Wireshark-bugs: [Wireshark-bugs] [Bug 4249] New: Frame Time Delta incorrect

Date: Tue, 17 Nov 2009 18:11:07 -0800 (PST)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=4249

           Summary: Frame Time Delta incorrect
           Product: Wireshark
           Version: 1.2.4
          Platform: x86
        OS/Version: Windows XP
            Status: NEW
          Severity: Normal
          Priority: Low
         Component: Wireshark
        AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
        ReportedBy: hararghost@xxxxxxxxxxx


Build Information:
Using v1.2.4 (SVN Rev 30978) as downloaded from official website.
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I am testing a microcontroller that sends packets over ethernet at a regular
time interval (1.89mS). The time interval of the packets was being erronously
reported by Wireshark as 1.37mS.

I am using a laptop to run Wireshark. The problem was that the laptop's BIOS
forces the CPU to run at 1.6Ghz when not plugged into a power socket. When the
laptop is running on battery, most utilities report the CPU clock speed as
being 2.2Ghz (its maximum speed), even though it is in reality running at
1.6Ghz. I believe this is the reason Wireshark is reporting incorrect time
deltas.

Plugging the laptop into the wall power socket fixes the problem (i.e.,
Wireshark reports the correct time deltas).

1.6Ghz/2.2Ghz = 1.37mS/1.89mS.


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