Author: arybchik
Date: Fri Feb 27 07:39:09 2015
New Revision: 279351
URL: https://svnweb.freebsd.org/changeset/base/279351
Log:
sfxge: expect required init_state on data path and in periodic calls
With the patch applied the number of instruction events is 1% less and
number of mispredicted branch events is 5% less under multistream TCP
traffic load close to line rate.
Sponsored by: Solarflare Communications, Inc.
Approved by: gnn (mentor)
Modified:
head/sys/dev/sfxge/sfxge_ev.c
head/sys/dev/sfxge/sfxge_intr.c
head/sys/dev/sfxge/sfxge_port.c
head/sys/dev/sfxge/sfxge_rx.c
head/sys/dev/sfxge/sfxge_tx.c
Modified: head/sys/dev/sfxge/sfxge_ev.c
==============================================================================
--- head/sys/dev/sfxge/sfxge_ev.c Fri Feb 27 04:45:47 2015
(r279350)
+++ head/sys/dev/sfxge/sfxge_ev.c Fri Feb 27 07:39:09 2015
(r279351)
@@ -103,7 +103,7 @@ sfxge_ev_rx(void *arg, uint32_t label, u
KASSERT(evq->index == rxq->index,
("evq->index != rxq->index"));
- if (rxq->init_state != SFXGE_RXQ_STARTED)
+ if (__predict_false(rxq->init_state != SFXGE_RXQ_STARTED))
goto done;
expected = rxq->pending++ & rxq->ptr_mask;
@@ -256,7 +256,7 @@ sfxge_ev_tx(void *arg, uint32_t label, u
KASSERT(evq->index == txq->evq_index,
("evq->index != txq->evq_index"));
- if (txq->init_state != SFXGE_TXQ_STARTED)
+ if (__predict_false(txq->init_state != SFXGE_TXQ_STARTED))
goto done;
stop = (id + 1) & txq->ptr_mask;
@@ -433,7 +433,7 @@ sfxge_ev_stat_update(struct sfxge_softc
SFXGE_ADAPTER_LOCK(sc);
- if (sc->evq[0]->init_state != SFXGE_EVQ_STARTED)
+ if (__predict_false(sc->evq[0]->init_state != SFXGE_EVQ_STARTED))
goto out;
now = ticks;
@@ -598,8 +598,8 @@ sfxge_ev_qpoll(struct sfxge_evq *evq)
SFXGE_EVQ_LOCK(evq);
- if (evq->init_state != SFXGE_EVQ_STARTING &&
- evq->init_state != SFXGE_EVQ_STARTED) {
+ if (__predict_false(evq->init_state != SFXGE_EVQ_STARTING &&
+ evq->init_state != SFXGE_EVQ_STARTED)) {
rc = EINVAL;
goto fail;
}
Modified: head/sys/dev/sfxge/sfxge_intr.c
==============================================================================
--- head/sys/dev/sfxge/sfxge_intr.c Fri Feb 27 04:45:47 2015
(r279350)
+++ head/sys/dev/sfxge/sfxge_intr.c Fri Feb 27 07:39:09 2015
(r279351)
@@ -134,7 +134,7 @@ sfxge_intr_message(void *arg)
KASSERT(intr->type == EFX_INTR_MESSAGE,
("intr->type != EFX_INTR_MESSAGE"));
- if (intr->state != SFXGE_INTR_STARTED)
+ if (__predict_false(intr->state != SFXGE_INTR_STARTED))
return;
(void)efx_intr_status_message(enp, index, &fatal);
Modified: head/sys/dev/sfxge/sfxge_port.c
==============================================================================
--- head/sys/dev/sfxge/sfxge_port.c Fri Feb 27 04:45:47 2015
(r279350)
+++ head/sys/dev/sfxge/sfxge_port.c Fri Feb 27 07:39:09 2015
(r279351)
@@ -50,7 +50,7 @@ sfxge_mac_stat_update(struct sfxge_softc
SFXGE_PORT_LOCK_ASSERT_OWNED(port);
- if (port->init_state != SFXGE_PORT_STARTED) {
+ if (__predict_false(port->init_state != SFXGE_PORT_STARTED)) {
rc = 0;
goto out;
}
@@ -241,7 +241,7 @@ sfxge_port_wanted_fc_handler(SYSCTL_HAND
SFXGE_PORT_LOCK(port);
if (port->wanted_fc != fcntl) {
- if (port->init_state == SFXGE_PORT_STARTED)
+ if (__predict_false(port->init_state == SFXGE_PORT_STARTED))
error = efx_mac_fcntl_set(sc->enp,
port->wanted_fc,
B_TRUE);
@@ -272,7 +272,8 @@ sfxge_port_link_fc_handler(SYSCTL_HANDLE
port = &sc->port;
SFXGE_PORT_LOCK(port);
- if (port->init_state == SFXGE_PORT_STARTED && SFXGE_LINK_UP(sc))
+ if (__predict_true(port->init_state == SFXGE_PORT_STARTED) &&
+ SFXGE_LINK_UP(sc))
efx_mac_fcntl_get(sc->enp, &wanted_fc, &link_fc);
else
link_fc = 0;
@@ -327,7 +328,7 @@ sfxge_mac_poll_work(void *arg, int npend
SFXGE_PORT_LOCK(port);
- if (port->init_state != SFXGE_PORT_STARTED)
+ if (__predict_false(port->init_state != SFXGE_PORT_STARTED))
goto done;
/* This may sleep waiting for MCDI completion */
@@ -394,7 +395,7 @@ sfxge_mac_filter_set(struct sfxge_softc
* lock is held in sleeping thread. Both problems are repeatable
* on LAG with LACP proto bring up.
