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<TITLE>RE: [openib-general] Shared Receive Queue</TITLE>
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<P><FONT SIZE=2>which HW & FW are you using?</FONT>
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<P><FONT SIZE=2>-----Original Message-----</FONT>
<BR><FONT SIZE=2>From: Roland Dreier [<A HREF="mailto:rolandd@cisco.com">mailto:rolandd@cisco.com</A>]</FONT>
<BR><FONT SIZE=2>Sent: Tuesday, July 26, 2005 5:38 PM</FONT>
<BR><FONT SIZE=2>To: Galen M. Shipman</FONT>
<BR><FONT SIZE=2>Cc: openib-general@openib.org</FONT>
<BR><FONT SIZE=2>Subject: Re: [openib-general] Shared Receive Queue</FONT>
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<P><FONT SIZE=2> Galen> We have software which uses the mellanox shared receive</FONT>
<BR><FONT SIZE=2> Galen> queue and we are seeing a substantial performance penalty</FONT>
<BR><FONT SIZE=2> Galen> (on the order of 4-5 usec on 0 byte messages). I don't know</FONT>
<BR><FONT SIZE=2> Galen> all the technical details but if you could keep this in</FONT>
<BR><FONT SIZE=2> Galen> mind when working on the shared receive queue perhaps the</FONT>
<BR><FONT SIZE=2> Galen> performance penalty could be much less in gen2.</FONT>
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<P><FONT SIZE=2>Is this performance penalty in the software? It seems much more</FONT>
<BR><FONT SIZE=2>likely that the issue is in the hardware implementation of SRQ.</FONT>
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<P><FONT SIZE=2> - R.</FONT>
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