Reading Direct Counter Value

[johnhauhnar]

Hi,
I was trying out this tutorial specifically the one explained in "EXERCISE-1.md"
I was able to send ping packet between the hosts after programming the table entries from P4 Runtime shell.

Then I tried reading the counter values, but I could not seem to do so..
Can you quickly point me how to read the direct/in-direct counter from p4runtime shell?

Below is the logs of my attempt to read the counter values:

P4Runtime sh >>> direct_counters
acl_table_counter
l2_exact_table_counter
l2_ternary_table_counter
my_station_table_counter
ndp_reply_table_counter
routing_v6_table_counter

P4Runtime sh >>> direct_counters["acl_table_counter"]
Out[6]:
preamble {
id: 318773822
name: "acl_table_counter"
alias: "acl_table_counter"
}
spec {
unit: BOTH
}
direct_table_id: 33557865 ("IngressPipeImpl.acl_table")

P4Runtime sh >>> direct_counter_entry["acl_table_counter"]
Out[7]:
table_entry {
table_id: 33557865 ("IngressPipeImpl.acl_table")
}

P4Runtime sh >>> for dce in direct_counter_entry["acl_table_counter"].read:
...: print(dce)
...:

TypeError Traceback (most recent call last)
in
----> 1 for dce in direct_counter_entry["acl_table_counter"].read:
2 print(dce)
3

TypeError: 'method' object is not iterable

P4Runtime sh >>> dce = direct_counter_entry["acl_table_counter"].read()

P4Runtime sh >>> print dce
<p4runtime_sh.shell._EntityBase.read.._EntryIterator object at 0x7f66241b0208>

P4Runtime sh >>>

[Yi-Tseng]

Maybe you can try putting a lambda to the read function
direct_counter_entry["acl_table_counter"].read(lambda dce: print(dce))

[johnhauhnar]

Maybe you can try putting a lambda to the read function
direct_counter_entry["acl_table_counter"].read(lambda dce: print(dce))

Thanks for the suggestion..
I tried and below is what I got:-

P4Runtime sh >>> direct_counters
acl_table_counter
l2_exact_table_counter
l2_ternary_table_counter
my_station_table_counter
ndp_reply_table_counter
routing_v6_table_counter

P4Runtime sh >>> direct_counter_entry["acl_table_counter"].read(lambda dce: print(dce))

P4RuntimeException Traceback (most recent call last)
in
----> 1 direct_counter_entry["acl_table_counter"].read(lambda dce: print(dce))

/p4runtime-sh/p4runtime_sh/shell.py in read(self, function)
1821 .read(lambda c: print(c))
1822 """
-> 1823 return super().read(function)
1824
1825

/p4runtime-sh/p4runtime_sh/shell.py in read(self, function)
708 return _EntryIterator(self, iterator)
709 else:
--> 710 for x in _EntryIterator(self, iterator):
711 function(x)
712

/p4runtime-sh/p4runtime_sh/p4runtime.py in handle(*args, **kwargs)
132 return f(*args, **kwargs)
133 except grpc.RpcError as e:
--> 134 raise P4RuntimeException(e) from None
135 return handle
136

P4RuntimeException: P4Runtime RPC error (UNIMPLEMENTED):

P4Runtime sh >>>

[ccascone]

Closing as this is not related to this repo (ngsdn-tutorial). The feature seems to be UNIMPLEMENTED by the switch. If I remember well reading all direct counters for a given table is not supported by BMv2 and/or PI.