Wireshark-bugs: [Wireshark-bugs] [Bug 10670] New: IO Chart Scale incorrect for 2nd Chart

Date: Thu, 06 Nov 2014 04:29:55 +0000
Bug ID 10670
Summary IO Chart Scale incorrect for 2nd Chart
Product Wireshark
Version 1.12.1
Hardware x86
OS Mac OS X 10.4
Status UNCONFIRMED
Severity Normal
Priority Low
Component GTK+ UI
Assignee [email protected]
Reporter [email protected]

Created attachment 13235 [details]
example of incorrect scaling in IO Chart

Build Information:
2014-11-05 22:49:15.340 defaults[94808:2131367] 
The domain/default pair of (kCFPreferencesAnyApplication,
AppleAquaColorVariant) does not exist
wireshark 1.12.1 (v1.12.1-0-g01b65bf from master-1.12)

Copyright 1998-2014 Gerald Combs <[email protected]> and contributors.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Compiled (64-bit) with GTK+ 2.24.17, with Cairo 1.10.2, with Pango 1.30.1, with
GLib 2.36.0, with libpcap, with libz 1.2.3, without POSIX capabilities, with
SMI
0.4.8, without c-ares, without ADNS, with Lua 5.1, without Python, with GnuTLS
2.12.19, with Gcrypt 1.5.0, with MIT Kerberos, with GeoIP, with PortAudio
V19-devel (built Jul 16 2013 19:05:52), with AirPcap.

Running on Mac OS X 10.10, build 14A389 (Darwin 14.0.0), with locale .UTF-8,
with libpcap version 1.5.3 - Apple version 47, with libz 1.2.5, GnuTLS 2.12.19,
Gcrypt 1.5.0, without AirPcap.
Intel(R) Core(TM) i7-4558U CPU @ 2.80GHz

Built using llvm-gcc 4.2.1 (Based on Apple Inc. build 5658) (LLVM build
2336.9.00).
--
I was using Wireshark to analyze a vary large packet trace (4 million packets)
showing traffic between multiple clients and a set of 2 DNS load-balanced
servers. I was expecting each server to handle 50% of the traffic but when I
plotted using IO Chart it seemed as though one server was taking almost 7x
traffic (see image attached).  

After manually inspecting the packets I could not find the load imbalance. So I
went back to the same IO Chart window from before and reloaded the charts by
clicking on the "Graph 1" button in the lower right to disable that chart line
and then clicking again on the "Graph 1" button to re-enable that line.  After
the chart was redrawn it showed the correct 50/50 load-distribution.


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