*/
- if (port->init_state == SFXGE_PORT_STARTED)
+ if (__predict_true(port->init_state == SFXGE_PORT_STARTED))
rc = sfxge_mac_filter_set_locked(sc);
else
rc = 0;
@@ -518,7 +519,7 @@ sfxge_phy_stat_update(struct sfxge_softc
SFXGE_PORT_LOCK_ASSERT_OWNED(port);
- if (port->init_state != SFXGE_PORT_STARTED) {
+ if (__predict_false(port->init_state != SFXGE_PORT_STARTED)) {
rc = 0;
goto out;
}
Modified: head/sys/dev/sfxge/sfxge_rx.c
==============================================================================
--- head/sys/dev/sfxge/sfxge_rx.c Fri Feb 27 04:45:47 2015
(r279350)
+++ head/sys/dev/sfxge/sfxge_rx.c Fri Feb 27 07:39:09 2015
(r279351)
@@ -209,7 +209,7 @@ sfxge_rx_qfill(struct sfxge_rxq *rxq, un
SFXGE_EVQ_LOCK_ASSERT_OWNED(evq);
- if (rxq->init_state != SFXGE_RXQ_STARTED)
+ if (__predict_false(rxq->init_state != SFXGE_RXQ_STARTED))
return;
rxfill = rxq->added - rxq->completed;
@@ -269,7 +269,7 @@ void
sfxge_rx_qrefill(struct sfxge_rxq *rxq)
{
- if (rxq->init_state != SFXGE_RXQ_STARTED)
+ if (__predict_false(rxq->init_state != SFXGE_RXQ_STARTED))
return;
/* Make sure the queue is full */
@@ -760,7 +760,7 @@ sfxge_rx_qcomplete(struct sfxge_rxq *rxq
rx_desc = &rxq->queue[id];
m = rx_desc->mbuf;
- if (rxq->init_state != SFXGE_RXQ_STARTED)
+ if (__predict_false(rxq->init_state != SFXGE_RXQ_STARTED))
goto discard;
if (rx_desc->flags & (EFX_ADDR_MISMATCH | EFX_DISCARD))
Modified: head/sys/dev/sfxge/sfxge_tx.c
==============================================================================
--- head/sys/dev/sfxge/sfxge_tx.c Fri Feb 27 04:45:47 2015
(r279350)
+++ head/sys/dev/sfxge/sfxge_tx.c Fri Feb 27 07:39:09 2015
(r279351)
@@ -311,7 +311,7 @@ static int sfxge_tx_queue_mbuf(struct sf
if (mbuf->m_pkthdr.csum_flags & CSUM_TSO)
prefetch_read_many(mbuf->m_data);
- if (txq->init_state != SFXGE_TXQ_STARTED) {
+ if (__predict_false(txq->init_state != SFXGE_TXQ_STARTED)) {
rc = EINTR;
goto reject;
}
@@ -1143,7 +1143,7 @@ sfxge_tx_qunblock(struct sfxge_txq *txq)
SFXGE_EVQ_LOCK_ASSERT_OWNED(evq);
- if (txq->init_state != SFXGE_TXQ_STARTED)
+ if (__predict_false(txq->init_state != SFXGE_TXQ_STARTED))
return;
SFXGE_TXQ_LOCK(txq);
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