From: "Xu, Qian Q" <qian.q.xu@intel.com>
To: Yuanhan Liu <yuanhan.liu@linux.intel.com>, "dev@dpdk.org" <dev@dpdk.org>
Cc: Maxime Coquelin <maxime.coquelin@redhat.com>
Subject: Re: [dpdk-dev] [PATCH 5/6] vhost: add a flag to enable Tx zero copy
Date: Tue, 6 Sep 2016 09:00:14 +0000 [thread overview]
Message-ID: <82F45D86ADE5454A95A89742C8D1410E3912C500@shsmsx102.ccr.corp.intel.com> (raw)
In-Reply-To: <1471939839-29778-6-git-send-email-yuanhan.liu@linux.intel.com>
Just curious about the naming: vhost USER TX Zero copy. In fact, it's Vhost RX zero-copy
For virtio, it's Virtio TX zero-copy. So, I wonder why we call it as Vhost TX ZERO-COPY,
Any comments?
-----Original Message-----
From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Yuanhan Liu
Sent: Tuesday, August 23, 2016 4:11 PM
To: dev@dpdk.org
Cc: Maxime Coquelin; Yuanhan Liu
Subject: [dpdk-dev] [PATCH 5/6] vhost: add a flag to enable Tx zero copy
Add a new flag ``RTE_VHOST_USER_TX_ZERO_COPY`` to explictily enable
Tx zero copy. If not given, Tx zero copy is disabled by default.
Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
---
doc/guides/prog_guide/vhost_lib.rst | 7 ++++++-
lib/librte_vhost/rte_virtio_net.h | 1 +
lib/librte_vhost/socket.c | 5 +++++
lib/librte_vhost/vhost.c | 10 ++++++++++
lib/librte_vhost/vhost.h | 1 +
5 files changed, 23 insertions(+), 1 deletion(-)
diff --git a/doc/guides/prog_guide/vhost_lib.rst b/doc/guides/prog_guide/vhost_lib.rst
index 6b0c6b2..15c2bf7 100644
--- a/doc/guides/prog_guide/vhost_lib.rst
+++ b/doc/guides/prog_guide/vhost_lib.rst
@@ -79,7 +79,7 @@ The following is an overview of the Vhost API functions:
``/dev/path`` character device file will be created. For vhost-user server
mode, a Unix domain socket file ``path`` will be created.
- Currently two flags are supported (these are valid for vhost-user only):
+ Currently supported flags are (these are valid for vhost-user only):
- ``RTE_VHOST_USER_CLIENT``
@@ -97,6 +97,11 @@ The following is an overview of the Vhost API functions:
This reconnect option is enabled by default. However, it can be turned off
by setting this flag.
+ - ``RTE_VHOST_USER_TX_ZERO_COPY``
+
+ Tx zero copy will be enabled when this flag is set. It is disabled by
+ default.
+
* ``rte_vhost_driver_session_start()``
This function starts the vhost session loop to handle vhost messages. It
diff --git a/lib/librte_vhost/rte_virtio_net.h b/lib/librte_vhost/rte_virtio_net.h
index 9caa622..5e437c6 100644
--- a/lib/librte_vhost/rte_virtio_net.h
+++ b/lib/librte_vhost/rte_virtio_net.h
@@ -53,6 +53,7 @@
#define RTE_VHOST_USER_CLIENT (1ULL << 0)
#define RTE_VHOST_USER_NO_RECONNECT (1ULL << 1)
+#define RTE_VHOST_USER_TX_ZERO_COPY (1ULL << 2)
/* Enum for virtqueue management. */
enum {VIRTIO_RXQ, VIRTIO_TXQ, VIRTIO_QNUM};
diff --git a/lib/librte_vhost/socket.c b/lib/librte_vhost/socket.c
index bf03f84..5c3962d 100644
--- a/lib/librte_vhost/socket.c
