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Add TransmissionOverrun as per defined by IEEE 802.1Q Bridges. TransmissionOverrun counter shall be incremented if the implementation detects that a frame from a given queue is still being transmitted by the MAC when that gate-close event for that queue occurs. This counter is utilised by the Certification conformance test to inform the user application whether any packets are currently being transmitted on a particular queue during a gate-close event. Intel Discrete I225/I226 have a mechanism to not transmit a packets if the gate open time is insufficient for the packet transmission by setting the Strict_End bit. Thus, it is expected for this counter to be always zero at this moment. Inspired from enetc_taprio_stats() and enetc_taprio_queue_stats(), now driver also report the tx_overruns counter per traffic class. User can get this counter by using below command: 1) tc -s qdisc show dev <interface> root 2) tc -s class show dev <interface> Test Result (Before): class mq :1 root Sent 1289 bytes 20 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 class mq :2 root Sent 124 bytes 2 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 class mq :3 root Sent 46028 bytes 86 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 class mq :4 root Sent 2596 bytes 14 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 Test Result (After): class taprio 100:1 root Sent 8491 bytes 38 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 Transmit overruns: 0 class taprio 100:2 root Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 Transmit overruns: 0 class taprio 100:3 root Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 Transmit overruns: 0 class taprio 100:4 root Sent 994 bytes 11 pkt (dropped 0, overlimits 0 requeues 1) backlog 0b 0p requeues 1 Transmit overruns: 0 Signed-off-by: Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@intel.com> Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com> Tested-by: Naama Meir <naamax.meir@linux.intel.com> Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com> Link: https://lore.kernel.org/r/20230714201428.1718097-1-anthony.l.nguyen@intel.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.