[ovs-discuss] branch-2.3: rx/tx counter overflow

Andrey Korolyov andrey at xdel.ru
Mon Oct 27 16:15:37 UTC 2014


On Mon, Oct 27, 2014 at 7:15 PM, Ben Pfaff <blp at nicira.com> wrote:
> On Mon, Oct 27, 2014 at 08:12:28PM +0400, Andrey Korolyov wrote:
>> On Mon, Oct 27, 2014 at 7:09 PM, Ben Pfaff <blp at nicira.com> wrote:
>> > On Mon, Oct 27, 2014 at 08:05:01PM +0400, Andrey Korolyov wrote:
>> >> On Mon, Oct 27, 2014 at 7:04 PM, Ben Pfaff <blp at nicira.com> wrote:
>> >> > On Mon, Oct 27, 2014 at 07:55:01PM +0400, Andrey Korolyov wrote:
>> >> >> ovs-ofctl dump-ports currently reporting values not large than u32 in
>> >> >> the mentioned branch. lib/ofp-util.c has no regressions at a glance,
>> >> >> probably truncation going in the different (not so obvious) way.
>> >> >
>> >> > Are you using a 64-bit kernel?  There is some unavoidable truncation
>> >> > with 32-bit kernels.
>> >>
>> >> Yes, of course.
>> >
>> > Thanks.  I guess you must have previously seen 64-bit values with some
>> > earlier version.  Do you know what the most recent version was?
>>
>> For 0fe1d7f39de9836fea01c560a6fdbfd1405096ea it is clearly positive
>> that it reports 64-bit counter values (branch-2.1). Had not tested
>> against other revisions yet. Are you suggesting that the counter
>> behavior with 32b limit is currently taken as a right one?
>
> I am trying to narrow down the range of commits that could have caused
> the problem.  "git bisect" would be the ideal way to do it, if you are
> willing and able to try it.

Heh, okay. I`m signing over bisection, please give me some time :)



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