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-rw-r--r--src/vnet/devices/virtio/vhost_user.c95
-rw-r--r--src/vnet/devices/virtio/vhost_user.h8
-rw-r--r--src/vnet/devices/virtio/vhost_user_output.c52
3 files changed, 67 insertions, 88 deletions
diff --git a/src/vnet/devices/virtio/vhost_user.c b/src/vnet/devices/virtio/vhost_user.c
index 7ea7cbef995..089e08aabb4 100644
--- a/src/vnet/devices/virtio/vhost_user.c
+++ b/src/vnet/devices/virtio/vhost_user.c
@@ -37,6 +37,7 @@
#include <vnet/devices/devices.h>
#include <vnet/feature/feature.h>
#include <vnet/interface/rx_queue_funcs.h>
+#include <vnet/interface/tx_queue_funcs.h>
#include <vnet/devices/virtio/vhost_user.h>
#include <vnet/devices/virtio/vhost_user_inline.h>
@@ -116,40 +117,45 @@ unmap_all_mem_regions (vhost_user_intf_t * vui)
}
static_always_inline void
-vhost_user_tx_thread_placement (vhost_user_intf_t * vui)
+vhost_user_tx_thread_placement (vhost_user_intf_t *vui, u32 qid)
{
- //Let's try to assign one queue to each thread
- u32 qid;
- u32 thread_index = 0;
+ vnet_main_t *vnm = vnet_get_main ();
+ vhost_user_vring_t *rxvq = &vui->vrings[qid];
+ u32 q = qid >> 1, rxvq_count;
- vui->use_tx_spinlock = 0;
- while (1)
+ ASSERT ((qid & 1) == 0);
+ if (!rxvq->started || !rxvq->enabled)
+ return;
+
+ rxvq_count = (qid >> 1) + 1;
+ if (rxvq->queue_index == ~0)
{
- for (qid = 0; qid < vui->num_qid / 2; qid++)
- {
- vhost_user_vring_t *rxvq = &vui->vrings[VHOST_VRING_IDX_RX (qid)];
- if (!rxvq->started || !rxvq->enabled)
- continue;
-
- vui->per_cpu_tx_qid[thread_index] = qid;
- thread_index++;
- if (thread_index == vlib_get_thread_main ()->n_vlib_mains)
- return;
- }
- //We need to loop, meaning the spinlock has to be used
- vui->use_tx_spinlock = 1;
- if (thread_index == 0)
- {
- //Could not find a single valid one
- for (thread_index = 0;
- thread_index < vlib_get_thread_main ()->n_vlib_mains;
- thread_index++)
- {
- vui->per_cpu_tx_qid[thread_index] = 0;
- }
- return;
- }
+ rxvq->queue_index =
+ vnet_hw_if_register_tx_queue (vnm, vui->hw_if_index, q);
+ rxvq->qid = q;
+ }
+
+ FOR_ALL_VHOST_RXQ (q, vui)
+ {
+ vhost_user_vring_t *rxvq = &vui->vrings[q];
+ u32 qi = rxvq->queue_index;
+
+ if (rxvq->queue_index == ~0)
+ break;
+ for (u32 i = 0; i < vlib_get_n_threads (); i++)
+ vnet_hw_if_tx_queue_unassign_thread (vnm, qi, i);
+ }
+
+ for (u32 i = 0; i < vlib_get_n_threads (); i++)
+ {
+ vhost_user_vring_t *rxvq =
+ &vui->vrings[VHOST_VRING_IDX_RX (i % rxvq_count)];
+ u32 qi = rxvq->queue_index;
+
+ vnet_hw_if_tx_queue_assign_thread (vnm, qi, i);
}
+
+ vnet_hw_if_update_runtime_data (vnm, vui->hw_if_index);
}
/**
@@ -243,7 +249,7 @@ vhost_user_thread_placement (vhost_user_intf_t * vui, u32 qid)
vhost_user_rx_thread_placement (vui, qid);
}
else
- vhost_user_tx_thread_placement (vui);
+ vhost_user_tx_thread_placement (vui, qid);
}
static clib_error_t *
@@ -1657,10 +1663,6 @@ vhost_user_vui_init (vnet_main_t * vnm, vhost_user_intf_t * vui,
if (sw_if_index)
*sw_if_index = vui->sw_if_index;
-
- vec_validate (vui->per_cpu_tx_qid,
