> For VPP 20.05 the following works to extract /sys/vector_rate
> statistics:
>
> #!/usr/bin/python3
> from vpp_papi.vpp_stats import VPPStats
> stat = VPPStats("/run/vpp/stats.sock")
> dir = stat.ls(['^/sys/vector_rate'])
> counters = stat.dump(dir)
> vector_rate=counters.get('/sys/vector_rate')
> print("vector_rate = ", vector_rate)
>
> Unfortunately, with VPP 20.09 the stat client crashes when doing that.
> Seems like a problem introduced by https://gerrit.fd.io/r/c/vpp/+/28017
> (stats: remove offsets on vpp side) and fixed in master by
> https://gerrit.fd.io/r/c/vpp/+/29569 (stats: missing dimension in
> stat_set_simple_counter).
>
> I was hoping this could be fixed by cherry-picking the fix into the
> stable/2009 branch which I tried here:
> https://gerrit.fd.io/r/c/vpp/+/30161
> However that does not pass the jenkins tests due to some problem
> related to "vom" which was recently deprecated in the master branch,
> that might explain why the fix works in master but not in stable/2009.
> Still, the fix does work for me in stable/2009, maybe different
> compiler version or other details matter and cause some of the jenkins
> builds to fail.
>
> How to get around this, to make the stat client work for stable/2009
> also?
/w/workspace/vpp-verify-2009-ubuntu1804-x86_64/build-root/install-vpp-native/vpp/include/vpp-api/client/stat_client.h:107:11:
error: pointer of type ‘void *’ used in arithmetic [-Werror=pointer-arith]
((p + sizeof (p)) < ((void *) sm->shared_header + sm->memory_size)))
~~^~~~~~~~~~
Doing pointer arithmetic on an incomplete type (void) isn't entirely kosher.
GCC supports it, and you could disable the warning.
But the correct-est approach would be to cast it to a type with size 1.
(and fix that in master too).
Cheers,
Ole
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