Bug ID |
8647
|
Summary |
SUM(tcp.time_delta)tcp.time_delta incorrect
|
Classification |
Unclassified
|
Product |
Wireshark
|
Version |
1.8.6
|
Hardware |
x86
|
OS |
Windows 7
|
Status |
UNCONFIRMED
|
Severity |
Minor
|
Priority |
Low
|
Component |
TShark
|
Assignee |
[email protected]
|
Reporter |
[email protected]
|
Build Information:
1.8.6 (SVN Rev 48142) and 1.10.0 RC1
--
I have a trace capturing an SMB file copy between Client and Server. I'm using
Wireshark to calculate how much time the Client and the Server spent turning
around frames.
Using the GUI, I see an FBAR with an approximate height of 3s when I calculate
how long the Server spent turning around frames:
Filter: tcp.srcport==445 Calc:SUM(*) tcp.time_delta Style:FBar Tick
interval:1min
And an FBAR with an approximate height of 42s when I calculate how long the
Client spent turning around frames:
Filter: tcp.dstport==445 Calc:SUM(*) tcp.time_delta Style:FBar Tick
interval:1min
Using tshark, I see a rather different result ... ~44s for /both/ cases.
tshark -nlr server.pcap -o tcp.calculate_timestamp:TRUE -R "(tcp.srcport==445)"
-qz io,stat,600,"SUM(tcp.time_delta)tcp.time_delta"
================================================
| IO Statistics |
| |
| Interval size: 44.1 secs (dur) |
| Col 1: Frames and bytes |
| 2: SUM(tcp.time_delta)tcp.time_delta |
|----------------------------------------------|
| |1 |2 |
| Interval | Frames | Bytes | SUM |
|----------------------------------------------|
| 0.0 <> 44.1 | 50069 | 50551304 | 44.145992 |
================================================
tshark -nlr server.pcap -o tcp.calculate_timestamp:TRUE -R "(tcp.dstport==445)"
-qz io,stat,600,"SUM(tcp.time_delta)tcp.time_delta"
================================================
| IO Statistics |
| |
| Interval size: 44.1 secs (dur) |
| Col 1: Frames and bytes |
| 2: SUM(tcp.time_delta)tcp.time_delta |
|----------------------------------------------|
| |1 |2 |
| Interval | Frames | Bytes | SUM |
|----------------------------------------------|
| 0.0 <> 44.1 | 50069 | 50551304 | 44.145992 |
================================================
I'm willing to believe that 42s ~= 44s in the case of the Client ... but I
believe that the Server-side calculation (srcport==445) is an error.
If you would like more information, do let me know.
--sk
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