+++ b/lib/librte_vhost/socket.c
@@ -62,6 +62,7 @@ struct vhost_user_socket {
int connfd;
bool is_server;
bool reconnect;
+ bool tx_zero_copy;
};
struct vhost_user_connection {
@@ -203,6 +204,9 @@ vhost_user_add_connection(int fd, struct vhost_user_socket *vsocket)
size = strnlen(vsocket->path, PATH_MAX);
vhost_set_ifname(vid, vsocket->path, size);
+ if (vsocket->tx_zero_copy)
+ vhost_enable_tx_zero_copy(vid);
+
RTE_LOG(INFO, VHOST_CONFIG, "new device, handle is %d\n", vid);
vsocket->connfd = fd;
@@ -499,6 +503,7 @@ rte_vhost_driver_register(const char *path, uint64_t flags)
memset(vsocket, 0, sizeof(struct vhost_user_socket));
vsocket->path = strdup(path);
vsocket->connfd = -1;
+ vsocket->tx_zero_copy = flags & RTE_VHOST_USER_TX_ZERO_COPY;
if ((flags & RTE_VHOST_USER_CLIENT) != 0) {
vsocket->reconnect = !(flags & RTE_VHOST_USER_NO_RECONNECT);
diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c
index ab25649..5461e5b 100644
--- a/lib/librte_vhost/vhost.c
+++ b/lib/librte_vhost/vhost.c
@@ -290,6 +290,16 @@ vhost_set_ifname(int vid, const char *if_name, unsigned int if_len)
dev->ifname[sizeof(dev->ifname) - 1] = '\0';
}
+void
+vhost_enable_tx_zero_copy(int vid)
+{
+ struct virtio_net *dev = get_device(vid);
+
+ if (dev == NULL)
+ return;
+
+ dev->tx_zero_copy = 1;
+}
int
rte_vhost_get_numa_node(int vid)
diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
index 718133e..3081180 100644
--- a/lib/librte_vhost/vhost.h
+++ b/lib/librte_vhost/vhost.h
@@ -279,6 +279,7 @@ void vhost_destroy_device(int);
int alloc_vring_queue_pair(struct virtio_net *dev, uint32_t qp_idx);
void vhost_set_ifname(int, const char *if_name, unsigned int if_len);
+void vhost_enable_tx_zero_copy(int vid);
/*
* Backend-specific cleanup. Defined by vhost-cuse and vhost-user.
--
1.9.0
next prev parent reply other threads:[~2016-09-06 9:00 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-23 8:10 [dpdk-dev] [PATCH 0/6] vhost: add Tx zero copy support Yuanhan Liu
2016-08-23 8:10 ` [dpdk-dev] [PATCH 1/6] vhost: simplify memory regions handling Yuanhan Liu
2016-08-23 9:17 ` Maxime Coquelin
2016-08-24 7:26 ` Xu, Qian Q
2016-08-24 7:40 ` Yuanhan Liu
2016-08-24 7:36 ` Xu, Qian Q
2016-08-23 8:10 ` [dpdk-dev] [PATCH 2/6] vhost: get guest/host physical address mappings Yuanhan Liu
2016-08-23 9:58 ` Maxime Coquelin
2016-08-23 12:32 ` Yuanhan Liu
2016-08-23 13:25 ` Maxime Coquelin
2016-08-23 13:49 ` Yuanhan Liu
2016-08-23 14:05 ` Maxime Coquelin
2016-08-23 8:10 ` [dpdk-dev] [PATCH 3/6] vhost: introduce last avail idx for Tx Yuanhan Liu
2016-08-23 12:27 ` Maxime Coquelin
2016-08-23 8:10 ` [dpdk-dev] [PATCH 4/6] vhost: add Tx zero copy Yuanhan Liu
2016-08-23 14:04 ` Maxime Coquelin
2016-08-23 14:31 ` Yuanhan Liu
2016-08-23 15:40 ` Maxime Coquelin
2016-08-23 8:10 ` [dpdk-dev] [PATCH 5/6] vhost: add a flag to enable " Yuanhan Liu
2016-09-06 9:00 ` Xu, Qian Q [this message]
2016-09-06 9:42 ` Xu, Qian Q
