From df8f66d02df7b44516635edbc8c17b1311cfa0d8 Mon Sep 17 00:00:00 2001
From: Nick Child <nnac123@linux.ibm.com>
Date: Thu, 10 Nov 2022 15:32:18 -0600
Subject: [PATCH] ibmvnic: Update XPS assignments during affinity binding
References: jsc#PED-2322
Patch-mainline: v6.2-rc1
Git-commit: df8f66d02df7b44516635edbc8c17b1311cfa0d8
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>
Acked-by: Michal Suchanek <msuchanek@suse.de>
---
drivers/net/ethernet/ibm/ibmvnic.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 2fc0d50dbb86..e19a6bb3f444 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -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++) {
--
2.35.3