Re: [PATCH 3/3] IB core: Display 64 bit counters from the extended set

[Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>]

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On 12/15/2015 04:46 PM, Doug Ledford wrote:
> On 12/15/2015 04:42 PM, Hal Rosenstock wrote:
>> On 12/15/2015 4:20 PM, Jason Gunthorpe wrote:
>>>> The unicast/multicast extended counters are not always supported -
>>>>> depends on setting of PerfMgt ClassPortInfo
>>>>> CapabilityMask.IsExtendedWidthSupportedNoIETF (bit 10).
>>
>>> Yes.. certainly this proposed patch needs to account for that and
>>> continue to use the 32 bit ones in that case.
>>
>> There are no 32 bit equivalents of those 4 "IETF" counters ([uni
>> multi]cast [xmit rcv] pkts).
>>
>> When not supported, perhaps it is best not to populate these counters in
>> sysfs so one can discern between counter not supported and 0 value.
>>
>> I'm still working on definitive mthca answer but think the attribute is
>> not supported there. Does anyone out there have an mthca setup where
>> they can try this ?
> 
> Yes.
> 
> 

From my mthca machine:

[root@rdma-dev-04 ~]$ lspci | grep Mellanox
01:00.0 InfiniBand: Mellanox Technologies MT25208 InfiniHost III Ex
(Tavor compatibility mode) (rev 20)
[root@rdma-dev-04 ~]$ perfquery
# Port counters: Lid 36 port 1 (CapMask: 0x00)
PortSelect:......................1
CounterSelect:...................0x0000
SymbolErrorCounter:..............0
LinkErrorRecoveryCounter:........0
LinkDownedCounter:...............0
PortRcvErrors:...................0
PortRcvRemotePhysicalErrors:.....0
PortRcvSwitchRelayErrors:........0
PortXmitDiscards:................0
PortXmitConstraintErrors:........0
PortRcvConstraintErrors:.........0
CounterSelect2:..................0x00
LocalLinkIntegrityErrors:........0
ExcessiveBufferOverrunErrors:....0
VL15Dropped:.....................1
PortXmitData:....................2470620192
PortRcvData:.....................2401094563
PortXmitPkts:....................6363544
PortRcvPkts:.....................6321251
[root@rdma-dev-04 ~]$ perfquery -x
ibwarn: [29831] dump_perfcounters: PerfMgt ClassPortInfo 0x0; No
extended counter support indicated

perfquery: iberror: failed: perfextquery

So, no extended counters on this device.

-- 
Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
              GPG KeyID: 0E572FDD



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