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13 June 2022, 11:31:42 UTC
Revision 32c1b965f41639081af84cd3f320a81d9c30a06e authored by Sunil Goutham on 29 July 2015, 13:49:38 UTC, committed by David S. Miller on 30 July 2015, 06:52:31 UTC 
net: thunderx: Fix RQ_DROP miscalculation
 
With earlier configured value sufficient number of CQEs are not
being reserved for transmitted packets. Hence under heavy incoming
traffic load, receive notifications will take away most of the CQ
thus transmit notifications will be lost resulting in tx skbs not
being freed.

Finally SQ will be full and it will be stopped, watchdog timer
will kick in. After this fix receive notifications will not take
morethan half of CQ reserving the rest for transmit notifications.

Also changed CQ & SQ sizes from 16k to 4k.
This is also due to the receive notifications taking first half of
CQ under heavy load and time taken by NAPI to clear transmit notifications
will increase with higher queue sizes. Again results in SQ being stopped.

Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 143ceb0
History
Tip revision: 32c1b965f41639081af84cd3f320a81d9c30a06e authored by Sunil Goutham on 29 July 2015, 13:49:38 UTC
net: thunderx: Fix RQ_DROP miscalculation
Tip revision: 32c1b96
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