an ovs-vswitchd
(...)
DPIF-NETDEV COMMANDS
These commands are used to expose internal information (mostly statistics)
about the `dpif-netdev` userspace datapath. If there is only one datapath
(as is often the case, unless dpctl/ commands are used), the dp argument can
be omitted.
dpif-netdev/pmd-stats-show [dp]
Shows performance statistics for each pmd thread of the datapath dp.
The special thread ``main'' sums up the statistics of every non pmd
thread. The sum of ``emc hits'', ``masked hits'' and ``miss'' is the
number of packets received by the datapath. Cycles are counted using
the TSC or similar facilities when available on the platform. To
reset these counters use dpif-netdev/pmd-stats-clear. The duration of
one cycle depends on the measuring infrastructure.
(...)
Raw
man ovs-dpctl
(...)
dump-dps
Prints the name of each configured datapath on a separate line.
[-s | --statistics] show [dp...]
Prints a summary of configured datapaths, including their datapath numbers and a list of ports connected to each datapath. (The local port is
identified as port 0.) If -s or --statistics is specified, then packet and byte counters are also printed for each port.
The datapath numbers consists of flow stats and mega flow mask stats.
The "lookups" row displays three stats related to flow lookup triggered by processing incoming packets in the datapath. "hit" displays number
of packets matches existing flows. "missed" displays the number of packets not matching any existing flow and require user space processing.
"lost" displays number of packets destined for user space process but subsequently dropped before reaching userspace. The sum of "hit" and
"miss" equals to the total number of packets datapath processed.
(...)
Raw
man ovs-vswitchd
(...)
dpctl/show [-s | --statistics] [dp...]
Prints a summary of configured datapaths, including their datapath numbers and a list of ports connected to each datapath. (The local port is identified as
port 0.) If -s or --statistics is specified, then packet and byte counters are also printed for each port.
The datapath numbers consists of flow stats and mega flow mask stats.
The "lookups" row displays three stats related to flow lookup triggered by processing incoming packets in the datapath. "hit" displays number of packets
matches existing flows. "missed" displays the number of packets not matching any existing flow and require user space processing. "lost" displays number of
packets destined for user space process but subsequently dropped before reaching userspace. The sum of "hit" and "miss" equals to the total number of packets
datapath processed.
(...)
an ovs-vswitchd
(...)
DPIF-NETDEV COMMANDS
These commands are used to expose internal information (mostly statistics)
about the `dpif-netdev` userspace datapath. If there is only one datapath
(as is often the case, unless dpctl/ commands are used), the dp argument can
be omitted.
dpif-netdev/pmd-stats-show [dp]
Shows performance statistics for each pmd thread of the datapath dp.
The special thread ``main'' sums up the statistics of every non pmd
thread. The sum of ``emc hits'', ``masked hits'' and ``miss'' is the
number of packets received by the datapath. Cycles are counted using
the TSC or similar facilities when available on the platform. To
reset these counters use dpif-netdev/pmd-stats-clear. The duration of
one cycle depends on the measuring infrastructure.
(...)
Raw
man ovs-dpctl
(...)
dump-dps
Prints the name of each configured datapath on a separate line.
[-s | --statistics] show [dp...]
Prints a summary of configured datapaths, including their datapath numbers and a list of ports connected to each datapath. (The local port is
identified as port 0.) If -s or --statistics is specified, then packet and byte counters are also printed for each port.
The datapath numbers consists of flow stats and mega flow mask stats.
The "lookups" row displays three stats related to flow lookup triggered by processing incoming packets in the datapath. "hit" displays number
of packets matches existing flows. "missed" displays the number of packets not matching any existing flow and require user space processing.
"lost" displays number of packets destined for user space process but subsequently dropped before reaching userspace. The sum of "hit" and
"miss" equals to the total number of packets datapath processed.
(...)
Raw
man ovs-vswitchd
(...)
dpctl/show [-s | --statistics] [dp...]
Prints a summary of configured datapaths, including their datapath numbers and a list of ports connected to each datapath. (The local port is identified as
port 0.) If -s or --statistics is specified, then packet and byte counters are also printed for each port.
The datapath numbers consists of flow stats and mega flow mask stats.
The "lookups" row displays three stats related to flow lookup triggered by processing incoming packets in the datapath. "hit" displays number of packets
matches existing flows. "missed" displays the number of packets not matching any existing flow and require user space processing. "lost" displays number of
packets destined for user space process but subsequently dropped before reaching userspace. The sum of "hit" and "miss" equals to the total number of packets
datapath processed.
(...)
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注意
其中一些文档指的是内核数据路径，因此当它指出 用户空间处理时，意味着数据包不会被归类为内核 sw 缓存中（等同于 emc 和 dpcls）并将其发送到用户空间中的 proto 层。
红帽全球峰会
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