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HI,<br>
<br>
The number I sent you were measured using netperf TCP_STREAM test. With
unmodified Mellanox ofed 1.4 running on high end hosts.<br>
<br>
- Amir<br>
<br>
On 06/18/2009 09:55 AM, Zafar Gilani wrote:
<blockquote
cite="mid:7d4423d30906172355x47040970lc11450afdf69a42d@mail.gmail.com"
type="cite">Hi Amir,<br>
<br>
I hope you are fine! I want to carry out benchmark testing to compare
IPoIB and SDP protocols on the cluster I am working on. Where can I get
test cases (such as pt2pt communications) to carry out these tests?
What approach did you use in your benchmark test that you sent me (your
sent message attached)?<br>
<br>
Thanks in advance!<br>
<br>
<div class="gmail_quote">On Thu, Jun 11, 2009 at 11:22 AM, Amir Vadai
<span dir="ltr"><<a moz-do-not-send="true"
href="mailto:amirv@mellanox.co.il">amirv@mellanox.co.il</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi
Zafar,<br>
<br>
I am the maintainer of SDP in OFED.<br>
<br>
The current SDP implementation does not have ZCopy. What we have is
BCopy and something that we call BZcopy.<br>
Small packets (<=32k) are sent using BCopy - meaning the SEND verb
is in use and data is not zero copied.<br>
Packets bigger than 32K are sent using BZcopy - they are also sent
using the SEND verb but they are zero copied on the sender side. on the
RX side packets are memcpy'ed.<br>
When we implement ZCopy it will be automatic too - when sending packets
bigger than a threshold the driver will automatically use RDMA verb
instead of the SEND.<br>
<br>
BTW, your numbers are different that what we measured. See attached.
Was measured on a high end host using QDR IB PCI gen 2 and Mellanox
ofed 1.4.<br>
<br>
- Amir</blockquote>
<div><br>
Best Regards,<br>
Zafar <br>
</div>
</div>
<br>
</blockquote>
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