Re: New packet list - out of memory?

[Bill Meier <wmeier () newsguy com>]

Bill Meier wrote:
> A data point: A few days ago while working on bug #2375 I noticed that 
> on Windows that if I defined the env logicals to not use se_alloc & etc 
> that *much* less memory was required to load a capture. (20% of that 
> used with se_alloc & etc ? I don't quite remember).

Details:

Env: Windows Vista

Actions:

1. Load Wireshark
    Determine "Private Working Set", "Working Set", "Commit Size"

2. Load a 40 Meg capture file.
    Determine ....  again

The above was done for:

a. Wireshark with new_packet_list:

b. Wireshark w/new_packet_list:
     set WIRESHARK_DEBUG_EP_NO_CHUNKS=T
     set WIRESHARK_DEBUG_SE_NO_CHUNKS=T

c. Wireshark without new packet list

d. Wireshark without new packet list
     set WIRESHARK_DEBUG_EP_NO_CHUNKS=T
     set WIRESHARK_DEBUG_SE_NO_CHUNKS=T

Measurements

Note: The Working Set was always about 20 Meg larger than the
    Private Working Set(PWS) so only the PWS is shown.

(All values in Megs)
                                        EP/SE Chunks        No Chunks
                                        PWS  Commit        PWS  Commit
                                        ---- -------     ----- -------
Wireshark: current_packet_list
      After startup:                     42      62         42     52
      After 40M CF load:                180     399        195    205

Wireshark: new_packet_list:
      After startup:                     42      62         42     52
      After 40M CF load:                136     564        165    177


A conclusion:

Commit Size (which I believe is the amount of VM address space used
    by the process and which is presumably the limiting factor for
    memory usage).
       - Best for new_packet_list/no_chunks;
       - worst (quite) for new_packet_list/chunks;


Comments welcome...

(I did these tests somewhat quickly so I could have missed something...)


Bill


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