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| author | Alexander Motin <mav@FreeBSD.org> | 2015-04-20 10:29:42 +0000 |
|---|---|---|
| committer | Alexander Motin <mav@FreeBSD.org> | 2015-04-20 10:29:42 +0000 |
| commit | d9a6698393395f76a197b42a5a91c54616fd9d92 (patch) | |
| tree | a40f877b211983a54dcf32db1a14fad5c1669adb /usr.sbin | |
| parent | a22fc066368bde67aae81cfc490c2521f677fc4b (diff) | |
| download | src-d9a6698393395f76a197b42a5a91c54616fd9d92.tar.gz src-d9a6698393395f76a197b42a5a91c54616fd9d92.zip | |
Disable RX/TX queues notifications when not needed.
This reduces CPU load and doubles iperf throughput, reaching 2-3Gbit/s.
MFC after: 2 weeks
Sponsored by: iXsystems, Inc.
Notes
Notes:
svn path=/head/; revision=281764
Diffstat (limited to 'usr.sbin')
| -rw-r--r-- | usr.sbin/bhyve/pci_virtio_net.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/usr.sbin/bhyve/pci_virtio_net.c b/usr.sbin/bhyve/pci_virtio_net.c index 457a4057e35d..e6a5576cf555 100644 --- a/usr.sbin/bhyve/pci_virtio_net.c +++ b/usr.sbin/bhyve/pci_virtio_net.c @@ -393,6 +393,7 @@ pci_vtnet_ping_rxq(void *vsc, struct vqueue_info *vq) */ if (sc->vsc_rx_ready == 0) { sc->vsc_rx_ready = 1; + vq->vq_used->vu_flags |= VRING_USED_F_NO_NOTIFY; } } @@ -438,6 +439,7 @@ pci_vtnet_ping_txq(void *vsc, struct vqueue_info *vq) /* Signal the tx thread for processing */ pthread_mutex_lock(&sc->tx_mtx); + vq->vq_used->vu_flags |= VRING_USED_F_NO_NOTIFY; if (sc->tx_in_progress == 0) pthread_cond_signal(&sc->tx_cond); pthread_mutex_unlock(&sc->tx_mtx); @@ -466,6 +468,7 @@ pci_vtnet_tx_thread(void *param) for (;;) { /* note - tx mutex is locked here */ do { + vq->vq_used->vu_flags &= ~VRING_USED_F_NO_NOTIFY; if (sc->resetting) have_work = 0; else @@ -478,6 +481,7 @@ pci_vtnet_tx_thread(void *param) assert(error == 0); } } while (!have_work); + vq->vq_used->vu_flags |= VRING_USED_F_NO_NOTIFY; sc->tx_in_progress = 1; pthread_mutex_unlock(&sc->tx_mtx); |