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RE: [hobbit] Hobbitping/fping behaviour
- To: <hobbit (at) hswn.dk>
- Subject: RE: [hobbit] Hobbitping/fping behaviour
- From: "Schwimmer, Eric E *HS" <EES2Y (at) hscmail.mcc.virginia.edu>
- Date: Mon, 28 Aug 2006 11:42:15 -0400
- Thread-index: AcbID2YFSbVeoSsKSNiB2g9hV0XmLQCmE5GQAAQCoLA=
- Thread-topic: [hobbit] Hobbitping/fping behaviour
It looks like the delays are coming from the usleep line in send_ping();
this looks like it was put in there to do some network/cpu throttling,
which would definitely make the bbtest-net duration longer, but I'm not
sure yet why it is affecting the icmp return times.
Running hobbitping with the flag "--max-pps=10000000" seems to fix
things.
e
-----Original Message-----
From: Schwimmer, Eric E *HS [mailto:EES2Y (at) hscmail.mcc.virginia.edu]
Sent: Monday, August 28, 2006 9:49 AM
To: hobbit (at) hswn.dk
Subject: RE: [hobbit] Hobbitping/fping behaviour
I have the same problem after upgrading to 4.2.0, but I reverted to the
version of hobbitping that was beta tested under 4.1.2p1, and both my
ping times and bbtest-net durations dropped considerably (1522 hosts
pinged in 17 seconds with the old hobbitping, down from 55 seconds with
the new hobbitping).
A diff against the two versions reveals quite a few changes that were
made;
I have been extremely pleased with the first version so I'll stick with
that for a while longer. I'll try running the new version through
gprof, but I am not as skilled at these things as Henrik :)
e
-----Original Message-----
From: Rob MacGregor [mailto:rob.macgregor (at) gmail.com]
Sent: Friday, August 25, 2006 2:26 AM
To: hobbit (at) hswn.dk
Subject: Re: [hobbit] Hobbitping/fping behaviour
On 8/24/06, GALLIOT Guillaume <Guillaume.GALLIOT (at) but.fr> wrote:
> Hello,
>
> I have updated my hobbit installation from 4.1.2 to 4.2.0
> The new hobbitping gives different results in the web interface (about
40ms
> latency on a local network) than fping (0.15 ms),i tried to reproduce
these
> results with ping,fping & hobbitping but they give me same results on
> command line (0.15ms)
>
> fping -e msrv999lno001
> msrv999lno001 is alive (0.16 ms)
>
> PING msrv999lno001 (10.0.4.173) 56(84) bytes of data.
> 64 bytes from msrv999lno001 (10.0.4.173): icmp_seq=0 ttl=64 time=0.126
ms
> 64 bytes from msrv999lno001 (10.0.4.173): icmp_seq=1 ttl=64 time=0.113
ms
>
> /usr/lib/hobbit/server/bin/hobbitping 10.0.4.173
> 10.0.4.173 is alive (0.18 ms)
>
> In the web interface I get 44 ms
>
> I reverted to fping and results are now the same on command line and
web
> interface.
>
> Does anyone has the same issue ?
Yes, I saw exactly the same - hobbitping used by hobbit had a delay of
tens of ms, used on the command line had a delay of fractions of an
ms.
--
Please keep list traffic on the list.
Rob MacGregor
Whoever fights monsters should see to it that in the process he
doesn't become a monster. Friedrich Nietzsche
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