Hi.
When I execute the 'ovs-dpctl show' command, I got:
```
$ ovs-dpctl show
system@ovs-system:
lookups: hit:37994604 missed:218759 lost:0
flows: 5
masks: hit:39862430 total:5 hit/pkt:1.04
port 0: ovs-system (internal)
port 1: vbr0 (internal)
port 2: gre_sys (gre)
port 3: net2
```
I retrieved some explanations:
```
[-s | --statistics] show [dp...]
Prints a summary of configured datapaths, including their data‐
path 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" dis‐
plays the number of packets not matching any existing flow and
require user space processing. "lost" displays number of pack‐
ets destined for user space process but subsequently dropped be‐
fore reaching userspace. The sum of "hit" and "miss" equals to
the total number of packets datapath processed.
The "flows" row displays the number of flows in datapath.
The "masks" row displays the mega flow mask stats. This row is
omitted for datapath not implementing mega flow. "hit" displays
the total number of masks visited for matching incoming packets.
"total" displays number of masks in the datapath. "hit/pkt" dis‐
plays the average number of masks visited per packet; the ratio
between "hit" and total number of packets processed by the data‐
path.
If one or more datapaths are specified, information on only
those datapaths are displayed. Otherwise, ovs-dpctl displays
information about all configured datapaths.
```
But I still have some questions:
1. Is the total number of incoming packets equal to (lookups.hit +
lookups.missed)?
2. If the total number of incoming packets is equal to
(lookups.hit + lookups.missed), why is the value of masks.hit:39862430
greater than (lookups.hit:37994604 + lookups.missed:218759)?
3. Why is the masks.hit/pkt ratio greater than 1? What is the reasonable
value in what interval?
Thank you.
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