Date: Fri, 6 Dec 2002 12:51:04 -0500 From: Wesley Eddy <email@example.com> Subject: tcptrace-bugs [Marc.Herbert@ens-lyon.fr: Re: TSN as double instead of unsigned...] Message-ID: <20021206125104.C17783@irg.cs.ohiou.edu>
----- Forwarded message from Marc.Herbert@ens-lyon.fr -----
Date: Fri, 6 Dec 2002 18:08:52 +0100 (CET)
Subject: Re: TSN as double instead of unsigned...
To: wesley Eddy <firstname.lastname@example.org>
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I write to you since I do not want to make some noise in the
tcptrace-bugs archive. I thought about using tcptrace-maintainers, but
your web site says its purpose is not to discuss about tcptrace
technical details. Please forward this message to the appropriate
destination, thanks in advance.
On 5 Déc, Pour: email@example.com wrote:
> /* Header for all other plots */
> /* graph coordinates... */
> /* X coord is timeval unless graph_time_zero is true */
> /* Y is signed except when it's a sequence number */
> /* ugly hack -- unsigned makes the graphs hard to work with and is
> only needed for the time sequence graphs */
> /* suggestion by Michele Clark at UNC - make them double instead */
> Mfprintf(f,"%s %s\n",
> ((strcmp(ppi->ylabel,"sequence number") == 0)&&(!graph_seq_zero))?
> If I write a "uint64.c" new type of "coord_type" for xplot, would you
> consider including the code in your xplot releases ?
When I wrote the message above, I thought tcptrace was unwrapping the
32bit TSN, that's why it was advertising it as a double. Later I
realized that it was not unwrapped. So the question is : why unsigned
does make the graphs "hard to work with" ?
Then there is this wrapping TSN problem. I see two options: move it to
64bits both in tcptrace and xplot, with unwrapping in tcptrace, or
another, maybe lighter solution, would be to shift the Y axis in xplot,
in order to put 2^32 in the middle of the Y axis when needed, instead of
Thanks for feedback.
PS: would a read-only access to your CVS server be foreseeable?
-- Marc Herbert Ph.D intern INRIA / Sun Labs Europe
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