<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 12 (filtered medium)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal;
font-family:"Arial","sans-serif";
color:navy;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;}
div.Section1
{page:Section1;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang=EN-US link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Another thing to keep in mind is the byte order. The send_wr.remote_ops.vaddr
is a network order value since it gets put on the wire by the hardware in the
RDMA header.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>-Fab<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></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"'>
ofw-bounces@lists.openfabrics.org [mailto:ofw-bounces@lists.openfabrics.org] <b>On
Behalf Of </b>Sean Hefty<br>
<b>Sent:</b> Wednesday, May 14, 2008 9:05 AM<br>
<b>To:</b> 'rakesh thakur'; ofw@lists.openfabrics.org<br>
<b>Cc:</b> tejendra.joshi@gmail.com<br>
<b>Subject:</b> RE: [ofw] RDMA - send for multiple packets (can we use same key
andvaddr + offset)<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>In principal this should work. What did you set for your
transfer size?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Is rdma_vaddr a uint64 or void*? (I’m not sure that adding to
a void * is standardized.)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'>
<p class=MsoNormal style='margin-bottom:12.0pt'>I am able to successfully do a
RDMA_WRITE operation with the given key and given vaddr for the first packet<br>
<i>send_wr.remote_ops.rkey = rdma_key; // #RDMA#<br>
send_wr.remote_ops.vaddr = rdma_vaddr; // #RDMA#</i><br>
<br>
But I am not able to transfer the second packet by changing the rdma_vaddr<br>
<i>send_wr.remote_ops.rkey = rdma_key; // #RDMA#<br>
send_wr.remote_ops.vaddr = rdma_vaddr + pkt_num*pkt_size; // #RDMA to the next
memory location in the same registered buffer</i><br>
<br>
I am not sure whether it is legal to give a different virtual address(vaddr +
offset) associated rdma_key with vaddr for RDMA_WRITE operation?<br>
OR<br>
Do i have to register all buffers individually and obtain different key
associated with it?<br>
OR<br>
Is there a way out to do RDMA_WRITE at different offsets of the
memory(registered) using associated (only) one key?<o:p></o:p></p>
</div>
</div>
</body>
</html>