONT></DIV>
<DIV align=left><FONT face=Arial color=#0000ff size=2>Cisco
Systems</FONT></DIV>
<DIV> </DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial color=#000000 size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P class=MsoNormal><B><FONT face=Arial size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Arial">OSU
MPI:</SPAN></FONT></B></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.25in; TEXT-INDENT: -0.25in"><FONT
face=Symbol size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Symbol">·<FONT
face="Times New Roman" size=1><SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></FONT></SPAN></FONT><SPAN dir=ltr><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Added mpi_alltoall fine tuning
parameters</SPAN></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.25in; TEXT-INDENT: -0.25in"><FONT
face=Symbol size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Symbol">·<FONT
face="Times New Roman" size=1><SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></FONT></SPAN></FONT><SPAN dir=ltr><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Added default
configuration/documentation file
$MPIHOME/etc/mvapich.conf</SPAN></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.25in; TEXT-INDENT: -0.25in"><FONT
face=Symbol size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Symbol">·<FONT
face="Times New Roman" size=1><SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></FONT></SPAN></FONT><SPAN dir=ltr><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Added shell configuration
files $MPIHOME/etc/mvapich.csh ,
$MPIHOME/etc/mvapich.csh</SPAN></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.25in; TEXT-INDENT: -0.25in"><FONT
face=Symbol size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Symbol">·<FONT
face="Times New Roman" size=1><SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></FONT></SPAN></FONT><SPAN dir=ltr><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Default MTU was changed back to
2K for InfiniHost III Ex and InfiniHost III Lx HCAs. For InfiniHost card
recommended value
is:<BR>VIADEV_DEFAULT_MTU=MTU1024</SPAN></FONT></SPAN></P></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>