Re: watchdog timer

Bob Ciotti Fri, 18 May 2012 12:23:34 -0700


On 05/18/2012 08:10 AM, Ira Weiny wrote:

On Fri, 18 May 2012 07:35:28 -0700
Bob Ciotti<[email protected]>  wrote:

On 05/18/2012 06:07 AM, Hal Rosenstock wrote:
  >  On 5/18/2012 2:05 AM, Bob Ciotti wrote:
  >>
  >>
  >>  I'm seeing lots of these messages in SM log:
  >>
  >>  May 17 22:36:04 947774 [DA234710] 0x01 ->   log_trap_info: Received
  >>  Generic Notice type:1 num:131 (Flow Control Update watchdog timer
  >>  expired) Producer:2 (Switch) from LID:444 Port 5 TID:0x0000000000000025
  >>
  >>  the referenced port is a switch to HCA link.
  >>
  >>  I've seen this in cases where there was bad hardware. Spec says failure
  >>  in flow control machine on other end. But lets assume hardware was good.
  >>  When could this occur?


 From my understanding it could occur when the SM programs a VL to be 
operational on one end of the link but _not_ the other.

  >
  >  Do OperationalVLs match on both sides of the link ?  Are you
  >  using/configuring QoS ?
  >


One "issue" we found with OpenSM is that if you turn QoS off then it will _not_ program 
any SL2VL or VLArb tables to the hardware.  This could cause issues when switching back and forth 
from QoS and not QoS since some of the hardware could have settings from previous QoS runs.  Or if 
the hardware did not have acceptable defaults when powered on.  Our solution was to turn QoS on and 
simply change the settings to mimic the default configuration (ie no QoS).  I thought about 
implementing a patch to OpenSM which would always program some default settings when QoS was 
disabled but decided that it would to much trouble and that turning "QoS" on was 
acceptable for our machines.


!!!
Ira gets the prize.
Looks like a stale QoS config may have been causing the issue, although it 
looked OK. I forced it to old defaults and things now work.
Still don't understand why the QoS settings broke it in the first place. Thats 
unresolved.



There are two separate fabric on each port of 2 port HCA.
Issue is seen on both fabrics.
Normally we use QoS on both fabrics. QoS now disabled on
ib0 on hca port 1:

r327i7n0 ~ # smpquery portinfo 248 | grep VL
VLCap:...........................VL0-7
VLHighLimit:.....................4
VLArbHighCap:....................8
VLArbLowCap:.....................8
VLStallCount:....................0
OperVLs:.........................VL0-7
r327i7n0 ~ # smpquery -D portinfo 0 1 | grep VL
VLCap:...........................VL0-7
VLHighLimit:.....................4
VLArbHighCap:....................8
VLArbLowCap:.....................8
VLStallCount:....................0
OperVLs:.........................VL0-7
r327i7n0 ~ # smpquery -D portinfo 0,1 1 | grep VL
VLCap:...........................VL0-7
VLHighLimit:.....................4
VLArbHighCap:....................8
VLArbLowCap:.....................8
VLStallCount:....................7
OperVLs:.........................VL0-7


This looks like the situation we had where OperVLs were equal and we were 
getting this error.  In our situation the FW in the switch had a bug.

Ira


r327i7n0 ~ # ibstat
CA 'mlx4_0'
       CA type: MT4099
       Number of ports: 2
       Firmware version: 2.10.4350
       Hardware version: 0
       Node GUID: 0x0002c90300336b20
       System image GUID: 0x0002c90300336b23
       Port 1:
               State: Active
               Physical state: LinkUp
               Rate: 56
               Base lid: 248
               LMC: 0
               SM lid: 1
               Capability mask: 0x02514868
               Port GUID: 0x0002c90300336b21
               Link layer: InfiniBand
       Port 2:
               State: Active
               Physical state: LinkUp
               Rate: 56
               Base lid: 1971
               LMC: 0
               SM lid: 1685
               Capability mask: 0x02514868
               Port GUID: 0x0002c90300336b22
               Link layer: InfiniBand

r327i7n0 ~ # smpquery -D nodeinfo 0,1 1
# Node info: DR path slid 65535; dlid 65535; 0,1
BaseVers:........................1
ClassVers:.......................1
NodeType:........................Switch
NumPorts:........................36
SystemGuid:......................0x080069000000a4db
Guid:............................0x080069000000a4d8
PortGuid:........................0x080069000000a4d8
PartCap:.........................8
DevId:...........................0xc738
Revision:........................0x000000a1
LocalPort:.......................1
VendorId:........................0x0002c9

r327i7n0 ~ # smpquery -D nodedesc 0,1
Node Description:.SwitchX -  Mellanox Technologies

r327i7n0 ~ # smpquery -D sl2vl 0,1 1
# SL2VL table: DR path slid 65535; dlid 65535; 0,1
#                 SL: | 0| 1| 2| 3| 4| 5| 6| 7| 8| 9|10|11|12|13|14|15|
ports: in  0, out  1: | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|
ports: in  1, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in  2, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in  3, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in  4, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in  5, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in  6, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in  7, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in  8, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in  9, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 10, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 11, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 12, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 13, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 14, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 15, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 16, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 17, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 18, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 19, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 20, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 21, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 22, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 23, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 24, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 25, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 26, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 27, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 28, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 29, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 30, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 31, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 32, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 33, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 34, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 35, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|
ports: in 36, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 0| 1| 2| 3| 4| 5| 6| 7|

