Hi,
I'm running ib_send_bw (version 1.20) over ConnectX HCAs on an
Infiniscale III switch. If I run:
ib_send_bw -s 256 -c RC
I get 790 MB/s
ib_send_bw -s 256 -c UD
still gets me 790 MB/s
ib_send_bw -s 256 -c UD -g 1
which runs over a multicast GID/LID gets 790 MB/s when there are two
HCAs on the switch. However:
3 HCAs - 726 MB/s
4 HCAs - 701 MB/s
. . .
12 HCAs - 205 MB/s
I'm trying to understand why this drops off for each new HCA I add to
the switch. All the HCAs and the switch are running the latest firmware
(2.7.0 and 1.0.5 respectively). Only one HCA is transmitting and only
one is receiving. All the other HCAs are quiet.
I'm wondering if anyone has any suggestions on what causes this effect
and how I might deal with it.
Thanks.
Todd
**********************************************************************************************
This e-mail and any documents accompanying it may contain legally privileged and/or confidential information
belonging to Exegy, Inc. Such information may be protected from disclosure by law. The information is
intended for use by only the addressee. If you are not the intended recipient, you are hereby notified that any
disclosure or use of the information is strictly prohibited. If you have received this e-mail in error, please
immediately contact the sender by e-mail or phone regarding instructions for return or destruction and do not
use or disclose the content to others.
**********************************************************************************************
--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
