Re: [Xen-devel] Strange network behaviour

[Marco Tizzoni <marco.tizzoni@xxxxxxxxx>]

On Tue, Jul 28, 2009 at 3:03 PM, George
Dunlap<George.Dunlap@xxxxxxxxxxxxx> wrote:
> What's the granularity of your measurement?

I use tcpdump/tshark to dump e decode incoming packets and I think it
uses the timestamp from the nic.
The two gaps are 0.011781 and 0.011731 and they remain constant over
the time. This is a snap:

# Order  AbsoluteTime  DeltaTime
1 0.000000 0.000000
2 0.009734 0.009734
3 0.021515 0.011781
4 0.033245 0.011730
5 0.045027 0.011782
6 0.056757 0.011730
7 0.068538 0.011781
8 0.080269 0.011731
9 0.092050 0.011781
10 0.103831 0.011781
11 0.115562 0.011731
12 0.127342 0.011780
13 0.139073 0.011731


Attached a decoded dump of 10 seconds with arrival order, absolute
time, relative time.
Also you can find a graph where this issue is clear.

Thanks,
Marco

Attachment: 200907281507.dump-stats.txt.gz
Description: GNU Zip compressed data

Attachment: dump.png.gz
Description: GNU Zip compressed data

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