[Mini-NDN] [EXT]Re: Problems measuring elapsed time in MiniNDN experiment

[Junxiao Shi]

Hi Saurab

When the face has more than one Interest, the blocking time of
face.processEvents() would be higher than RTT of a particular Interest.
This doesn't explain why OP is seeing 1ms blocking time, while RTT is
supposed to be at least 2ms.

My guess is that the consumer is getting either cached Data or Nacks from
the local forwarder.

Yours, Junxiao

On Wed, Sep 9, 2020, 15:41 Saurab Dulal (sdulal) <sdulal at memphis.edu> wrote:

> *External Email*
> Yes, that's what I am suspecting too. If there are several interest, then
> the final diff time will be the aggregated time from beginning till the
> final schedule. This can incur a false/high number than expected if the
> computation is for per interest.
>
> Saurab,
> ------------------------------
> *From:* Junxiao Shi <shijunxiao at email.arizona.edu>
> *Sent:* Wednesday, September 9, 2020 2:32 PM
> *To:* Saurab Dulal (sdulal) <sdulal at memphis.edu>
> *Cc:* Anurag Muttur via Mini-NDN <mini-ndn at lists.cs.ucla.edu>
> *Subject:* Re: [EXT]Re: [Mini-NDN] Problems measuring elapsed time in
> MiniNDN experiment
>
> Hi Saurab
>
> I think OP is recording the end time after face.processEvents() returns.
> This is unusual but valid according to API: face.processEvents() should
> block until there’s nothing scheduled on the asio::io_context. This means,
> suppose this is the only Interest on the face, face.processEvent() should
> return when the Interest is either satisfied or expired.
>
> I don’t know what’s causing the problem though.
>
> Yours, Junxiao
>
>
>
>
> Everything seems to work fine, with nodes receiving and sending data as
> they should, however the recorded times are usually at around 1000 us,
> which is completely unrealistic as the links have between 2ms and 1000ms
> delay in my topology. Could anybody cast
>
> some light into how to get this metric correctly?
>
>
>
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