2016-09-06 10:02 ` Yuanhan Liu
2016-09-07 2:43 ` Xu, Qian Q
2016-09-06 9:55 ` Yuanhan Liu
2016-09-07 16:00 ` Thomas Monjalon
2016-09-08 7:21 ` Yuanhan Liu
2016-09-08 7:57 ` Thomas Monjalon
2016-08-23 8:10 ` [dpdk-dev] [PATCH 6/6] examples/vhost: add an option " Yuanhan Liu
2016-08-23 9:31 ` Thomas Monjalon
2016-08-23 12:33 ` Yuanhan Liu
2016-08-23 14:14 ` Maxime Coquelin
2016-08-23 14:45 ` Yuanhan Liu
2016-08-23 14:18 ` [dpdk-dev] [PATCH 0/6] vhost: add Tx zero copy support Maxime Coquelin
2016-08-23 14:42 ` Yuanhan Liu
2016-08-23 14:53 ` Yuanhan Liu
2016-08-23 16:41 ` Maxime Coquelin
2016-08-29 8:32 ` Xu, Qian Q
2016-08-29 8:57 ` Xu, Qian Q
2016-09-23 4:11 ` Yuanhan Liu
2016-10-09 15:20 ` Yuanhan Liu
2016-09-23 4:13 ` [dpdk-dev] [PATCH v2 0/7] vhost: add dequeue " Yuanhan Liu
2016-09-23 4:13 ` [dpdk-dev] [PATCH v2 1/7] vhost: simplify memory regions handling Yuanhan Liu
2016-09-23 4:13 ` [dpdk-dev] [PATCH v2 2/7] vhost: get guest/host physical address mappings Yuanhan Liu
2016-09-26 20:17 ` Maxime Coquelin
2016-09-23 4:13 ` [dpdk-dev] [PATCH v2 3/7] vhost: introduce last avail idx for dequeue Yuanhan Liu
2016-09-23 4:13 ` [dpdk-dev] [PATCH v2 4/7] vhost: add dequeue zero copy Yuanhan Liu
2016-09-26 20:45 ` Maxime Coquelin
2016-10-06 14:37 ` Xu, Qian Q
2016-10-09 2:03 ` Yuanhan Liu
2016-10-10 10:12 ` Xu, Qian Q
2016-10-10 10:14 ` Maxime Coquelin
2016-10-10 10:22 ` Xu, Qian Q
2016-10-10 10:40 ` Xu, Qian Q
2016-10-10 11:48 ` Maxime Coquelin
2016-09-23 4:13 ` [dpdk-dev] [PATCH v2 5/7] vhost: add a flag to enable " Yuanhan Liu
2016-09-26 20:57 ` Maxime Coquelin
2016-09-23 4:13 ` [dpdk-dev] [PATCH v2 6/7] examples/vhost: add an option " Yuanhan Liu
2016-09-26 21:05 ` Maxime Coquelin
2016-09-23 4:13 ` [dpdk-dev] [PATCH v2 7/7] net/vhost: " Yuanhan Liu
2016-09-26 21:05 ` Maxime Coquelin
2016-10-09 7:27 ` [dpdk-dev] [PATCH v3 0/7] vhost: add dequeue zero copy support Yuanhan Liu
2016-10-09 7:27 ` [dpdk-dev] [PATCH v3 1/7] vhost: simplify memory regions handling Yuanhan Liu
2016-10-09 7:27 ` [dpdk-dev] [PATCH v3 2/7] vhost: get guest/host physical address mappings Yuanhan Liu
2016-11-29 3:10 ` linhaifeng
2016-11-29 13:14 ` linhaifeng
2016-10-09 7:27 ` [dpdk-dev] [PATCH v3 3/7] vhost: introduce last avail idx for dequeue Yuanhan Liu
2016-10-09 7:27 ` [dpdk-dev] [PATCH v3 4/7] vhost: add dequeue zero copy Yuanhan Liu
2016-10-09 7:27 ` [dpdk-dev] [PATCH v3 5/7] vhost: add a flag to enable " Yuanhan Liu
2016-10-09 7:27 ` [dpdk-dev] [PATCH v3 6/7] examples/vhost: add an option " Yuanhan Liu
2016-10-09 7:28 ` [dpdk-dev] [PATCH v3 7/7] net/vhost: " Yuanhan Liu
2016-10-11 13:04 ` [dpdk-dev] [PATCH v3 0/7] vhost: add dequeue zero copy support Xu, Qian Q
2016-10-12 7:48 ` Yuanhan Liu
2016-10-09 10:46 ` [dpdk-dev] [PATCH 0/6] vhost: add Tx " linhaifeng
2016-10-10 8:03 ` Yuanhan Liu
2016-10-14 7:30 ` linhaifeng
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