HI,
The number I sent you were measured using netperf TCP_STREAM test. With
unmodified Mellanox ofed 1.4 running on high end hosts.
- Amir
On 06/18/2009 09:55 AM, Zafar Gilani wrote:
Hi Amir,
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)?
Thanks in advance!
On Thu, Jun 11, 2009 at 11:22 AM, Amir Vadai <[email protected]
<mailto:[email protected]>> wrote:
Hi Zafar,
I am the maintainer of SDP in OFED.
The current SDP implementation does not have ZCopy. What we have
is BCopy and something that we call BZcopy.
Small packets (<=32k) are sent using BCopy - meaning the SEND verb
is in use and data is not zero copied.
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.
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.
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.
- Amir
Best Regards,
Zafar
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