[dpdk-dev] IXGBE error statistics

[Igor Ryzhov]

Hello, Harry.

Thank you, I'll wait for result of mspdc testing.

About rte_eth_stats - I found that not generic fields of the structure are all deprecated already. I will research xstats API, thank you.

Best regards,
Igor

> 18 сент. 2015 г., в 11:04, Van Haaren, Harry <harry.van.haaren at intel.com> написал(а):
> 
>> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Igor Ryzhov
>> Hello everyone.
> 
> Hi Igor,
> 
>> Investigating IXGBE driver I found an mspdc counter (MAC Short Packet
>> Discard). And I am wondering why this counter is not used in the calculation
>> of total RX errors (ierrors field in rte_eth_stats structure). Is it already a part
>> of another counter, for example, rlec (Receive Length Error)? Or is it a bug?
> 
> There has been a discussion on list recently involving ixgbe stats, and certain
> packets triggering multiple stats registers - the datasheet doesn't mention
> this could be the case for the mspdc register, I will research this issue and
> get back to you.
> 
>> Another one question is about incompleteness of rte_eth_stats structure.
>> IXGBE and other drivers have a lot of counters but only a part of them is
>> represented in rte_eth_stats. Is there any valuable reasons for that or it's
>> just not implemented?
> 
> The rte_eth_stats struct presents the most general statistics that every NIC exposes.
> In 2.1, and extended statistics API was added which allows NICs to expose stats
> that are unique to that NIC. Currently ixgbe is the only driver that has the xstats API
> implemented, I am working on patches to implement the functionality for the other
> Intel drivers.
> 
> As part of testing the xstats implementation for each driver, I can test the exact
> behavior of the mspdc counter, and if it is mis-counted this should become clear.
> 
> Cheers, -Harry