- vlib_get_thread_main ()->n_vlib_mains - 1);
- vhost_user_tx_thread_placement (vui);
}
int
@@ -2130,7 +2132,6 @@ show_vhost_user_command_fn (vlib_main_t * vm,
u32 hw_if_index, *hw_if_indices = 0;
vnet_hw_interface_t *hi;
u16 qid;
- u32 ci;
int i, j, q;
int show_descr = 0;
int show_verbose = 0;
@@ -2263,13 +2264,20 @@ show_vhost_user_command_fn (vlib_main_t * vm,
txvq->mode);
}
- vlib_cli_output (vm, " tx placement: %s\n",
- vui->use_tx_spinlock ? "spin-lock" : "lock-free");
+ vlib_cli_output (vm, " tx placement\n");
- vec_foreach_index (ci, vui->per_cpu_tx_qid)
+ FOR_ALL_VHOST_RXQ (qid, vui)
{
- vlib_cli_output (vm, " thread %d on vring %d\n", ci,
- VHOST_VRING_IDX_RX (vui->per_cpu_tx_qid[ci]));
+ vhost_user_vring_t *rxvq = &vui->vrings[qid];
+ vnet_hw_if_tx_queue_t *txq;
+
+ if (rxvq->queue_index == ~0)
+ continue;
+ txq = vnet_hw_if_get_tx_queue (vnm, rxvq->queue_index);
+ if (txq->threads)
+ vlib_cli_output (vm, " threads %U on vring %u: %s\n",
+ format_bitmap_list, txq->threads, qid,
+ txq->shared_queue ? "spin-lock" : "lock-free");
}
vlib_cli_output (vm, "\n");
@@ -2302,9 +2310,8 @@ show_vhost_user_command_fn (vlib_main_t * vm,
vlib_cli_output (vm, "\n Virtqueue %d (%s%s)\n", q,
(q & 1) ? "RX" : "TX",
vui->vrings[q].enabled ? "" : " disabled");
- if (q & 1)
- vlib_cli_output (vm, " global RX queue index %u\n",
- vui->vrings[q].queue_index);
+ vlib_cli_output (vm, " global %s queue index %u\n",
+ (q & 1) ? "RX" : "TX", vui->vrings[q].queue_index);
vlib_cli_output (
vm,
diff --git a/src/vnet/devices/virtio/vhost_user.h b/src/vnet/devices/virtio/vhost_user.h
index 8ecf4a3aca7..59db5b4c592 100644
--- a/src/vnet/devices/virtio/vhost_user.h
+++ b/src/vnet/devices/virtio/vhost_user.h
@@ -30,8 +30,8 @@
* The max number for q pair is naturally 128.
*/
#define VHOST_VRING_MAX_MQ_PAIR_SZ 128
-#define VHOST_VRING_IDX_RX(qid) (2*qid)
-#define VHOST_VRING_IDX_TX(qid) (2*qid + 1)
+#define VHOST_VRING_IDX_RX(qid) (2 * (qid))
+#define VHOST_VRING_IDX_TX(qid) (2 * (qid) + 1)
#define VHOST_USER_VRING_NOFD_MASK 0x100
@@ -279,10 +279,6 @@ typedef struct
void *log_base_addr;
u64 log_size;
- /* Whether to use spinlock or per_cpu_tx_qid assignment */
- u8 use_tx_spinlock;
- u16 *per_cpu_tx_qid;
-
u8 enable_gso;
/* Packed ring configured */
diff --git a/src/vnet/devices/virtio/vhost_user_output.c b/src/vnet/devices/virtio/vhost_user_output.c
index d3e38bfa04e..4efafa85333 100644
--- a/src/vnet/devices/virtio/vhost_user_output.c
+++ b/src/vnet/devices/virtio/vhost_user_output.c
@@ -118,24 +118,6 @@ vhost_user_name_renumber (vnet_hw_interface_t * hi, u32 new_dev_instance)
return 0;
}
-/**
- * @brief Spin until the vring is successfully locked
- */
-static_always_inline void
-vhost_user_vring_lock (vhost_user_intf_t * vui, u32 qid)
-{
- clib_spinlock_lock_if_init (&vui->vrings[qid].vring_lock);
-}
-
-/**
- * @brief Unlock the vring lock
- */
-static_always_inline void
-vhost_user_vring_unlock (vhost_user_intf_t * vui, u32 qid)
-{
- clib_spinlock_unlock_if_init (&vui->vrings[qid].vring_lock);