r327i7n0 ~ # smpquery -D sl2vl 0 1
# SL2VL table: DR path slid 65535; dlid 65535; 0
#                 SL: | 0| 1| 2| 3| 4| 5| 6| 7| 8| 9|10|11|12|13|14|15|
ports: in  0, out  0: | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|

r327i7n0 ~ # smpquery -D vlarb 0,1 1
# VLArbitration tables: DR path slid 65535; dlid 65535; 0,1 port 1 LowCap 8 
HighCap 8
# Low priority VL Arbitration Table:
VL    : |0x0 |0x1 |0x2 |0x3 |0x4 |0x5 |0x6 |0x7 |
WEIGHT: |0x1 |0x1 |0x1 |0x1 |0x1 |0x1 |0x1 |0x1 |
# High priority VL Arbitration Table:
VL    : |0x0 |0x1 |0x2 |0x3 |0x4 |0x5 |0x6 |0x7 |
WEIGHT: |0x1 |0x1 |0x1 |0x1 |0x1 |0x1 |0x1 |0x1 |

r327i7n0 ~ # smpquery -D vlarb 0 1
# VLArbitration tables: DR path slid 65535; dlid 65535; 0 port 1 LowCap 8 
HighCap 8
# Low priority VL Arbitration Table:
VL    : |0x0 |0x1 |0x2 |0x3 |0x4 |0x5 |0x6 |0x7 |
WEIGHT: |0x20|0x20|0x20|0x20|0x20|0x20|0x20|0x20|
# High priority VL Arbitration Table:
VL    : |0x0 |0x1 |0x2 |0x3 |0x4 |0x5 |0x6 |0x7 |
WEIGHT: |0x0 |0x0 |0x0 |0x0 |0x0 |0x0 |0x0 |0x0 |


on ib1, HCA port 2, Qos is enabled:

r327i7n0 ~ # smpquery -P2 -D sl2vl 0 2
# SL2VL table: DR path slid 65535; dlid 65535; 0
#                 SL: | 0| 1| 2| 3| 4| 5| 6| 7| 8| 9|10|11|12|13|14|15|
ports: in  0, out  0: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|

r327i7n0 ~ # smpquery -P2 -D sl2vl 0,2 1
# SL2VL table: DR path slid 65535; dlid 65535; 0,2
#                 SL: | 0| 1| 2| 3| 4| 5| 6| 7| 8| 9|10|11|12|13|14|15|
ports: in  0, out  1: | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|
ports: in  1, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in  2, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in  3, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in  4, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in  5, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in  6, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in  7, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in  8, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in  9, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 10, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 11, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 12, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 13, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 14, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 15, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 16, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 17, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 18, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 19, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 20, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 21, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 22, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 23, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 24, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 25, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 26, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 27, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 28, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 29, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 30, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 31, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 32, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 33, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 34, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 35, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|
ports: in 36, out  1: | 0| 1| 2| 3| 4| 5| 6| 7| 3| 4| 5| 6| 7| 3| 4| 5|

r327i7n0 ~ # smpquery -P2 -D vlarb 0,2 1
# VLArbitration tables: DR path slid 65535; dlid 65535; 0,2 port 1 LowCap 8 
HighCap 8
# Low priority VL Arbitration Table:
VL    : |0x0 |0x1 |0x2 |0x3 |0x4 |0x5 |0x6 |0x7 |
WEIGHT: |0x0 |0x0 |0x0 |0x40|0x40|0x40|0x40|0x40|
# High priority VL Arbitration Table:
VL    : |0x0 |0x1 |0x2 |0x0 |0x0 |0x0 |0x0 |0x0 |
WEIGHT: |0x80|0x40|0x40|0x0 |0x0 |0x0 |0x0 |0x0 |

r327i7n0 ~ # smpquery -P2 -D vlarb 0 2
# VLArbitration tables: DR path slid 65535; dlid 65535; 0 port 2 LowCap 8 
HighCap 8
# Low priority VL Arbitration Table:
VL    : |0x0 |0x1 |0x2 |0x3 |0x4 |0x5 |0x6 |0x7 |
WEIGHT: |0x0 |0x0 |0x0 |0x40|0x40|0x40|0x40|0x40|
# High priority VL Arbitration Table:
VL    : |0x0 |0x1 |0x2 |0x0 |0x0 |0x0 |0x0 |0x0 |
WEIGHT: |0x80|0x40|0x40|0x0 |0x0 |0x0 |0x0 |0x0 |

Only in the case of FW bug?


I don't think flow control is performed by FW.

Any tunable's that might impact this?


No IBA standard ones AFAIK. Who's the HCA vendor ?

-- Hal

bob
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--
Ira Weiny
Member of Technical Staff
Lawrence Livermore National Lab
925-423-8008
[email protected]

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Re: watchdog timer

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