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However, >> + for some specific cases, this 9-layer topology might not be desired. >> + One example would be sending traffic to queues that are not a multiple >> + of 8. Because the maximum radix is limited to 8 in 9-layer topology, >> + the 9th queue has a different parent than the rest, and it's given >> + more bandwidth credits. This causes a problem when the system is >> + sending traffic to 9 queues: >> + >> + | tx_queue_0_packets: 24163396 >> + | tx_queue_1_packets: 24164623 >> + | tx_queue_2_packets: 24163188 >> + | tx_queue_3_packets: 24163701 >> + | tx_queue_4_packets: 24163683 >> + | tx_queue_5_packets: 24164668 >> + | tx_queue_6_packets: 23327200 >> + | tx_queue_7_packets: 24163853 >> + | tx_queue_8_packets: 91101417 < Too much traffic is sent from 9th >> + >> ... >> + To verify that value has been set: >> + $ devlink dev param show pci/0000:16:00.0 name tx_scheduling_layers >> > > For consistency with other code blocks, format above as such: > > ---- >8 ---- > diff --git a/Documentation/networking/devlink/ice.rst b/Documentation/networking/devlink/ice.rst > index 830c04354222f8..0039ca45782400 100644 > --- a/Documentation/networking/devlink/ice.rst > +++ b/Documentation/networking/devlink/ice.rst > @@ -41,15 +41,17 @@ Parameters > more bandwidth credits. This causes a problem when the system is > sending traffic to 9 queues: > > - | tx_queue_0_packets: 24163396 > - | tx_queue_1_packets: 24164623 > - | tx_queue_2_packets: 24163188 > - | tx_queue_3_packets: 24163701 > - | tx_queue_4_packets: 24163683 > - | tx_queue_5_packets: 24164668 > - | tx_queue_6_packets: 23327200 > - | tx_queue_7_packets: 24163853 > - | tx_queue_8_packets: 91101417 < Too much traffic is sent from 9th > + .. code-block:: shell > + > + tx_queue_0_packets: 24163396 > + tx_queue_1_packets: 24164623 > + tx_queue_2_packets: 24163188 > + tx_queue_3_packets: 24163701 > + tx_queue_4_packets: 24163683 > + tx_queue_5_packets: 24164668 > + tx_queue_6_packets: 23327200 > + tx_queue_7_packets: 24163853 > + tx_queue_8_packets: 91101417 < Too much traffic is sent from 9th > > To address this need, you can switch to a 5-layer topology, which > changes the maximum topology radix to 512. With this enhancement, > @@ -67,7 +69,10 @@ Parameters > You must do PCI slot powercycle for the selected topology to take effect. > > To verify that value has been set: > - $ devlink dev param show pci/0000:16:00.0 name tx_scheduling_layers > + > + .. code-block:: shell > + > + $ devlink dev param show pci/0000:16:00.0 name tx_scheduling_layers > > Info versions > ============= > > Thanks. > Thank You for reporting that. I will verify this issue soon.