Wireshark-bugs: [Wireshark-bugs] [Bug 2504] New: Slow response when using Expert Info Composite
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Sat, 26 Apr 2008 14:26:47 -0700 (PDT)
http://bugs.wireshark.org/bugzilla/show_bug.cgi?id=2504

           Summary: Slow response when using Expert Info Composite
           Product: Wireshark
           Version: 1.0.0
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: Normal
          Priority: Medium
         Component: Wireshark
        AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
        ReportedBy: andersen7@xxxxxxxxxxx


Build Information:
wireshark 1.0.0

Copyright 1998-2008 Gerald Combs <gerald@xxxxxxxxxxxxx> 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 with GTK+ 2.12.0, with GLib 2.14.1, with libpcap 0.9.7, with libz
1.2.3, with POSIX capabilities (Linux), with libpcre 7.2, with SMI 0.4.5, with
ADNS, without Lua, with GnuTLS 1.6.1, with Gcrypt 1.2.4, with MIT Kerberos,
without PortAudio, without AirPcap.

Running on Linux 2.6.22.17-0.1-default, with libpcap version 0.9.7.

Built using gcc 4.2.1 (SUSE Linux).

--

On larger files with no active capture "Expert Info" seems to be effective, but
"Expert Info Composite" is very slow, sometime taking 12 hours. From strace
there seems to be large quantities of lseek. I have seen this in 0.9.6 as well
as the latest 1.0.0 generally running on SuSE 10.3.

Will continue to look at it.


lseek(8, 4845568, SEEK_SET)             = 4845568
lseek(8, 4845568, SEEK_SET)             = 4845568
lseek(8, 4845568, SEEK_SET)             = 4845568
lseek(8, 4845568, SEEK_SET)             = 4845568
lseek(8, 4845568, SEEK_SET)             = 4845568
lseek(8, 4845568, SEEK_SET)             = 4845568
lseek(8, 4845568, SEEK_SET)             = 4845568
lseek(8, 4845568, SEEK_SET)             = 4845568
lseek(8, 4845568, SEEK_SET)             = 4845568
lseek(8, 4845568, SEEK_SET)             = 4845568
lseek(8, 4845568, SEEK_SET)             = 4845568
lseek(8, 4849664, SEEK_SET)             = 4849664
lseek(8, 4849664, SEEK_SET)             = 4849664
lseek(8, 4849664, SEEK_SET)             = 4849664
lseek(8, 4849664, SEEK_SET)             = 4849664
lseek(8, 4849664, SEEK_SET)             = 4849664
lseek(8, 4849664, SEEK_SET)             = 4849664
lseek(8, 4849664, SEEK_SET)             = 4849664
lseek(8, 4849664, SEEK_SET)             = 4849664
lseek(8, 4849664, SEEK_SET)             = 4849664
lseek(8, 4849664, SEEK_SET)             = 4849664


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