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Defer rundown (m_freem) of completed transmit buffers for no longer

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than 1 second.
This commit is contained in:
David Greenman 1998-10-22 02:00:49 +00:00
parent 24166bb84b
commit c8cc6fca3c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=40559
2 changed files with 44 additions and 2 deletions
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23
sys/dev/fxp/if_fxp.c
View file

@ -27,7 +27,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: if_fxp.c,v 1.56 1998/10/10 19:26:40 dg Exp $
* $Id: if_fxp.c,v 1.57 1998/10/11 06:28:54 dg Exp $
*/
/*
@ -1072,6 +1072,7 @@ fxp_stats_update(arg)
struct fxp_softc *sc = arg;
struct ifnet *ifp = &sc->sc_if;
struct fxp_stats *sp = sc->fxp_stats;
struct fxp_cb_tx *txp;
int s;
ifp->if_opackets += sp->tx_good;
@ -1080,6 +1081,9 @@ fxp_stats_update(arg)
ifp->if_ipackets += sp->rx_good;
sc->rx_idle_secs = 0;
} else {
/*
* Receiver's been idle for another second.
*/
sc->rx_idle_secs++;
}
ifp->if_ierrors +=
@ -1097,6 +1101,23 @@ fxp_stats_update(arg)
tx_threshold += 64;
}
s = splimp();
/*
* Release any xmit buffers that have completed DMA. This isn't
* strictly necessary to do here, but it's advantagous for mbufs
* with external storage to be released in a timely manner rather
* than being defered for a potentially long time. This limits
* the delay to a maximum of one second.
*/
for (txp = sc->cbl_first; sc->tx_queued &&
(txp->cb_status & FXP_CB_STATUS_C) != 0;
txp = txp->next) {
if (txp->mb_head != NULL) {
m_freem(txp->mb_head);
txp->mb_head = NULL;
}
sc->tx_queued--;
}
sc->cbl_first = txp;
/*
* If we haven't received any packets in FXP_MAC_RX_IDLE seconds,
* then assume the receiver has locked up and attempt to clear

23
sys/pci/if_fxp.c
View file

@ -27,7 +27,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: if_fxp.c,v 1.56 1998/10/10 19:26:40 dg Exp $
* $Id: if_fxp.c,v 1.57 1998/10/11 06:28:54 dg Exp $
*/
/*
@ -1072,6 +1072,7 @@ fxp_stats_update(arg)
struct fxp_softc *sc = arg;
struct ifnet *ifp = &sc->sc_if;
struct fxp_stats *sp = sc->fxp_stats;
struct fxp_cb_tx *txp;
int s;
ifp->if_opackets += sp->tx_good;
@ -1080,6 +1081,9 @@ fxp_stats_update(arg)
ifp->if_ipackets += sp->rx_good;
sc->rx_idle_secs = 0;
} else {
/*
* Receiver's been idle for another second.
*/
sc->rx_idle_secs++;
}
ifp->if_ierrors +=
@ -1097,6 +1101,23 @@ fxp_stats_update(arg)
tx_threshold += 64;
}
s = splimp();
/*
* Release any xmit buffers that have completed DMA. This isn't
* strictly necessary to do here, but it's advantagous for mbufs
* with external storage to be released in a timely manner rather
* than being defered for a potentially long time. This limits
* the delay to a maximum of one second.
*/
for (txp = sc->cbl_first; sc->tx_queued &&
(txp->cb_status & FXP_CB_STATUS_C) != 0;
txp = txp->next) {
if (txp->mb_head != NULL) {
m_freem(txp->mb_head);
txp->mb_head = NULL;
}
sc->tx_queued--;
}
sc->cbl_first = txp;
/*
* If we haven't received any packets in FXP_MAC_RX_IDLE seconds,
* then assume the receiver has locked up and attempt to clear