diff options
| author | Mike Belopuhov <mikeb@cvs.openbsd.org> | 2016-02-05 10:34:53 +0000 |
|---|---|---|
| committer | Mike Belopuhov <mikeb@cvs.openbsd.org> | 2016-02-05 10:34:53 +0000 |
| commit | 60bcac65ef6f91e18690176faa44f38f5f0fb007 (patch) | |
| tree | 8f1c27c120bc42018a76a4df40ec5c40667c9d53 /sys/dev/pv | |
| parent | cfa4a11bbd6611d56cfe420867c78827d023e406 (diff) | |
Simple moderation of Tx completion notifications
Follow FreeBSD and schedule the next Tx completion event to fire
when about half of the packet segments scheduled for transmission
are consumed.
Diffstat (limited to 'sys/dev/pv')
| -rw-r--r-- | sys/dev/pv/if_xnf.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sys/dev/pv/if_xnf.c b/sys/dev/pv/if_xnf.c index cf935b4be54..64188624573 100644 --- a/sys/dev/pv/if_xnf.c +++ b/sys/dev/pv/if_xnf.c @@ -1,4 +1,4 @@ -/* $OpenBSD: if_xnf.c,v 1.16 2016/01/29 18:49:06 mikeb Exp $ */ +/* $OpenBSD: if_xnf.c,v 1.17 2016/02/05 10:34:52 mikeb Exp $ */ /* * Copyright (c) 2015, 2016 Mike Belopuhov @@ -663,7 +663,8 @@ xnf_txeof(struct xnf_softc *sc) if (pkts > 0) { sc->sc_tx_cons = cons; - txr->txr_cons_event = cons + 1; + txr->txr_cons_event = cons + + ((txr->txr_prod - cons) >> 1) + 1; bus_dmamap_sync(sc->sc_dmat, sc->sc_tx_rmap, 0, 0, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); pkts = 0; |