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

[Hal Rosenstock <hal-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>]

On 12/15/2015 2:55 PM, Jason Gunthorpe wrote:
> On Tue, Dec 15, 2015 at 01:51:35PM -0600, Christoph Lameter wrote:
>> On Mon, 14 Dec 2015, Hal Rosenstock wrote:
>>
>>>> Mellanox should really confirm this for their hardware matrix.
>>>
>>> I am trying to get definitive answer to this.
>>
>> I was told today on a conf call with a couple of Mellanox employees that
>> extended counters are always available.
> 
> .. and every field is valid?
> 
> I would agree, from my observation, that the two main byte counters
> are always available.

The extended packet counts work but I thought there was a PMA with one
of the extended byte counts wired to 0.

> But not necessarily the others.

The unicast/multicast extended counters are not always supported -
depends on setting of PerfMgt ClassPortInfo
CapabilityMask.IsExtendedWidthSupportedNoIETF (bit 10).

-- Hal

> Jason 
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