-}
-
static_always_inline void
vhost_user_tx_trace (vhost_trace_t * t,
vhost_user_intf_t * vui, u16 qid,
@@ -377,17 +359,14 @@ vhost_user_tx_trace_packed (vhost_trace_t * t, vhost_user_intf_t * vui,
}
static_always_inline uword
-vhost_user_device_class_packed (vlib_main_t * vm, vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+vhost_user_device_class_packed (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_frame_t *frame, vhost_user_intf_t *vui,
+ vhost_user_vring_t *rxvq)
{
u32 *buffers = vlib_frame_vector_args (frame);
u32 n_left = frame->n_vectors;
vhost_user_main_t *vum = &vhost_user_main;
- vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
- vhost_user_intf_t *vui =
- pool_elt_at_index (vum->vhost_user_interfaces, rd->dev_instance);
- u32 qid;
- vhost_user_vring_t *rxvq;
+ u32 qid = rxvq->qid;
u8 error;
u32 thread_index = vm->thread_index;
vhost_cpu_t *cpu = &vum->cpus[thread_index];
@@ -401,10 +380,6 @@ vhost_user_device_class_packed (vlib_main_t * vm, vlib_node_runtime_t * node,
u16 n_descs_processed;
u8 indirect, chained;
- qid = VHOST_VRING_IDX_RX (*vec_elt_at_index (vui->per_cpu_tx_qid,
- thread_index));
- rxvq = &vui->vrings[qid];
-
retry:
error = VHOST_USER_TX_FUNC_ERROR_NONE;
tx_headers_len = 0;
@@ -682,7 +657,7 @@ done:
goto retry;
}
- vhost_user_vring_unlock (vui, qid);
+ clib_spinlock_unlock (&rxvq->vring_lock);
if (PREDICT_FALSE (n_left && error != VHOST_USER_TX_FUNC_ERROR_NONE))
{
@@ -706,7 +681,7 @@ VNET_DEVICE_CLASS_TX_FN (vhost_user_device_class) (vlib_main_t * vm,
vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
vhost_user_intf_t *vui =
pool_elt_at_index (vum->vhost_user_interfaces, rd->dev_instance);
- u32 qid = ~0;
+ u32 qid;
vhost_user_vring_t *rxvq;
u8 error;
u32 thread_index = vm->thread_index;
@@ -716,6 +691,7 @@ VNET_DEVICE_CLASS_TX_FN (vhost_user_device_class) (vlib_main_t * vm,
u16 copy_len;
u16 tx_headers_len;
u32 or_flags;
+ vnet_hw_if_tx_frame_t *tf = vlib_frame_scalar_args (frame);
if (PREDICT_FALSE (!vui->admin_up))
{
@@ -729,20 +705,20 @@ VNET_DEVICE_CLASS_TX_FN (vhost_user_device_class) (vlib_main_t * vm,
goto done3;
}
- qid = VHOST_VRING_IDX_RX (*vec_elt_at_index (vui->per_cpu_tx_qid,
- thread_index));
+ qid = VHOST_VRING_IDX_RX (tf->queue_id);
rxvq = &vui->vrings[qid];
+ ASSERT (tf->queue_id == rxvq->qid);
+
if (PREDICT_FALSE (rxvq->avail == 0))
{
error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
goto done3;
}
-
- if (PREDICT_FALSE (vui->use_tx_spinlock))
- vhost_user_vring_lock (vui, qid);
+ if (tf->shared_queue)
+ clib_spinlock_lock (&rxvq->vring_lock);
if (vhost_user_is_packed_ring_supported (vui))
- return (vhost_user_device_class_packed (vm, node, frame));
+ return (vhost_user_device_class_packed (vm, node, frame, vui, rxvq));
retry:
error = VHOST_USER_TX_FUNC_ERROR_NONE;
@@ -1020,7 +996,7 @@ done:
vhost_user_send_call (vm, vui, rxvq);
}
- vhost_user_vring_unlock (vui, qid);
+ clib_spinlock_unlock (&rxvq->vring_lock);
done3:
if (PREDICT_FALSE (n_left && error != VHOST_USER_TX_FUNC_ERROR_NONE))