diff options
Diffstat (limited to 'src/plugins/vmxnet3/output.c')
| -rw-r--r-- | src/plugins/vmxnet3/output.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/plugins/vmxnet3/output.c b/src/plugins/vmxnet3/output.c index c80ad0706cc..2886c31edf7 100644 --- a/src/plugins/vmxnet3/output.c +++ b/src/plugins/vmxnet3/output.c @@ -109,7 +109,7 @@ VNET_DEVICE_CLASS_TX_FN (vmxnet3_device_class) (vlib_main_t * vm, u16 n_left = frame->n_vectors; vmxnet3_txq_t *txq; u32 thread_index = vm->thread_index; - u16 qid = thread_index; + u16 qid = thread_index, produce; if (PREDICT_FALSE (!(vd->flags & VMXNET3_DEVICE_F_LINK_UP))) { @@ -124,7 +124,8 @@ VNET_DEVICE_CLASS_TX_FN (vmxnet3_device_class) (vlib_main_t * vm, vmxnet3_txq_release (vm, vd, txq); - while (n_left) + produce = txq->tx_ring.produce; + while (PREDICT_TRUE (n_left)) { u16 space_needed = 1, i; vlib_buffer_t *b; @@ -195,13 +196,15 @@ VNET_DEVICE_CLASS_TX_FN (vmxnet3_device_class) (vlib_main_t * vm, * Device can start reading the packet */ txq->tx_desc[first_idx].flags[0] ^= VMXNET3_TXF_GEN; - vmxnet3_reg_write_inline (vd, 0, VMXNET3_REG_TXPROD, - txq->tx_ring.produce); buffers++; n_left--; } + if (PREDICT_TRUE (produce != txq->tx_ring.produce)) + vmxnet3_reg_write_inline (vd, 0, VMXNET3_REG_TXPROD, + txq->tx_ring.produce); + clib_spinlock_unlock_if_init (&txq->lock); return (frame->n_vectors - n_left); |