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Bug 178624 - app-emulation/xen-3.0.4 - Large procesor usage for Windows 2003 Server DomU when vcpu more than 2
Summary: app-emulation/xen-3.0.4 - Large procesor usage for Windows 2003 Server DomU w...
Status: RESOLVED TEST-REQUEST
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: [OLD] Server (show other bugs)
Hardware: AMD64 Linux
: High major (vote)
Assignee: Gentoo Xen Devs
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2007-05-15 12:25 UTC by Bartlomiej Dubas
Modified: 2008-08-29 15:25 UTC (History)
0 users

See Also:
Package list:
Runtime testing required: ---


Attachments
I atachemnt i put my configuration taken form emerge info (emerge_info_verbose.txt,7.15 KB, text/plain)
2007-05-15 12:26 UTC, Bartlomiej Dubas
Details

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Description Bartlomiej Dubas 2007-05-15 12:25:31 UTC
Hi,

I isntall and configure gentoo 2007 with Xen 3.0.4 avaiable in the protage tree. I have the problem with Windows 2003 Eneterprise Edition as domU. If i give 4 vcpus for such quest after system starts xentop schow that it use almoust all procesor resorces asigned to it (350-400%) even if inside the quest i don't perfrom any operation. When i asign 2 vcpus everything wirk ok... Windows runs, going up and after it the procesor usage in top xen is normal (1-5%).

I perform tests on 32bit windos as wel as 64bit windows version. On the 32bit i found osme workeround that seams to work. I install PV drivers packkage form XenExpress 3.2 instalation CD and thenus the new PV option in the boot menu. I also notice (as well for 32bit windows) that if i change the vcpu from 4 to 2 install SP2 for windows 2003 and then back to 4 vcpu the system is hanging while botting (just before che switch from splash to the login screen) and it takes about 300% cpu time in xentop. Even safe mode don't help. But if i conect via vnc to the quest before it run operating system (BIOS screen) and wait until system starts its working but not always.

While i notice that 64bit version of Widnows runs better than 32bit version (better disk and network performance) i want to use 64bit.
Comment 1 Bartlomiej Dubas 2007-05-15 12:26:58 UTC
Created attachment 119353 [details]
I atachemnt i put my configuration taken form emerge info
Comment 2 Alex Howells (RETIRED) gentoo-dev 2007-05-15 17:12:02 UTC
Is this problem specific to Gentoo, or is it reproducible on Debian/Ubuntu?
Comment 3 Bartlomiej Dubas 2007-05-16 12:05:34 UTC
(In reply to comment #2)
> Is this problem specific to Gentoo, or is it reproducible on Debian/Ubuntu?

I only use gentoo so i dont know how its look like on the other distributions. I also check openSuse 10.2 wicth have xen 3.0.3 (from Box) but becouse the SMP Windwos quests are suported since XEN 3.0.4 i don;t have chance to see this problems.
Comment 4 Micheal Marineau (RETIRED) gentoo-dev 2007-08-26 23:58:24 UTC
xen 3.1.0 is now in portage, does it resolve this issue?
Comment 5 Robert Buchholz (RETIRED) gentoo-dev 2008-08-29 15:25:51 UTC
This issue does not sounds specific to Gentoo. Please reopen if you can reproduce with recent versions of Gentoo in Gentoo, and also contact upstream if you can.