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be2net: assign CPU affinity hints to be2net IRQs 

This patch provides hints to irqbalance to map be2net IRQs to
specific CPU cores. cpumask_set_cpu_local_first() is used, which first
maps IRQs to near NUMA cores; when those cores are exhausted, IRQs are
mapped to far NUMA cores.

Signed-off-by: Padmanabh Ratnakar <padmanabh.ratnakar@emulex.com>
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Padmanabh Ratnakar 2015-03-26 03:05:08 -04:00 committed by David S. Miller
parent 41d25fe092
commit d658d98aa5
2 changed files with 16 additions and 3 deletions
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2
drivers/net/ethernet/emulex/benet/be.h
View File

@ -30,6 +30,7 @@
#include <linux/firmware.h>
#include <linux/slab.h>
#include <linux/u64_stats_sync.h>
#include <linux/cpumask.h>
#include "be_hw.h"
#include "be_roce.h"
@ -183,6 +184,7 @@ struct be_eq_obj {
u16 spurious_intr;
struct napi_struct napi;
struct be_adapter *adapter;
cpumask_var_t affinity_mask;
#ifdef CONFIG_NET_RX_BUSY_POLL
#define BE_EQ_IDLE 0

17
drivers/net/ethernet/emulex/benet/be_main.c
View File

@ -2342,6 +2342,7 @@ static void be_evt_queues_destroy(struct be_adapter *adapter)
napi_hash_del(&eqo->napi);
netif_napi_del(&eqo->napi);
}
free_cpumask_var(eqo->affinity_mask);
be_queue_free(adapter, &eqo->q);
}
}
@ -2357,6 +2358,11 @@ static int be_evt_queues_create(struct be_adapter *adapter)
adapter->cfg_num_qs);
for_all_evt_queues(adapter, eqo, i) {
if (!zalloc_cpumask_var(&eqo->affinity_mask, GFP_KERNEL))
return -ENOMEM;
cpumask_set_cpu_local_first(i, dev_to_node(&adapter->pdev->dev),
eqo->affinity_mask);
netif_napi_add(adapter->netdev, &eqo->napi, be_poll,
BE_NAPI_WEIGHT);
napi_hash_add(&eqo->napi);
@ -3028,6 +3034,8 @@ static int be_msix_register(struct be_adapter *adapter)
status = request_irq(vec, be_msix, 0, eqo->desc, eqo);
if (status)
goto err_msix;
irq_set_affinity_hint(vec, eqo->affinity_mask);
}
return 0;
@ -3072,7 +3080,7 @@ static void be_irq_unregister(struct be_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
struct be_eq_obj *eqo;
int i;
int i, vec;
if (!adapter->isr_registered)
return;
@ -3084,8 +3092,11 @@ static void be_irq_unregister(struct be_adapter *adapter)
}
/* MSIx */
for_all_evt_queues(adapter, eqo, i)
free_irq(be_msix_vec_get(adapter, eqo), eqo);
for_all_evt_queues(adapter, eqo, i) {
vec = be_msix_vec_get(adapter, eqo);
irq_set_affinity_hint(vec, NULL);
free_irq(vec, eqo);
}
done:
adapter->isr_registered = false;