Hi Alexander, Today Alexander Eichner wrote:
> Hi Tobias, > > just a wild guess, is your host kernel kernel compiled with > CONFIG_HZ=100 ? VirtualBox has some problems with this low kernel timer > frequency at the moment. The following ticket has more information: > http://www.virtualbox.org/ticket/5501 the machine is running at 100 ... we have somewhat mittigated the problem now, by switching back to 1 CPU for the W2K8 guest, performance is now acceptable ... will test with a 250 kernel this weekend ... cheers tobi > Regards, > Alexander Eichner > > Am Dienstag, den 22.12.2009, 13:29 +0100 schrieb Tobias Oetiker: > > Gurus, > > > > We are running a W2K8 R2 64Bit (terminal server) Guest on Linux 2.6.33 > > > > The Hardware has 24 GB Ram and 2 * 4 Core (Xeon E5520). > > > > The Guest has 8 GB Ram and 4 Cores > > > > Seen from Linux (top), things look OK and the IO Wait is 0.0% > > > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > > 11465 root 20 0 8188m 7.8g 75m S 78 33.1 299:49.84 VBoxHeadless > > > > But the Guest feels extreemly slugish and in the Task Monitor all 4 > > CPUs are often at 100% use ... > > > > Looking at the process list, the per process percentages do not add > > up to 100% and still the Idle process does not get a share. > > > > The condition is not permanent, often there are short periods (10s) > > where the system goes quiet again and all is well. > > > > One very odd thing we see is that simple explorer.exe processes > > take up to 25% cpu ... > > > > Any ideas what could be at the root of this. > > > > cheers > > tobi > > > > > > > > > > > > > -- Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland http://it.oetiker.ch [email protected] ++41 62 775 9902 / sb: -9900 _______________________________________________ vbox-users mailing list [email protected] http://vbox.innotek.de/mailman/listinfo/vbox-users
