diff options
| author | Yuval Atias <yuvala@mellanox.com> | 2014-05-25 18:47:27 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-06-02 06:16:29 +0400 |
| commit | 70a640d0dae3a9b1b222ce673eb5d92c263ddd61 (patch) | |
| tree | 89dbe2c36c695f2e4c79429f4362bc07df2cc1de /drivers/net/ethernet/mellanox/mlx4/en_cq.c | |
| parent | c8865b64b05b2f4eeefd369373e9c8aeb069e7a1 (diff) | |
| download | linux-70a640d0dae3a9b1b222ce673eb5d92c263ddd61.tar.xz | |
net/mlx4_en: Use affinity hint
The “affinity hint” mechanism is used by the user space
daemon, irqbalancer, to indicate a preferred CPU mask for irqs.
Irqbalancer can use this hint to balance the irqs between the
cpus indicated by the mask.
We wish the HCA to preferentially map the IRQs it uses to numa cores
close to it. To accomplish this, we use cpumask_set_cpu_local_first(), that
sets the affinity hint according the following policy:
First it maps IRQs to “close” numa cores. If these are exhausted, the
remaining IRQs are mapped to “far” numa cores.
Signed-off-by: Yuval Atias <yuvala@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx4/en_cq.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/en_cq.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_cq.c b/drivers/net/ethernet/mellanox/mlx4/en_cq.c index 636963db598a..ea2cd72e5368 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_cq.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_cq.c @@ -118,11 +118,15 @@ int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq, if (cq->is_tx == RX) { if (mdev->dev->caps.comp_pool) { if (!cq->vector) { + struct mlx4_en_rx_ring *ring = + priv->rx_ring[cq->ring]; + sprintf(name, "%s-%d", priv->dev->name, cq->ring); /* Set IRQ for specific name (per ring) */ if (mlx4_assign_eq(mdev->dev, name, rmap, - &cq->vector)) { + &cq->vector, + ring->affinity_mask)) { cq->vector = (cq->ring + 1 + priv->port) % mdev->dev->caps.num_comp_vectors; mlx4_warn(mdev, "Failed assigning an EQ to %s, falling back to legacy EQ's\n", |