Author: sephe Date: Fri Feb 5 05:50:53 2016 New Revision: 295306 URL: https://svnweb.freebsd.org/changeset/base/295306
Log: hyperv/hn: Add an option to always do transmission scheduling It is off by default. This eases more experiment on hn(4). Reviewed by: adrian, Hongjiang Zhang <honzhan microsoft com> Approved by: adrian (mentor) MFC after: 1 week Sponsored by: Microsoft OSTC Differential Revision: https://reviews.freebsd.org/D5175 Modified: head/sys/dev/hyperv/netvsc/hv_net_vsc.h head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Modified: head/sys/dev/hyperv/netvsc/hv_net_vsc.h ============================================================================== --- head/sys/dev/hyperv/netvsc/hv_net_vsc.h Fri Feb 5 05:44:31 2016 (r295305) +++ head/sys/dev/hyperv/netvsc/hv_net_vsc.h Fri Feb 5 05:50:53 2016 (r295306) @@ -1023,6 +1023,7 @@ typedef struct hn_softc { int hn_txdesc_avail; int hn_txeof; + int hn_sched_tx; int hn_direct_tx_size; struct taskqueue *hn_tx_taskq; struct task hn_start_task; Modified: head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c ============================================================================== --- head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Fri Feb 5 05:44:31 2016 (r295305) +++ head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Fri Feb 5 05:50:53 2016 (r295306) @@ -534,6 +534,10 @@ netvsc_attach(device_t dev) SYSCTL_ADD_INT(ctx, child, OID_AUTO, "direct_tx_size", CTLFLAG_RW, &sc->hn_direct_tx_size, 0, "Size of the packet for direct transmission"); + SYSCTL_ADD_INT(ctx, child, OID_AUTO, "sched_tx", + CTLFLAG_RW, &sc->hn_sched_tx, 0, + "Always schedule transmission " + "instead of doing direct transmission"); if (unit == 0) { struct sysctl_ctx_list *dc_ctx; @@ -1602,9 +1606,11 @@ hn_stop(hn_softc_t *sc) static void hn_start(struct ifnet *ifp) { - hn_softc_t *sc; + struct hn_softc *sc = ifp->if_softc; + + if (sc->hn_sched_tx) + goto do_sched; - sc = ifp->if_softc; if (NV_TRYLOCK(sc)) { int sched; @@ -1613,15 +1619,18 @@ hn_start(struct ifnet *ifp) if (!sched) return; } +do_sched: taskqueue_enqueue_fast(sc->hn_tx_taskq, &sc->hn_start_task); } static void hn_start_txeof(struct ifnet *ifp) { - hn_softc_t *sc; + struct hn_softc *sc = ifp->if_softc; + + if (sc->hn_sched_tx) + goto do_sched; - sc = ifp->if_softc; if (NV_TRYLOCK(sc)) { int sched; @@ -1633,6 +1642,7 @@ hn_start_txeof(struct ifnet *ifp) &sc->hn_start_task); } } else { +do_sched: /* * Release the OACTIVE earlier, with the hope, that * others could catch up. The task will clear the _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
