Very long file load/save times in Windows 7 guest through vboxsvr

[Eric Carroll]

A save of a powerpoint 1.5MB file using smb takes under 3 sec. Saving the same file through vboxsvr takes up to 3 minutes.

Similarly load times are very long. Loading the same 1.5 MB ppt through vboxsvr takes over 30s, while smb is less than 4 sec.

tcpdump of wire during the load and save shows significant netbios traffic attempting to resolve vboxsvr. It also shows DNS lookups of vboxsvr. I have added vboxsvr to the hosts file without success so far.

Provider Order shows Virtualbox Shared Folders first in the list.

Disabling "Client for Microsoft Networks" and "File & Printer Sharing" did not cause the netbios lookups to go away.

Significant repeats in the vb log file of the following were found:

00:20:33.024 SharedFolders host service: request to unmap folder handle 0
00:20:33.024 SharedFolders host service: unmap operation result VINF_SUCCESS.
00:20:37.990 SharedFolders host service: request to map folder Home
00:20:37.990 SharedFolders host service: map operation result VINF_SUCCESS.
00:20:37.990     Mapped to handle 0.

Upgrading to 3.0.10 resolved the "no more files" problem but did not resolve the performance issue.

Guest: Windows 7
Host: 2.6.28-16-generic in Ubuntu 9.04
Network interface in bridged mode.
CPU: Intel T2600 @2.16 GHz (dual core i686)

[Eric Carroll]

tcpdump trace during load

[Eric Carroll]

tcpdump trace during load

[Eric Carroll]

tcpdump during save

[Eric Carroll]

vbox log

[Eric Carroll]

For calibration, WinXP SP3 VM with 3.0.10 guest additions: load time of 1.5 MB ppt is 16 sec, and does show netbios lookups (attached).

[Eric Carroll]

tcpdump of load in WinXPSP3

[sunlover]

This is duplicate of #1728