[PATCH net-next] net-next/hinic: Set Rxq irq to specific cpu for NUMA

From: Aviad Krawczyk
Date: Tue Sep 26 2017 - 13:58:52 EST


Set Rxq irq to specific cpu for allocating and receiving the skb from
the same node.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@xxxxxxxxxx>
---
drivers/net/ethernet/huawei/hinic/hinic_rx.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/huawei/hinic/hinic_rx.c b/drivers/net/ethernet/huawei/hinic/hinic_rx.c
index 1d4f712..e2e5cdc 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_rx.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_rx.c
@@ -26,6 +26,7 @@
#include <linux/skbuff.h>
#include <linux/dma-mapping.h>
#include <linux/prefetch.h>
+#include <linux/cpumask.h>
#include <asm/barrier.h>

#include "hinic_common.h"
@@ -171,11 +172,10 @@ static int rx_alloc_pkts(struct hinic_rxq *rxq)
struct hinic_sge sge;
dma_addr_t dma_addr;
struct sk_buff *skb;
- int i, alloc_more;
u16 prod_idx;
+ int i;

free_wqebbs = hinic_get_rq_free_wqebbs(rxq->rq);
- alloc_more = 0;

/* Limit the allocation chunks */
if (free_wqebbs > nic_dev->rx_weight)
@@ -185,7 +185,6 @@ static int rx_alloc_pkts(struct hinic_rxq *rxq)
skb = rx_alloc_skb(rxq, &dma_addr);
if (!skb) {
netdev_err(rxq->netdev, "Failed to alloc Rx skb\n");
- alloc_more = 1;
goto skb_out;
}

@@ -195,7 +194,6 @@ static int rx_alloc_pkts(struct hinic_rxq *rxq)
&prod_idx);
if (!rq_wqe) {
rx_free_skb(rxq, skb, dma_addr);
- alloc_more = 1;
goto skb_out;
}

@@ -211,9 +209,7 @@ static int rx_alloc_pkts(struct hinic_rxq *rxq)
hinic_rq_update(rxq->rq, prod_idx);
}

- if (alloc_more)
- tasklet_schedule(&rxq->rx_task);
-
+ tasklet_schedule(&rxq->rx_task);
return i;
}

@@ -357,7 +353,7 @@ static int rxq_recv(struct hinic_rxq *rxq, int budget)
}

if (pkts)
- tasklet_schedule(&rxq->rx_task); /* hinic_rx_alloc_pkts */
+ tasklet_schedule(&rxq->rx_task); /* rx_alloc_pkts */

u64_stats_update_begin(&rxq->rxq_stats.syncp);
rxq->rxq_stats.pkts += pkts;
@@ -417,6 +413,8 @@ static int rx_request_irq(struct hinic_rxq *rxq)
struct hinic_dev *nic_dev = netdev_priv(rxq->netdev);
struct hinic_hwdev *hwdev = nic_dev->hwdev;
struct hinic_rq *rq = rxq->rq;
+ struct hinic_qp *qp;
+ struct cpumask mask;
int err;

rx_add_napi(rxq);
@@ -432,7 +430,9 @@ static int rx_request_irq(struct hinic_rxq *rxq)
return err;
}

- return 0;
+ qp = container_of(rq, struct hinic_qp, rq);
+ cpumask_set_cpu(qp->q_id % num_online_cpus(), &mask);
+ return irq_set_affinity_hint(rq->irq, &mask);
}

static void rx_free_irq(struct hinic_rxq *rxq)
--
1.9.1