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be2net: get rid of TX budget

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Enforcing a budget on the TX completion processing in NAPI doesn't
benefit performance in anyway. Just get rid of it.

Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sathya Perla 2014-09-02 09:56:55 +05:30 committed by David S. Miller
parent c5f156def0
commit c8f64615fb
2 changed files with 11 additions and 21 deletions
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2
drivers/net/ethernet/emulex/benet/be.h
View File

@ -114,7 +114,6 @@ static inline char *nic_name(struct pci_dev *pdev)
#define MAX_ROCE_EQS 5 #define MAX_ROCE_EQS 5
#define MAX_MSIX_VECTORS 32 #define MAX_MSIX_VECTORS 32
#define MIN_MSIX_VECTORS 1 #define MIN_MSIX_VECTORS 1
#define BE_TX_BUDGET 256
#define BE_NAPI_WEIGHT 64 #define BE_NAPI_WEIGHT 64
#define MAX_RX_POST BE_NAPI_WEIGHT /* Frags posted at a time */ #define MAX_RX_POST BE_NAPI_WEIGHT /* Frags posted at a time */
#define RX_FRAGS_REFILL_WM (RX_Q_LEN - MAX_RX_POST) #define RX_FRAGS_REFILL_WM (RX_Q_LEN - MAX_RX_POST)
@ -200,7 +199,6 @@ struct be_eq_obj {
u8 idx; /* array index */ u8 idx; /* array index */
u8 msix_idx; u8 msix_idx;
u16 tx_budget;
u16 spurious_intr; u16 spurious_intr;
struct napi_struct napi; struct napi_struct napi;
struct be_adapter *adapter; struct be_adapter *adapter;

30
drivers/net/ethernet/emulex/benet/be_main.c
View File

@ -2143,7 +2143,6 @@ static int be_evt_queues_create(struct be_adapter *adapter)
napi_hash_add(&eqo->napi); napi_hash_add(&eqo->napi);
aic = &adapter->aic_obj[i]; aic = &adapter->aic_obj[i];
eqo->adapter = adapter; eqo->adapter = adapter;
eqo->tx_budget = BE_TX_BUDGET;
eqo->idx = i; eqo->idx = i;
aic->max_eqd = BE_MAX_EQD; aic->max_eqd = BE_MAX_EQD;
aic->enable = true; aic->enable = true;
@ -2459,20 +2458,19 @@ static inline void lancer_update_tx_err(struct be_tx_obj *txo, u32 status)
} }
} }
static bool be_process_tx(struct be_adapter *adapter, struct be_tx_obj *txo, static void be_process_tx(struct be_adapter *adapter, struct be_tx_obj *txo,
int budget, int idx) int idx)
{ {
struct be_eth_tx_compl *txcp; struct be_eth_tx_compl *txcp;
int num_wrbs = 0, work_done; int num_wrbs = 0, work_done = 0;
u32 compl_status; u32 compl_status;
u16 last_idx;
while ((txcp = be_tx_compl_get(&txo->cq))) {
last_idx = GET_TX_COMPL_BITS(wrb_index, txcp);
num_wrbs += be_tx_compl_process(adapter, txo, last_idx);
work_done++;
for (work_done = 0; work_done < budget; work_done++) {
txcp = be_tx_compl_get(&txo->cq);
if (!txcp)
break;
num_wrbs += be_tx_compl_process(adapter, txo,
GET_TX_COMPL_BITS(wrb_index,
txcp));
compl_status = GET_TX_COMPL_BITS(status, txcp); compl_status = GET_TX_COMPL_BITS(status, txcp);
if (compl_status) { if (compl_status) {
if (lancer_chip(adapter)) if (lancer_chip(adapter))
@ -2497,7 +2495,6 @@ static bool be_process_tx(struct be_adapter *adapter, struct be_tx_obj *txo,
tx_stats(txo)->tx_compl += work_done; tx_stats(txo)->tx_compl += work_done;
u64_stats_update_end(&tx_stats(txo)->sync_compl); u64_stats_update_end(&tx_stats(txo)->sync_compl);
} }
return (work_done < budget); /* Done */
} }
int be_poll(struct napi_struct *napi, int budget) int be_poll(struct napi_struct *napi, int budget)
@ -2506,17 +2503,12 @@ int be_poll(struct napi_struct *napi, int budget)
struct be_adapter *adapter = eqo->adapter; struct be_adapter *adapter = eqo->adapter;
int max_work = 0, work, i, num_evts; int max_work = 0, work, i, num_evts;
struct be_rx_obj *rxo; struct be_rx_obj *rxo;
bool tx_done;
num_evts = events_get(eqo); num_evts = events_get(eqo);
/* Process all TXQs serviced by this EQ */ /* Process all TXQs serviced by this EQ */
for (i = eqo->idx; i < adapter->num_tx_qs; i += adapter->num_evt_qs) { for (i = eqo->idx; i < adapter->num_tx_qs; i += adapter->num_evt_qs)
tx_done = be_process_tx(adapter, &adapter->tx_obj[i], be_process_tx(adapter, &adapter->tx_obj[i], i);
eqo->tx_budget, i);
if (!tx_done)
max_work = budget;
}
if (be_lock_napi(eqo)) { if (be_lock_napi(eqo)) {
/* This loop will iterate twice for EQ0 in which /* This loop will iterate twice for EQ0 in which