Network performance of e1000 in 100MB mode.

Bill Stasior bill.stasior@av.com
Thu Feb 20 19:10:00 2003


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We have been experiencing poor network performance with the e1000 nic
that is built into the Precision 350n.  In particular, this nic does not
seem to perform well in 100BaseTx modes.  We've tried this both with the
nic set to auto mode and "100BaseTx FD" mode.  The best we get is around
3Mb/s - which is more than an order of magnitude worse than we get when
we try using an eePro 100 card (Intel EtherExpress Pro 100).
 
The kernel is the default redhat 8.0, kernel 2.4.18-14smp.  Any thoughts?
 
- Bill Stasior

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<p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 color=3Dblac=
k
face=3DArial><span style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font=
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Arial'>We have been experiencing poor network performance with the e1000 ni=
c<o:p></o:p></span></font></span></p>

<p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 color=3Dblac=
k
face=3DArial><span style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font=
-family:
Arial'>that is built into the Precision 350n.<span style=3D"mso-spacerun:
yes">&nbsp; </span>In particular, this nic does not<o:p></o:p></span></font=
></span></p>

<p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 color=3Dblac=
k
face=3DArial><span style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font=
-family:
Arial'>seem to perform well in 100BaseTx modes.<span style=3D"mso-spacerun:
yes">&nbsp; </span>We've tried this both with the<o:p></o:p></span></font><=
/span></p>

<p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 color=3Dblac=
k
face=3DArial><span style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font=
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Arial'>nic set to auto mode and &quot;100BaseTx FD&quot; mode.<span
style=3D"mso-spacerun: yes">&nbsp; </span>The best we get is around<o:p></o=
:p></span></font></span></p>

<p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 color=3Dblac=
k
face=3DArial><span style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font=
-family:
Arial'>3Mb/s - which is more than an order of magnitude worse than we get w=
hen<o:p></o:p></span></font></span></p>

<p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 color=3Dblac=
k
face=3DArial><span style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font=
-family:
Arial'>we try using an eePro 100 card (Intel EtherExpress Pro 100).<o:p></o=
:p></span></font></span></p>

<p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 color=3Dblac=
k
face=3DArial><span style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font=
-family:
Arial'><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></font><=
/span></p>

<p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 color=3Dblac=
k
face=3DArial><span style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font=
-family:
Arial'>The kernel is the default redhat 8.0, kernel 2.4.18-14smp.<span
style=3D"mso-spacerun: yes">&nbsp; </span>Any thoughts?<o:p></o:p></span></=
font></span></p>

<p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 color=3Dblac=
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<p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 color=3Dblac=
k
face=3DArial><span style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font=
-family:
Arial'>- Bill Stasior</span></font></span><span class=3DEmailStyle15><font
size=3D2 color=3Dblack><span style=3D'font-size:10.0pt;mso-bidi-font-size:1=
2.0pt;
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