All of lore.kernel.org
 help / color / mirror / Atom feed
From: Gerben Roest <g.roest-99SnrGqf+M9mR6Xm/wNWPw@public.gmane.org>
Cc: "linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
	<linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: Problems with link, opensm complains IB_SA_MAD_STATUS_REQ_INVALID
Date: Fri, 16 Dec 2011 16:37:52 +0100	[thread overview]
Message-ID: <4EEB65D0.8040802@grepit.nl> (raw)
In-Reply-To: <4EEB4362.1050505-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>

On 16-12-2011 14:10, Hal Rosenstock wrote:

>> They should be DDR cards. Does Rate=2 mean DDR?
> 
> No; it means 1x SDR (lowest speed/width). 4x DDR would be rate 6 (20
> Gbps). See IBA 1.2.1 vol 1 PathRecord SA attribute Rate component.
> 
> By default, OpenSM sets the rate for the IPoIB broadcast groups when not
> explicitly specified is rate 3 (10 Gbps) which is 4x SDR.

I have a similar twin node that does work correctly (has DDR IB) and it
says at ibstat: "Rate: 20"
whereas the two that are having problems say "Rate: 2".

Testing with openmpi osu_bw show:

Rate=2:	max bw: 245 MB/s
Rate=20: max bw: 1970 MB/s

greetings,

Gerben
--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

  parent reply	other threads:[~2011-12-16 15:37 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-12-15 23:17 Problems with link, opensm complains IB_SA_MAD_STATUS_REQ_INVALID Gerben Roest
     [not found] ` <4EEA8004.4060103-99SnrGqf+M9mR6Xm/wNWPw@public.gmane.org>
2011-12-16  0:06   ` Ira Weiny
     [not found]     ` <20111215160600.ebccb033.weiny2-i2BcT+NCU+M@public.gmane.org>
2011-12-16  8:56       ` Gerben Roest
     [not found]         ` <4EEB07C3.90803-99SnrGqf+M9mR6Xm/wNWPw@public.gmane.org>
2011-12-16  9:14           ` Alex Netes
2011-12-16 10:46             ` Gerben Roest
     [not found]               ` <4EEB216D.2010407-99SnrGqf+M9mR6Xm/wNWPw@public.gmane.org>
2011-12-16 12:30                 ` Hal Rosenstock
     [not found]                   ` <4EEB39E8.5030601-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2011-12-16 12:55                     ` Gerben Roest
     [not found]                       ` <4EEB3FD3.3080409-99SnrGqf+M9mR6Xm/wNWPw@public.gmane.org>
2011-12-16 13:10                         ` Hal Rosenstock
     [not found]                           ` <4EEB4362.1050505-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2011-12-16 15:37                             ` Gerben Roest [this message]
     [not found]                               ` <4EEB65D0.8040802-99SnrGqf+M9mR6Xm/wNWPw@public.gmane.org>
2011-12-16 15:43                                 ` Hal Rosenstock
     [not found]                                   ` <4EEB6729.8070600-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2011-12-16 15:56                                     ` Gerben Roest

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=4EEB65D0.8040802@grepit.nl \
    --to=g.roest-99snrgqf+m9mr6xm/wnwpw@public.gmane.org \
    --cc=linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.