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ibmvnic: Update XPS assignments during affinity binding 

Transmit Packet Steering (XPS) maps cpu numbers to transmit
queues. By running the same connection on the same set of cpu's,
contention for the queue and cache miss rate can be minimized.
When assigning a cpu mask for a tranmit queues irq number, assign
the same cpu mask as the set of cpu's that XPS should use for that
queue.

Signed-off-by: Thomas Falcon <tlfalcon@linux.ibm.com>
Signed-off-by: Dany Madden <drt@linux.ibm.com>
Signed-off-by: Nick Child <nnac123@linux.ibm.com>
Reviewed-by: Rick Lindsley <ricklind@linux.ibm.com>
Reviewed-by: Haren Myneni <haren@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nick Child 2022-11-10 15:32:18 -06:00 committed by David S. Miller
parent 92125c3a60
commit df8f66d02d
1 changed files with 10 additions and 0 deletions
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10
drivers/net/ethernet/ibm/ibmvnic.c
View File

@ -279,6 +279,16 @@ static void ibmvnic_set_affinity(struct ibmvnic_adapter *adapter)
stride);
if (rc)
goto out;
if (!queue)
continue;
rc = __netif_set_xps_queue(adapter->netdev,
cpumask_bits(queue->affinity_mask),
i, XPS_CPUS);
if (rc)
netdev_warn(adapter->netdev, "%s: Set XPS on queue %d failed, rc = %d.\n",
__func__, i, rc);
}
for (i = 0; i < num_rxqs; i++) {