id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
6928	Terminal Services Guest causes CPU Storm (eats CPU)	ToddAndMargo		"Hi All,

Host: CentOS 5.5 x64
uname  -r: 2.6.18-194.3.1.el5
memory: 24 GB ECC
Processor: Intel x5650  (six hard cores)
motherboard: Supermicro X8SAX, Bios 1.1a

Guest: Windows Server 2003, SP2, x32 running Terminal Services
Guest Additions: 3.2.2

VM: VirtualBox-3.2-3.2.2_62298_rhel5-1.x86_64.rpm

Hi All,

My Guest can run Terminal Services without problem with two cores.  When I increase the guest to four cores, the Terminal Server will run for a few hours and then everyone starts complaining about how slow it gets.  Looking at CPU usage on the guest shows 100%.  

We have Thread Master ""CPUThresholdPct"" set to 12% and ""MainSampleTime"" set to 15%.  Thread Master on or off makes no difference: runs for a while, then 100% CPU usage.

I have a second customer with the same set up (12 GB, instead of 24) and Windows Server 2008 also as a Terminal Server.  They are experiencing the same problem under 3.1.8.  I must leave them on two cores as well.

These two customer are pretty angry at me for selling them a U$D 1200.00 processor that they can only use two cores on the guest.  Please fix this soon.  The natives are very restless!

Many thanks,
-T"	defect	closed	guest smp	VirtualBox 3.2.6	fixed			Windows	Linux