From mboxrd@z Thu Jan  1 00:00:00 1970
From: Yevgeny Kliteynik <kliteyn-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
Subject: Re: QOS setup issue with opensm
Date: Tue, 24 Nov 2009 12:02:09 +0200
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To: Vincent Ficet <jean-vincent.ficet-6ktuUTfB/bM@public.gmane.org>
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
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Vincent Ficet wrote:
> Hello,
> 
> I'm running into trouble when trying to configure QoS on opensm 3.3.2. I
> tried several QoS setups, but unfortunately without any luck.
> Could someone please tell me what I'm doing wrong ?
> 
> The different combinations I tried are listed below:
> 
> ###############################################################
> 
> qos-policy.conf:
> 
> qos-ulps
>     default          : 0 # default SL
>     ipoib            : 4 # TCP tests over IB
> end-qos-ulps
> 
> Nov 24 09:26:01 065823 [96B5D910] 0x01 -> __qos_policy_validate_pkey:
> ERR AC15: pkey 0x7FFF in match rule - overriding partition SL (0) with
> QoS Level SL (4)
> 
> ###############################################################
> 
> qos-policy.conf:
> 
> qos-ulps
>     default               : 0 # default SL
>     ipoib, pkey 0x0001    : 4 # TCP tests over IB
> end-qos-ulps
> 
> partitions.conf:
> 
> default=0x7fff,ipoib                    : ALL=full;
> backbone=0x0001,ipoib,defmember=full    : 0x2c9000100d000679,
> 0x2c9000100d00056d;
> 
> Nov 24 09:21:43 526886 [C85A1910] 0x01 -> __qos_policy_validate_pkey:
> ERR AC15: pkey 0x0001 in match rule - overriding partition SL (0) with
> QoS Level SL (4)
> 
> ###############################################################
> 
> qos-policy.conf
> 
> qos-ulps
>     default          : 0 # default SL
>     ipoib            : 4 # TCP tests over IB
> end-qos-ulps
> 
> partitions.conf:
> 
> default=0x7fff                          : ALL=full;
> backbone=0x0001,ipoib,defmember=full    : 0x2c9000100d000679,
> 0x2c9000100d00056d;
> 
> Nov 24 09:46:36 576946 [640C7910] 0x01 -> __qos_policy_validate_pkey:
> ERR AC15: pkey 0x7FFF in match rule - overriding partition SL (0) with
> QoS Level SL (4)
> 
> ###############################################################
> 
> qos-policy.conf
> 
> qos-ulps
>     default          : 0 # default SL
>     ipoib            : 4 # TCP tests over IB
> end-qos-ulps
> 
> default=0x7fff                        : ALL=full;
> backbone=0x0001,defmember=full        : 0x2c9000100d000679,
> 0x2c9000100d00056d;
> 
> Nov 24 09:51:23 666860 [6EA6B910] 0x01 -> __qos_policy_validate_pkey:
> ERR AC15: pkey 0x7FFF in match rule - overriding partition SL (0) with
> QoS Level SL (4)
> 
> ###############################################################
> 
> Did I make a mistake, or does that sound like an opensm bug ?

It's neither. It's an outcome of OSM being not very user
friendly in QoS configuration :(

You're trying to assign a certain SL to IPoIB, so you
define a partition with a certain pkey, and add a rule
for this pkey in the QoS policy file. So far everything
is OK.
The problem is that SL is part of partition's parameters,
so when you defined the partition as follows:

  default=0x7fff,ipoib       : ALL=full;

you didn't specify SL, and SM used default SL for this
partition. In short, it is as if you defined the partition
as follows:

  default=0x7fff,ipoib,sl=0  : ALL=full;

Now comes the QoS policy rule that says the following:

  ipoib            : 4 # TCP tests over IB

So you have a mismatch between SLs from partition
configuration and QoS policy. SM is aware if this
and uses SL from QoS policy to overwrite the one
that is stored in the partition structure.

So bottom line - your configuration is correct.

-- Yevgeny


> Thanks for your help,
> 
> Vincent
> 
> 
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